PAGE i OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES NUMBER 6 Prepared by: Marvin E. Baldwin Chairman, AAVSO Eclipsing Binary Committee Gerard Samolyk AAVSO Eclipsing Binary Committee October 2000 ----------------------------------------------------------------------------- PAGE ii Funds for publication were provided by The Harold S. Martin Fund. ISBN 1-878174-34-7 COPYRIGHT 2000 The American Association of Variable Star Observers 25 Birch Street Cambridge, MA 02138 USA All rights reserved. No part of this book may be reproduced by any mechanical, photographic, or electronic process, nor may it be stored on an information retrieval system, transmitted, or otherwise copied for public or private use, without the written permission of the American Association of Variable Star Observers. ----------------------------------------------------------------------------- PAGE iii TABLE OF CONTENTS Introduction...................................................v References....................................................vi Table 1. Publications Containing Previous AAVSO Minima for Each Star in this Monograph..................................vii Table 2. Information on O-C Minima and Linear Elements......viii Table 3. Observers Contributing to this Monograph.............ix Compilation of Times of Minima and O-C Diagrams................1 ----------------------------------------------------------------------------- PAGE iv is blank ----------------------------------------------------------------------------- PAGE v INTRODUCTION This compilation contains 966 minima timings of 50 eclipsing binary stars. It represents a portion of the stars observed by participants in the AAVSO's eclipsing binary program since 1976 plus a few older minima in the case of U Gem, and continues the listing of minima published in Observed Minima Timings of Eclipsing Binaries Nos. 1, 2, 3, 4, and 5. Except where otherwise specified, all minima are determined from visual observations reduced by the authors using a computerized tracing paper method. The tracing paper software was written specifically for this purpose by Ron Baldwin and Gerard Samolyk. Some CCD observations were reduced by the observers using the method of Kwee and Van Worden (1957). The standard error is included in a footnote in each of these cases. CCD data obtained by Ronald Zissell of U Gem and IP Peg were reduced by the observer using the mean chord method. In instances where fragments of eclipses are observed during different cycles, the data points are reduced to heliocentric phase and combined into a single light curve for the tracing paper process. In these cases, the listed time of minimum is the eclipse nearest to the midpoint of the observing interval that corresponds to the calculated phase of minimum light. A footnote is added to these listings indicating the observing interval in JD. Linear elements in the General Catalogue of Variable Stars (Kholopov et al. 1985) were used to compute the O-C's, with the exception of IP Peg. In the case of IP Peg, the linear elements were calculated by linear regression from the listed times of minima. All elements used in this publication are listed in Table 2. The number of observations used for determination of each time of minimum is given under N. This work is sponsored by the AAVSO, with Marvin Baldwin acting as program coordinator. The O-C diagrams accompanying the minima listings represent not only the minima tabulated here but also all previously published minima associated with the AAVSO program. The years spanned by these diagrams are listed by star in Table 2, with the second column giving the year of the earliest observation appearing in the diagram and the third and fourth columns listing the earliest and latest year of the minima tabulated in this publication. The material in this monograph may be accessed electronically via the AAVSO web site home page http://www.aavso.org, or the AAVSO ftp site ftp.aavso.org (198.116.78.2) in /monographs. Observers contributing data used in this publication are listed in Table 3. Their dedicated efforts are greatly appreciated. Marvin E. Baldwin Gerard Samolyk 8655 N Co. Rd. 775E 9504 W Barnard Ave. Butlerville, IN 47223 Greenfield, WI 53228 USA USA ----------------------------------------------------------------------------- PAGE vi REFERENCES 1 Ashbrook, J. 1963, Sky & Telescope, 26, 3,153. 2 Ashbrook, J. 1964, Sky & Telescope, 27,1, 58. 3 Ashbrook, J. 1964, Sky & Telescope, 27, 5, 317. 4 Ashbrook, J. 1964, Sky & Telescope, 28, 10, 244. 5 Ashbrook, J. 1965, Sky & Telescope, 29, 4, 254. 6 Robinson, L. J. 1965, Inf. Bull. Var. Stars, No. 111. 7 Robinson, L. J. 1965, Inf. Bull. Var. Stars, No. 114. 8 Robinson, L. J. 1965, Inf. Bull. Var. Stars, No. 119. 9 Robinson, L. J. 1966, Inf. Bull. Var. Stars, No. 129. 10 Robinson, L. J. 1966, Inf. Bull. Var. Stars, No. 154. 11 Robinson, L. J. 1967, Inf. Bull. Var. Stars, No. 180. 12 Robinson, L. J. 1967, Inf. Bull. Var. Stars, No. 221. 13 Robinson, L. J., and Ashbrook, J. 1968, Inf. Bull. Var. Stars, No. 247. 14 Baldwin, M. E. 1973, Inf. Bull. Var. Stars, No. 795. 15 Baldwin, M. E. 1974, J. Amer. Assoc. Var. Star Obs., 3, 60. 16 Baldwin, M. E. 1975, J. Amer. Assoc. Var. Star Obs., 4, 86. 17 Baldwin, M. E. 1976, J. Amer. Assoc. Var. Star Obs., 5, 29. 18 Baldwin, M. E. 1976, J. Amer. Assoc. Var. Star Obs., 5, 84. 19 Baldwin, M. E. 1977, J. Amer. Assoc. Var. Star Obs., 6, 24. 20 Baldwin, M. E. 1978, J. Amer. Assoc. Var. Star Obs., 7, 28. 21 Baldwin, M. E., and Samolyk, G. 1993, Observed Minima Timings of Eclipsing Binaries No. 1, AAVSO, Cambridge, MA. 22 Baldwin, M. E., and Samolyk, G. 1995, Observed Minima Timings of Eclipsing Binaries No. 2, AAVSO, Cambridge, MA. 23 Baldwin, M. E., and Samolyk, G. 1996, Observed Minima Timings of Eclipsing Binaries No. 3, AAVSO, Cambridge, MA. 24 Baldwin, M. E., and Samolyk, G. 1997, Observed Minima Timings of Eclipsing Binaries No. 4, AAVSO, Cambridge, MA. 25 Baldwin, M. E., and Samolyk, G. 1999, Observed Minima Timings of Eclipsing Binaries No. 5, AAVSO, Cambridge, MA. 26 Kholopov, P. N., et al. 1985, General Catalogue of Variable Stars, Fourth Edition, Moscow. 27 Kwee K. K., and Van Worden, H. 1957, Bull. Astron. Inst. Netherlands, 12, 327. ----------------------------------------------------------------------------- PAGE vii TABLE 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 RT AND X X X X X X X X X X X X X X X X X X X TW AND X X X XZ AND X X X X X X X X X X X X X X X AB AND X X X X X X X X X X X X X CX AQR X X X X X X X X X X X X KP AQL OO AQL X X X X X X X X X X X X X X X X X X X V346 AQL X X X X X X X X X X X X X X WW AUR X X X X X X X X X X X X X X X RT CMA TU CMA RZ CAS X X X X X X X X X X X X X X X X X X X X X X AB CAS X X X X X X X X X X X X X X IR CAS X X X SS COM CC COM X ZZ CYG X X X X X X X X X X X V477 CYG X X X X X X X X X V704 CYG X YY DEL X X X X X X FZ DEL X X X X X X X X Z DRA X X X X X X X X X X X X X X TZ ERI YY ERI X X X X X X X X X X U GEM AL GEM AR LAC CM LAC X X X X X X X RU MON X X X X X RW MON X X X AT MON MX MON IP PEG RT PER X X X X X X X X X X X X X X X V505 SGR X X X X X X X X V1968 SGR AO SER X RW TAU X X X X X X X X X EQ TAU X X HU TAU X X X X X X X X X X V TRI X X X RV TRI X X X W UMA X X X X X X X X X X XZ UMA X X X X X X X RU UMI X X X AZ VIR X AY VUL BS VUL X BT VUL BU VUL X X X X X X X X X X X This table identifies publications in which previous AAVSO minima for each star have been published. The numbers across the top of the table correspond to those given at the beginning of each entry in the References. ----------------------------------------------------------------------------- PAGE viii TABLE 2 Earliest Earliest Latest Epoch Period Minimum Listing Listing 2400000 + (days) RT AND 1963 1999 1999 41141.88902 0.628929513 TW AND 1969 1981 1997 39020.4104 4.122774 XZ AND 1950 1997 1999 23977.1915 1.357278 AB AND 1966 1998 2000 36109.57928 0.33189215 CX AQR 1964 1997 1999 36453.555 0.5559862 KP AQL 1976 1976 1999 40396.4912 3.36747959 OO AQL 1960 1998 2000 38613.2222 0.50678848 V346 AQL 1965 1997 1999 41918.384 1.106363 WW AUR 1962 1997 2000 32945.53930 2.52501922 RT CMA 1977 1977 2000 26625.547 1.293772 TU CMA 1976 1976 1998 26977.445 1.1278041 RZ CAS 1961 1999 2000 43200.3063 1.195247 AB CAS 1965 1997 1999 42714.4627 1.3668738 IR CAS 1975 1997 1999 42364.054 0.6806854 SS COM 1977 1977 2000 25002.510 0.4127919 CC COM 1977 1997 2000 39533.5830 0.22068628 ZZ CYG 1965 1997 1999 45000.3570 0.62861644 V477 CYG 1966 1995 1999 44189.2639 2.3469906 V704 CYG 1977 1996 1999 37939.409 0.570704 YY DEL 1966 1997 1999 42959.512 0.7930922 FZ DEL 1968 1997 2000 31324.329 0.7832126 Z DRA 1965 1997 2000 43499.736 1.3574560 TZ ERI 1976 1976 2000 42414.263 2.6060653 YY ERI 1968 1999 2000 41581.624 0.32149415 U GEM 1965 1965 2000 37638.82685 0.17690602 AL GEM 1976 1976 2000 26324.4467 1.3913385 AR LAC 1976 1976 1999 41593.7123 1.98319204 CM LAC 1966 1995 1999 27026.316 1.6046916 RU MON 1967 1976 2000 41743.1947 3.584749 RW MON 1968 1995 2000 33680.4481 1.90609412 AT MON 1976 1976 2000 26607.500 2.02902 MX MON 1995 1995 1998 30130.2166 0.68644524 IP PEG 1995 1995 1999 49966.7175 0.15820612 RT PER 1965 1997 2000 33376.0583 0.84940032 V505 SGR 1964 1995 1999 44461.5907 1.18287156 V1968 SGR 1977 1977 1999 37820.669 0.5632499 AO SER 1976 1996 1999 34133.464 0.87934745 RW TAU 1965 1992 2000 45684.204 2.7688356 EQ TAU 1976 1996 2000 40213.325 0.34134848 HU TAU 1964 1995 2000 41275.3219 2.0562997 V TRI 1975 1997 2000 24474.305 0.5852057 RV TRI 1975 1997 2000 46033.308 0.75366648 W UMA 1966 1999 2000 45765.7385 0.33363749 XZ UMA 1967 1993 2000 46168.426 1.22232 RU UMI 1972 1991 2000 41596.3365 0.52492618 AZ VIR 1975 1995 2000 43976.540 0.34966511 AY VUL 1978 1978 1999 42685.377 2.4124468 BS VUL 1976 1995 1999 43271.578 0.47597147 BT VUL 1977 1977 1998 35402.180 1.141200 BU VUL 1966 1997 2000 33533.683 0.5689930 The O-C diagrams for each star contain the minima spanning the years in columns two and four. The listing of new minima spans the years in columns three and four. The fifth and sixth columns contain the linear elements used tocalculate the O-C values in this publication. All of these elements are from the General Catalogue of Variable Stars (Kholopov et al. 1985) except where noted. ----------------------------------------------------------------------------- PAGE ix TABLE 3 P. Atwood 7 B. Manske 1 M. Baldwin 200 D. Matsnev 1 R. Berg 61 E. Mayer 2 G. Chaple 10 J. McKenna 6 L. Cook (CCD) 8 J. Myra 1 S. Cook 10 L. Peltier 12 S. Cook (CCD) 17 S. Rowse 1 D. Cortner 1 D. Ruokonen 5 T. Cragg 1 F. Salvaggio (CCD) 2 B. Cudnik 1 G. Samolyk 267 A. Dill (CCD) 2 G. Samolyk (CCD) 14 S. Dvorak (CCD) 5 R. Schmude 19 S. Foglia 38 S. Sharpe 1 E. Halbach 1 L. Shaw 2 G. Hanson 3 M. Smith 2 R. Hays 40 A. Sonka 4 C. Hesseltine 4 C. Stephan 64 C. Hesseltine (CCD) 1 P. Sullivan (CCD) 1 R. Hill 28 G. Wedemayer 3 T. Hoff 1 D. Weier 2 A. Howell (CCD) 7 M. Weier 1 C. Hurless 3 D. Williams 54 G. Kelley 1 R. Zissell (CCD) 50 G. Lubcke (CCD) 1 44 Observers 966 Observations This table lists the observers and the number of minima contributed by each. CCD stands for Charge-Coupled Device; PEP stands for Photoelectric Photometry (V). ----------------------------------------------------------------------------- RT AND JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 51370.793 16264 -0.006 19 M. Baldwin 51394.696 16302 -0.002 18 M. Baldwin 51406.645 16321 -0.003 12 M. Baldwin 51411.676 16329 -0.003 19 M. Baldwin 51423.624 16348 -0.005 13 M. Baldwin 51426.764 16353 -0.009 10 M. Baldwin 51433.681 16364 -0.011 13 G. Samolyk 51438.708 16372 -0.015 13 M. Baldwin 51452.564 16394 0.005 12 G. Samolyk 51457.587 16402 -0.004 14 M. Baldwin 51467.644 16418 -0.010 12 R. Berg 51469.545 16421 0.004 13 C. Stephan 51489.6630 16453 -0.0033 A. Howell (CCD) 0.0003 51489.667 16453 0.001 12 R. Berg 51496.582 16464 -0.003 17 C. Stephan 51497.839 16466 -0.003 14 M. Baldwin 51513.552 16491 -0.014 14 M. Baldwin 51525.513 16510 -0.002 12 C. Stephan TW AND JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 44845.863 1413 -0.027 26 E. Halbach 46016.730 1697 -0.028 15 S. Cook 46049.719 1705 -0.021 11 P. Atwood 46078.574 1712 -0.025 12 D. Williams 49224.242 1) 2475 -0.034 15 S. Cook 49302.570 2494 -0.039 9 M. Baldwin 49574.683 2560 -0.029 18 M. Baldwin 49607.659 2568 -0.035 22 M. Baldwin 49978.718 2658 -0.026 13 M. Baldwin 50007.563 : 2665 -0.040 5 M. Baldwin 50007.572 2) 2665 -0.031 15 S. Cook (CCD) 50349.750 2748 -0.043 14 M. Baldwin 50720.811 2838 -0.032 18 R. Hill 1) Observations combined from 49211 to 49236 2) Observations combined from 50007 to 50011 XZ AND JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50632.844 19639 0.070 11 M. Baldwin 50696.638 19686 0.072 17 M. Baldwin 50719.713 19703 0.073 10 M. Baldwin 50727.853 19709 0.069 22 R. Hill 51027.825 19930 0.083 12 M. Baldwin 51046.826 19944 0.082 15 M. Baldwin 51076.684 19966 0.080 20 G. Samolyk 51080.760 19969 0.084 13 M. Baldwin 51125.552 20002 0.086 14 C. Stephan 51129.624 20005 0.086 14 M. Baldwin 51133.695 20008 0.085 17 R. Hill 51133.696 20008 0.086 14 M. Baldwin 51224.635 20075 0.088 20 G. Samolyk 51224.637 20075 0.090 18 M. Baldwin 51407.875 20210 0.095 19 M. Baldwin 51426.875 20224 0.093 18 M. Baldwin 51433.665 20229 0.097 14 M. Baldwin 51433.666 20229 0.098 12 G. Samolyk 51437.737 20232 0.097 16 M. Baldwin 51456.736 20246 0.094 19 R. Hill 51467.598 20254 0.098 17 D. Williams 51486.600 20268 0.098 13 M. Baldwin 51486.6001 20268 0.0981 A. Howell (CCD) 0.0002 51486.604 20268 0.102 15 G. Samolyk 51539.537 20307 0.101 12 C. Stephan AB AND JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 51174.649 45391.5 -0.013 15 G. Samolyk 51411.625 46105.5 -0.008 11 G. Samolyk 51419.752 46130 -0.012 9 S. Dvorak (CCD) 51420.743 46133 -0.017 10 R. Berg 51429.704 46160 -0.017 13 R. Berg 51431.694 46166 -0.018 14 R. Berg 51431.696 46166 -0.016 10 M. Baldwin 51432.694 46169 -0.014 14 R. Berg 51433.682 46172 -0.022 13 R. Berg 51435.677 46178 -0.018 15 R. Berg 51438.673 46187 -0.009 17 M. Baldwin 51447.631 46214 -0.012 14 D. Williams 51451.611 46226 -0.015 15 G. Samolyk 51452.611 46229 -0.010 18 G. Samolyk 51458.584 46247 -0.012 12 M. Baldwin 51460.735 46253.5 -0.018 15 G. Samolyk 51469.539 46280 -0.009 11 C. Stephan 51488.627 46337.5 -0.005 15 G. Samolyk 51510.696 46404 -0.007 16 G. Samolyk 51539.564 46491 -0.013 15 C. Stephan 51544.543 46506 -0.013 11 D. Williams 51546.540 46512 -0.007 17 C. Stephan 51720.778 47037 -0.012 16 G. Samolyk CX AQR JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50690.688 25607 -0.006 15 M. Baldwin 50695.697 25616 -0.000 11 M. Baldwin 50696.805 25618 -0.004 13 M. Baldwin 50749.628 25713 0.000 19 G. Samolyk 50755.756 25724 0.012 16 R. Hill 50768.535 25747 0.003 10 C. Stephan 51067.653 26285 0.001 14 R. Berg 51097.676 26339 0.000 13 D. Williams 51101.567 26346 0.000 10 M. Baldwin 51106.572 26355 0.001 12 M. Baldwin 51106.573 26355 0.002 15 R. Berg 51111.581 26364 0.006 13 R. Berg 51136.589 26409 -0.006 16 M. Baldwin 51400.688 26884 0.000 17 M. Baldwin 51406.798 26895 -0.006 19 M. Baldwin 51420.705 26920 0.001 11 R. Berg 51426.821 26931 0.002 18 M. Baldwin 51434.6005 26945 -0.0027 A. Howell (CCD) 0.0008 51435.714 26947 -0.001 12 M. Baldwin 51439.608 26954 0.001 13 M. Baldwin 51454.621 26981 0.002 14 G. Samolyk 51455.736 26983 0.005 18 R. Hill 51513.550 27087 -0.003 16 M. Baldwin KP AQL JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 43019.763 779 0.005 11 D. Ruokonen 43344.717 875.5 -0.003 16 G. Samolyk 44457.661 1206 -0.011 10 G. Samolyk 44792.734 1305.5 -0.002 13 G. Samolyk 45122.755 1403.5 0.006 13 G. Samolyk 45905.690 1636 0.002 14 D. Williams 45910.737 1637.5 -0.002 14 D. Williams 45964.620 1653.5 0.001 15 D. Williams 45991.565 1661.5 0.006 10 G. Samolyk 47688.776 2165.5 0.008 18 G. Samolyk 49914.652 3) 2826.5 -0.020 15 S. Cook (CCD) 51394.655 3266 -0.025 15 M. Baldwin 51421.605 3274 -0.014 14 M. Baldwin 51426.669 3275.5 -0.002 15 D. Williams 51431.709 : 3277 -0.013 8 M. Baldwin 51724.689 3364 -0.004 10 M. Baldwin 3) Observations combined from 49909 to 49919 OO AQL JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 51005.7292 24453 0.0083 15 S. Dvorak (CCD) 0.0005 51376.704 25185 0.014 17 C. Stephan 51384.810 25201 0.011 19 R. Hays 51406.6007 25244 0.0101 A. Howell (CCD) 0.0004 51408.629 25248 0.011 13 D. Williams 51411.672 25254 0.014 15 D. Williams 51411.673 25254 0.015 12 G. Samolyk 51419.7769 25270 0.0098 13 S. Dvorak (CCD) 0.0009 51440.555 25311 0.010 15 G. Chaple 51443.596 25317 0.010 15 R. Hays 51461.573 25352.5 -0.004 17 G. Samolyk 51461.578 25352.5 0.001 16 D. Weier 51461.585 25352.5 0.008 14 M. Weier 51464.3693 25358 0.0048 F. Salvaggio (CCD) 51476.540 25382 0.013 14 C. Stephan 51478.560 25386 0.005 17 R. Hays 51479.316 25387.5 0.001 15 S. Foglia 51481.3432 25391.5 0.0013 F. Salvaggio (CCD) 51481.609 25392 0.014 14 C. Stephan 51495.283 25419 0.004 12 S. Foglia 51513.530 25455 0.007 14 R. Hays 51698.769 25820.5 0.015 19 G. Samolyk 51720.808 25864 0.009 13 G. Samolyk V346 AQL JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50658.651 6959 0.000 11 C. Stephan 50668.608 6968 0.000 8 M. Baldwin 50669.711 6969 -0.004 19 G. Samolyk 50689.625 6987 -0.004 14 R. Hays 50720.596 7015 -0.011 17 R. Hays 50731.667 7025 -0.004 16 R. Hays 50991.660 7260 -0.006 10 M. Baldwin 51012.685 7279 -0.002 16 G. Samolyk 51013.788 7280 -0.006 14 R. Hays 51044.767 7308 -0.005 10 M. Baldwin 51053.620 7316 -0.003 6 M. Baldwin 51074.638 7335 -0.006 12 R. Berg 51084.598 7344 -0.003 14 R. Hays 51105.617 7363 -0.005 17 R. Hays 51376.677 7608 -0.004 17 C. Stephan 51397.696 7627 -0.006 10 D. Williams 51407.652 7636 -0.007 14 D. Williams 51407.653 7636 -0.006 11 M. Baldwin 51428.674 7655 -0.006 13 R. Hays 51438.631 7664 -0.006 12 M. Baldwin 51438.634 7664 -0.003 15 D. Williams 51469.609 7692 -0.006 16 R. Hays 51510.542 7729 -0.009 12 M. Baldwin 51510.544 7729 -0.007 15 R. Hays WW AUR JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50494.423 6950 0.000 16 S. Foglia 50509.566 6956 -0.007 10 R. Schmude 50537.354 6967 0.006 19 S. Foglia 50812.583 7076 0.008 12 C. Stephan 50841.610 7087.5 -0.003 11 C. Stephan 50889.584 7106.5 -0.004 8 R. Schmude 51163.566 7215 0.013 14 J. McKenna 51173.665 : 7219 0.012 15 J. McKenna 51201.440 7230 0.012 7 S. Foglia 51202.6916 7230.5 0.0008 16 A. Dill (CCD) 51216.580 7236 0.002 14 R. Schmude 51221.623 7238 -0.005 17 R. Schmude 51245.638 7247.5 0.022 22 G. Samolyk 51273.385 7258.5 -0.006 8 S. Foglia 51510.744 7352.5 0.001 20 G. Samolyk 51518.322 7355.5 0.004 13 S. Foglia 51547.358 7367 0.002 12 S. Foglia 51567.574 7375 0.018 15 G. Samolyk RT CMA JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 43190.594 12804 -0.410 13 G. Samolyk 44622.737 13911 -0.472 10 G. Samolyk 44635.673 13921 -0.474 14 G. Samolyk 44957.806 14170 -0.490 13 G. Samolyk 46445.624 15320 -0.510 9 G. Samolyk 46489.597 15354 -0.525 10 G. Samolyk 47185.647 15892 -0.525 10 R. Hill 48251.695 16716 -0.545 14 G. Samolyk 49061.588 17342 -0.553 11 G. Samolyk 49326.801 17547 -0.563 7 R. Hill 49779.616 17897 -0.568 16 G. Samolyk 50488.595 18445 -0.577 15 G. Samolyk 51110.876 18926 -0.600 17 G. Samolyk 51567.5625 19279 -0.6149 23 G. Samolyk (CCD) 0.0002 TU CMA JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 43094.885 14291 -0.008 9 G. Samolyk 43154.670 14344 0.003 13 G. Samolyk 43948.649 15048 0.008 10 G. Samolyk 44576.823 15605 -0.005 7 C. Hesseltine 44593.751 15620 0.006 12 G. Samolyk 44654.644 15674 -0.002 15 G. Samolyk 44672.678 15690 -0.013 10 G. Samolyk 45352.745 16293 -0.012 18 G. Samolyk 46489.592 17301 0.008 12 G. Samolyk 47161.750 17897 -0.005 15 G. Samolyk 47170.767 17905 -0.010 13 G. Samolyk 47540.696 18233 -0.001 17 G. Samolyk 49754.584 20196 0.007 12 G. Samolyk 50866.577 21182 -0.014 16 G. Samolyk RZ CAS JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 51361.481 6828 0.028 25 S. Foglia 51411.681 6870 0.028 15 G. Samolyk 51411.690 6870 0.037 13 D. Williams 51429.615 6885 0.033 15 D. Williams 51435.594 6890 0.036 12 D. Williams 51440.370 6894 0.031 23 S. Foglia 51446.349 6899 0.034 13 S. Foglia 51458.305 6909 0.037 17 S. Foglia 51460.699 6911 0.041 17 G. Samolyk 51483.396 : 6930 0.028 23 S. Foglia 51490.576 6936 0.037 17 G. Samolyk 51495.361 6940 0.041 20 S. Foglia 51496.553 6941 0.037 17 C. Stephan 51502.521 6946 0.029 15 C. Stephan 51507.310 6950 0.037 8 S. Foglia 51519.262 6960 0.037 13 S. Foglia 51539.585 6977 0.040 16 C. Stephan 51545.550 6982 0.029 14 R. Schmude 51550.346 6986 0.044 17 S. Foglia 51551.534 6987 0.037 14 D. Williams 51551.534 6987 0.037 12 R. Schmude 51564.679 6998 0.034 10 D. Williams 51576.633 7008 0.036 17 G. Samolyk 51582.616 7013 0.042 20 G. Samolyk 51587.386 7017 0.032 19 S. Foglia 51642.364 7063 0.028 11 S. Foglia 51705.728 7116 0.044 17 G. Samolyk AB CAS JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50632.816 5793 0.053 12 M. Baldwin 50669.725 5820 0.057 24 G. Samolyk 50695.693 5839 0.054 11 M. Baldwin 50706.630 5847 0.056 18 S. Cook (CCD) 50732.597 5866 0.053 14 M. Baldwin 50814.609 5926 0.052 28 S. Cook (CCD) 51079.786 6120 0.056 14 M. Baldwin 51101.655 6136 0.055 11 M. Baldwin 51138.558 6163 0.052 14 M. Baldwin 51157.696 6177 0.054 11 M. Baldwin 51224.675 6226 0.056 12 M. Baldwin 51276.618 6264 0.058 11 M. Baldwin 51407.836 6360 0.056 14 M. Baldwin 51429.707 6376 0.057 13 M. Baldwin 51429.710 6376 0.060 14 R. Berg 51440.644 6384 0.059 15 D. Williams 51451.580 6392 0.060 14 G. Samolyk 51492.582 6422 0.056 14 M. Baldwin 51496.681 6425 0.054 16 M. Baldwin 51544.527 6460 0.060 10 D. Williams IR CAS JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50810.703 12409 0.024 20 R. Hill 51019.676 12716 0.026 11 M. Baldwin 51040.769 12747 0.018 13 M. Baldwin 51083.652 12810 0.018 14 M. Baldwin 51130.625 12879 0.024 14 G. Samolyk 51160.572 12923 0.021 19 G. Samolyk 51162.611 12926 0.018 18 M. Baldwin 51407.657 13286 0.017 15 M. Baldwin 51424.673 13311 0.016 11 M. Baldwin 51426.719 13314 0.020 15 M. Baldwin 51428.760 13317 0.019 7 M. Baldwin 51437.612 13330 0.022 12 M. Baldwin 51439.655 13333 0.023 16 M. Baldwin 51452.585 13352 0.020 16 G. Samolyk 51486.620 13402 0.020 13 M. Baldwin 51486.625 13402 0.025 17 G. Samolyk 51492.745 13411 0.019 8 M. Baldwin 51492.750 13411 0.024 21 R. Hill SS COM JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 43184.784 44047 0.029 16 G. Samolyk 43272.681 44260 0.002 5 D. Ruokonen 43577.773 44999 0.040 18 G. Samolyk 43603.775 45062 0.036 19 G. Samolyk 43982.712 45980 0.030 18 G. Samolyk 44670.891 47647 0.085 20 G. Samolyk 48331.703 56515 0.259 15 G. Samolyk 48682.803 57365.5 0.279 18 G. Samolyk 50523.759 61825 0.390 17 G. Samolyk 50572.673 61943.5 0.388 18 G. Samolyk 50594.7482 61997 0.3788 98 G. Lubcke (CCD) 0.0001 50921.705 62789 0.404 20 G. Samolyk 50926.643 62801 0.389 18 G. Samolyk 51656.7242 64569.5 0.4476 49 G. Samolyk (CCD) 0.0002 CC COM JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50523.860 49800.5 -0.010 14 G. Samolyk 50921.758 51603.5 -0.009 15 G. Samolyk 50925.620 51621 -0.009 14 G. Chaple 51223.759 52972 -0.018 13 G. Samolyk 51245.624 53071 -0.001 17 G. Samolyk 51248.706 53085 -0.008 8 R. Berg 51256.653 53121 -0.006 16 G. Samolyk 51256.654 53121 -0.005 9 R. Berg 51261.732 53144 -0.003 11 R. Berg 51275.625 53207 -0.013 15 G. Samolyk 51350.655 53547 -0.016 13 G. Samolyk 51609.755 54721 -0.002 11 R. Berg 51611.735 54730 -0.008 9 R. Berg 51627.629 54802 -0.004 9 R. Berg 51629.839 54812 0.000 12 R. Berg 51633.805 54830 -0.007 10 R. Berg 51639.767 54857 -0.003 10 R. Berg 51643.738 54875 -0.005 13 R. Berg 51657.638 54938 -0.008 12 D. Williams 51664.696 54970 -0.012 14 D. Williams ZZ CYG JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50661.646 9006 -0.031 8 M. Baldwin 50683.650 9041 -0.028 8 R. Berg 50683.655 9041 -0.023 13 G. Samolyk 50717.600 9095 -0.024 13 R. Berg 50952.696 9469 -0.030 9 M. Baldwin 50991.672 9531 -0.028 7 M. Baldwin 51025.621 9585 -0.025 11 R. Berg 51069.629 9655 -0.020 12 G. Samolyk 51108.598 9717 -0.025 11 M. Baldwin 51130.601 9752 -0.024 11 G. Samolyk 51370.718 10134 -0.038 13 M. Baldwin 51370.724 10134 -0.032 11 D. Williams 51394.613 10172 -0.030 8 M. Baldwin 51397.757 10177 -0.030 11 M. Baldwin 51407.807 10193 -0.037 12 M. Baldwin 51429.812 10228 -0.034 18 M. Baldwin 51431.698 10231 -0.034 14 M. Baldwin 51431.706 10231 -0.026 12 R. Berg 51433.589 10234 -0.029 11 G. Samolyk 51450.555 10261 -0.035 10 C. Stephan 51460.621 10277 -0.027 13 G. Samolyk 51480.741 10309 -0.023 11 L. Shaw 51487.644 10320 -0.035 10 M. Baldwin 51489.535 10323 -0.030 11 C. Stephan 51492.671 10328 -0.037 14 M. Baldwin 51499.592 10339 -0.030 14 R. Berg V477 CYG JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 49927.642 2445 -0.014 13 D. Williams 49927.647 2445 -0.009 6 S. Cook (CCD) 49955.816 2457 -0.004 12 G. Samolyk 50279.696 2595 -0.009 15 S. Cook (CCD) 50326.632 2615 -0.012 14 S. Cook (CCD) 50671.647 2762 -0.005 11 R. Schmude 50692.775 2771 0.000 13 R. Hays 50725.623 2785 -0.010 15 R. Schmude 50779.606 2808 -0.008 16 G. Samolyk 50934.505 : 2874 -0.010 9 D. Matsnev 51328.794 3042 -0.015 13 R. Hays 51408.591 3076 -0.016 12 D. Williams 51469.614 3102 -0.015 12 D. Williams V704 CYG JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50391.618 21819 0.018 18 G. Samolyk 50578.821 22147 0.031 17 G. Samolyk 50614.774 22210 0.029 19 G. Samolyk 50726.632 22406 0.029 22 G. Samolyk 51041.672 22958 0.041 15 G. Samolyk 51045.6563 22965 0.0299 63 G. Samolyk (CCD) 0.0003 51073.6195 23014 0.0286 48 G. Samolyk (CCD) 0.0003 51097.590 23056 0.030 10 D. Weier 51097.592 23056 0.032 16 G. Samolyk 51109.571 23077 0.026 19 G. Samolyk 51384.6544 23559 0.0299 69 C. Hesseltine (CCD)0.0002 51476.5394 23720 0.0315 44 G. Samolyk (CCD) 0.0005 YY DEL JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50662.814 9713 -0.003 11 M. Baldwin 50732.607 9801 -0.002 14 M. Baldwin 51019.710 10163 0.002 14 M. Baldwin 51019.716 10163 0.008 27 C. Stephan 51023.679 10168 0.006 16 C. Stephan 51046.684 10197 0.011 11 M. Baldwin 51054.610 10207 0.006 16 C. Stephan 51069.676 10226 0.003 16 M. Baldwin 51069.679 10226 0.006 21 G. Samolyk 51104.581 10270 0.012 15 C. Stephan 51376.611 10613 0.011 12 C. Stephan 51406.742 10651 0.005 15 M. Baldwin 51429.743 10680 0.006 21 M. Baldwin 51433.706 10685 0.004 12 M. Baldwin 51437.671 10690 0.003 18 M. Baldwin 51476.541 10739 0.012 16 C. Stephan 51491.598 10758 0.000 13 M. Baldwin 51693.841 11013 0.005 12 C. Stephan 51705.7373 11028 0.0045 55 G. Samolyk (CCD) 0.0002 FZ DEL JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50698.634 24737 -0.025 10 M. Baldwin 50716.640 24760 -0.033 15 G. Samolyk 50716.647 24760 -0.026 10 R. Berg 51019.745 25147 -0.031 15 R. Hays 51023.657 25152 -0.035 13 C. Stephan 51055.772 25193 -0.032 17 R. Hays 51099.639 25249 -0.025 15 R. Hays 51110.599 25263 -0.030 11 D. Williams 51110.601 25263 -0.028 13 R. Berg 51132.528 25291 -0.031 13 R. Hays 51132.532 25291 -0.027 8 R. Berg 51395.685 25627 -0.033 12 R. Hays 51395.686 25627 -0.032 10 R. Berg 51420.752 25659 -0.029 11 R. Berg 51424.673 25664 -0.024 20 M. Baldwin 51428.5798 25669 -0.0334 A. Howell (CCD) 0.0012 51435.630 25678 -0.032 13 M. Baldwin 51435.632 25678 -0.030 15 D. Williams 51435.636 25678 -0.026 13 R. Berg 51457.560 25706 -0.032 11 R. Hays 51727.769 26051 -0.031 25 B. Manske Z DRA JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50631.705 5254 -0.105 9 M. Baldwin 50726.728 5324 -0.104 15 G. Samolyk 50897.765 5450 -0.106 18 R. Hill 50908.621 5458 -0.110 14 D. Williams 50950.697 5489 -0.115 13 T. Hoff 50950.698 5489 -0.114 13 C. Hesseltine 50950.700 5489 -0.112 9 M. Baldwin 50950.701 5489 -0.111 18 G. Samolyk 50950.702 5489 -0.110 18 D. Williams 50984.637 5514 -0.111 10 D. Williams 50988.709 5517 -0.112 9 M. Baldwin 51041.646 5556 -0.116 9 M. Baldwin 51041.650 5556 -0.112 12 G. Samolyk 51406.794 5825 -0.123 18 M. Baldwin 51451.590 5858 -0.123 14 G. Samolyk 51520.817 5909 -0.127 10 M. Baldwin 51660.633 6012 -0.128 9 M. Baldwin 51664.704 6015 -0.130 16 M. Baldwin 51664.707 6015 -0.127 15 D. Williams 51664.7096 6015 -0.1242 49 P. Sullivan (CCD) 0.0001 51668.773 6018 -0.133 20 R. Hill 51793.6595 6110 -0.1327 75 G. Samolyk (CCD) 0.0001 TZ ERI JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 42807.776 151 -0.003 17 P. Atwood 43172.621 291 -0.007 14 G. Samolyk 44608.585 842 0.015 10 G. Samolyk 44634.642 852 0.011 15 G. Samolyk 44957.798 976 0.015 13 G. Samolyk 47532.627 1964 0.052 12 M. Smith 47545.658 1969 0.052 19 M. Smith 48616.782 2380 0.084 14 R. Hill 49270.923 2631 0.102 18 G. Samolyk 49364.754 2667 0.115 16 R. Hill 49661.839 2781 0.108 15 R. Hill 50503.640 3104 0.150 20 G. Samolyk 51144.752 3350 0.170 18 G. Samolyk 51488.764 3482 0.182 18 G. Samolyk 51582.583 3518 0.182 17 G. Samolyk 51595.614 3523 0.183 14 G. Samolyk YY ERI JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 51496.739 30840.5 0.075 14 G. Samolyk 51510.727 30884 0.078 17 G. Samolyk 51516.676 30902.5 0.079 15 C. Stephan 51539.671 30974 0.087 17 C. Stephan 51541.5952 30980 0.0824 33 S. Dvorak (CCD) 0.0001 51544.641 30989.5 0.074 20 G. Samolyk 51546.581 30995.5 0.085 20 C. Stephan 51551.549 31011 0.070 14 R. Schmude 51560.5636 31039 0.0827 36 S. Dvorak (CCD) 0.0002 51573.416 31079 0.075 8 S. Foglia 51574.552 31082.5 0.086 15 C. Stephan 51576.630 31089 0.074 15 G. Samolyk 51581.619 31104.5 0.080 13 C. Stephan 51582.595 31107.5 0.092 18 G. Samolyk 51586.597 31120 0.075 19 C. Stephan 51592.560 31138.5 0.090 15 C. Stephan 51595.596 31148 0.072 17 G. Samolyk 51601.552 31166.5 0.081 14 C. Stephan 51609.585 31191.5 0.076 15 G. Samolyk U GEM JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 38873.634 6980 0.003 20 C. Hurless 38878.587 7008 0.003 30 C. Hurless 38881.591 7025 -0.001 45 C. Hurless 39035.853 7897 -0.001 34 L. Peltier 39036.915 7903 0.000 25 L. Peltier 39038.862 7914 0.001 32 L. Peltier 39058.852 8027 0.001 34 L. Peltier 39062.923 8050 0.003 23 L. Peltier 39063.807 8055 0.002 18 L. Peltier 39064.868 8061 0.002 24 L. Peltier 39065.929 8067 0.001 20 L. Peltier 39084.859 8174 0.002 31 L. Peltier 39087.866 8191 0.002 33 L. Peltier 39095.829 8236 0.004 36 L. Peltier 39420.804 10073 0.003 34 L. Peltier 43511.581 33197 0.005 23 G. Kelley 43578.627 33576 0.004 20 D. Cortner 45057.566 41936 0.008 35 G. Chaple 45083.569 42083 0.006 34 G. Chaple 46549.599 50370 0.016 25 G. Chaple 46845.557 52043 0.010 35 G. Chaple 46846.619 52049 0.011 34 G. Chaple 46851.572 52077 0.010 36 G. Chaple 49804.6678 68770 0.0140 R. Zissell (CCD) 49805.7280 68776 0.0127 R. Zissell (CCD) 50114.6029 70522 0.0097 R. Zissell (CCD) 50114.7798 70523 0.0097 R. Zissell (CCD) 50160.6078 70782 0.0190 R. Zissell (CCD) 50160.7828 70783 0.0171 R. Zissell (CCD) 50404.7320 72162 0.0129 R. Zissell (CCD) 50540.5967 72930 0.0138 R. Zissell (CCD) 50568.5475 73088 0.0135 R. Zissell (CCD) 50804.7175 74423 0.0139 R. Zissell (CCD) 50860.620 74739 0.014 41 G. Chaple 51610.7007 78979 0.0133 R. Zissell (CCD) 51621.6719 79041 0.0163 R. Zissell (CCD) 51622.5551 79046 0.0150 R. Zissell (CCD) 51623.6176 79052 0.0161 R. Zissell (CCD) AL GEM JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 43131.786 12080 -0.030 13 D. Ruokonen 43131.792 12080 -0.024 8 G. Wedemayer 43131.795 12080 -0.021 16 G. Samolyk 43856.682 12601 -0.021 12 G. Samolyk 44638.636 13163 0.001 17 G. Samolyk 44670.628 13186 -0.008 15 G. Samolyk 45797.625 13996 0.005 15 G. Samolyk 46078.686 14198 0.015 11 D. Williams 46124.588 14231 0.003 11 S. Cook 46149.638 14249 0.009 10 S. Cook 46437.633 14456 -0.003 13 G. Samolyk 49445.751 16618 0.041 11 R. Hill 49779.684 : 16858 0.053 19 G. Samolyk 51567.5518 18143 0.0507 38 G. Samolyk (CCD) 0.0002 AR LAC JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 42997.820 708 0.008 10 G. Samolyk 44191.705 1310 0.011 15 G. Samolyk 44419.748 1425 -0.013 11 G. Samolyk 44560.555 1496 -0.013 16 G. Hanson 45131.741 1784 0.014 13 G. Samolyk 45264.600 1851 -0.001 12 G. Samolyk 46682.604 2566 0.021 12 G. Samolyk 47412.417 2934 0.019 13 G. Samolyk 47418.370 2937 0.023 14 G. Samolyk 48219.569 3341 0.012 13 G. Samolyk 48568.576 3517 -0.023 19 G. Samolyk 48911.669 4) 3690 -0.022 17 S. Sharpe 49183.388 3827 0.000 21 S. Foglia 49288.465 3880 -0.032 16 S. Foglia 49308.329 3890 0.000 21 S. Foglia 50095.563 : 4287 -0.094 19 S. Cook (CCD) 50676.653 4580 -0.079 19 S. Cook (CCD) 51489.707 : 4990 -0.134 10 R. Berg 51491.706 : 4991 -0.118 10 R. Berg 51499.632 4995 -0.125 13 R. Berg 51543.262 5017 -0.125 8 S. Foglia 4) Observations combined from 48899 to 48924 CM LAC JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 49963.776 14294 -0.002 12 D. Williams 49984.635 14307 -0.004 12 D. Williams 50053.652 14350 0.012 19 G. Samolyk 50321.625 14517 0.001 13 D. Williams 50337.666 14527 -0.005 16 S. Cook (CCD) 50427.537 14583 0.003 9 R. Schmude 50698.731 14752 0.005 17 G. Samolyk 50719.584 14765 -0.003 16 D. Williams 50796.610 14813 -0.003 12 R. Hays 51027.684 14957 -0.004 14 D. Williams 51425.650 15205 -0.002 16 D. Williams 51433.678 15210 0.003 14 R. Hays 51433.689 15210 0.014 16 R. Berg 51462.561 15228 0.001 12 R. Hays RU MON JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 42800.709 295 0.013 14 P. Atwood 42800.714 295 0.018 7 T. Cragg 42845.598 : 307.5 0.093 9 G. Samolyk 43225.590 413.5 0.102 11 C. Stephan 43578.598 512 0.012 9 E. Mayer 43587.630 514.5 0.082 7 E. Mayer 44614.584 801 0.005 11 G. Samolyk 44958.724 897 0.009 12 G. Samolyk 46114.774 1219.5 -0.022 9 P. Atwood 46123.756 1222 -0.002 16 P. Atwood 46159.608 1232 0.003 8 S. Cook 46494.706 1325.5 -0.073 12 P. Atwood 47184.842 1518 -0.002 12 P. Atwood 48697.597 1940 -0.011 10 S. Cook 50095.645 2330 -0.015 17 C. Stephan 51579.7084 2744 -0.0376 36 G. Samolyk (CCD) 0.0004 51599.1149 5) 2749.5 -0.3472 127 G. Samolyk (CCD) 0.0003 5) Observations combined from 51595 to 51602 RW MON JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 49750.712 8431 -0.016 15 R. Hill 49773.579 8443 -0.022 10 M. Baldwin 49773.585 8443 -0.016 15 C. Stephan 49813.608 8464 -0.021 15 M. Baldwin 50095.709 8612 -0.022 13 C. Stephan 50097.620 : 8613 -0.017 11 C. Stephan 50503.603 8826 -0.032 18 G. Samolyk 50503.611 8826 -0.024 18 R. Hays 50869.580 9018 -0.025 11 M. Baldwin 51214.578 9199 -0.030 14 R. Hays 51254.602 9220 -0.034 13 R. Hays 51254.608 9220 -0.028 7 M. Baldwin 51580.546 9391 -0.032 17 C. Stephan AT MON JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 43131.837 8144 -0.002 8 G. Wedemayer 43131.842 8144 0.003 17 G. Samolyk 43190.672 8173 -0.008 11 D. Ruokonen 43190.679 8173 -0.001 11 G. Samolyk 43537.645 8344 0.002 12 G. Samolyk 44598.812 8867 -0.008 17 G. Samolyk 45298.837 9212 0.005 14 G. Samolyk 46820.607 9962 0.010 15 G. Samolyk 48297.724 10690 0.000 18 G. Samolyk 49754.574 11408 0.014 17 G. Samolyk 50109.638 : 11583 -0.001 9 S. Cook (CCD) 51229.652 : 12135 -0.006 7 M. Baldwin 51231.691 12136 0.004 18 M. Baldwin 51576.625 12306 0.005 16 G. Samolyk 51582.707 12309 0.000 11 M. Baldwin MX MON JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 48682.681 27027 -0.091 11 M. Baldwin 49013.558 27509 -0.081 12 M. Baldwin 49037.582 27544 -0.082 15 M. Baldwin 49455.610 28153 -0.099 12 M. Baldwin 49744.624 28574 -0.079 15 M. Baldwin 49755.600 28590 -0.086 17 M. Baldwin 49766.578 28606 -0.091 13 M. Baldwin 49768.639 28609 -0.089 15 M. Baldwin 50107.744 29103 -0.088 10 M. Baldwin 50519.597 29703 -0.103 13 M. Baldwin 50845.658 30178 -0.103 17 M. Baldwin 50869.671 30213 -0.116 24 M. Baldwin 50902.626 30261 -0.110 19 M. Baldwin 51609.667 31291 -0.108 18 M. Baldwin IP PEG JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 49966.7162 0 0.0003 R. Zissell (CCD) 49967.6662 6 0.0011 R. Zissell (CCD) 49971.6202 31 -0.0001 R. Zissell (CCD) 49975.5764 56 0.0009 R. Zissell (CCD) 50003.5796 233 0.0015 R. Zissell (CCD) 50261.7724 1865 0.0009 R. Zissell (CCD) 50292.7818 2061 0.0017 R. Zissell (CCD) 50302.7486 2124 0.0015 R. Zissell (CCD) 50317.6188 2218 0.0003 R. Zissell (CCD) 50330.7487 2301 -0.0010 R. Zissell (CCD) 50345.7795 2396 0.0002 R. Zissell (CCD) 50346.7289 2402 0.0003 R. Zissell (CCD) 50347.6771 2408 -0.0007 R. Zissell (CCD) 50348.6254 2414 -0.0016 R. Zissell (CCD) 50350.6855 2427 0.0018 R. Zissell (CCD) 50371.5674 2559 0.0004 R. Zissell (CCD) 50382.6419 2629 0.0004 R. Zissell (CCD) 50404.6322 2768 -0.0000 R. Zissell (CCD) 50415.5463 2837 -0.0022 R. Zissell (CCD) 50417.6039 2850 -0.0013 R. Zissell (CCD) 50420.6093 2869 -0.0018 R. Zissell (CCD) 50421.5585 2875 -0.0019 R. Zissell (CCD) 50426.6220 2907 -0.0010 R. Zissell (CCD) 50427.5711 2913 -0.0011 R. Zissell (CCD) 50449.5620 3052 -0.0010 R. Zissell (CCD) 50457.4712 3102 -0.0021 R. Zissell (CCD) 50609.8307 4065 0.0043 R. Zissell (CCD) 50626.7576 4172 0.0031 R. Zissell (CCD) 50655.7069 4355 0.0005 R. Zissell (CCD) 50670.7364 4450 0.0004 R. Zissell (CCD) 50679.7543 4507 0.0005 R. Zissell (CCD) 50715.6639 4734 -0.0028 R. Zissell (CCD) 50828.4700 5447 0.0018 R. Zissell (CCD) 50846.5013 5561 -0.0024 R. Zissell (CCD) 51122.7278 7307 -0.0050 R. Zissell (CCD) 51467.6174 9487 -0.0061 R. Zissell (CCD) 51473.6290 9525 -0.0064 L. Cook (CCD) 0.0009 51473.7868 9526 -0.0068 L. Cook (CCD) 0.0015 51475.6872 9538 -0.0049 L. Cook (CCD) 0.0006 51475.8456 9539 -0.0047 L. Cook (CCD) 0.0008 51482.6483 9582 -0.0049 L. Cook (CCD) 0.0016 51482.8067 9583 -0.0047 L. Cook (CCD) 0.0016 51508.595 9746 -0.004 39 L. Cook (CCD) 51508.754 9747 -0.003 21 L. Cook (CCD) RT PER JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50721.702 20421 0.040 11 M. Baldwin 50733.595 20435 0.041 9 M. Baldwin 50772.668 20481 0.042 13 R. Hays 50839.767 20560 0.038 19 R. Hill 50845.717 20567 0.042 14 R. Hays 51139.608 20913 0.041 18 M. Baldwin 51144.707 20919 0.043 11 M. Baldwin 51156.595 20933 0.040 16 R. Hays 51161.695 20939 0.043 17 M. Baldwin 51162.540 20940 0.039 12 M. Baldwin 51183.787 20965 0.051 22 R. Hill 51195.671 20979 0.043 14 R. Hays 51201.618 20986 0.045 14 C. Stephan 51212.660 20999 0.044 13 R. Berg 51218.604 21006 0.043 14 R. Berg 51224.553 21013 0.046 10 C. Stephan 51224.557 21013 0.050 13 R. Hays 51252.581 21046 0.044 13 R. Hays 51408.868 21230 0.041 19 M. Baldwin 51426.703 21251 0.038 19 M. Baldwin 51437.747 21264 0.040 15 M. Baldwin 51511.648 21351 0.043 14 R. Hays 51522.687 6) 21364 0.040 16 M. Baldwin 51551.572 21398 0.046 12 D. Williams 51551.573 21398 0.047 12 R. Hays 51579.598 21431 0.041 15 R. Hays 51601.684 21457 0.043 17 R. Hill 6) Observations combined from 51522 to 51523 V505 SGR JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50008.068 7) 4689 -0.007 54 R. Schmude 50030.540 4708 -0.010 12 R. Schmude 50043.547 4719 -0.015 9 R. Schmude 50277.769 4917 -0.001 12 R. Schmude 50283.680 : 4922 -0.005 8 R. Schmude 50302.604 : 4938 -0.006 20 S. Cook (CCD) 50341.636 4971 -0.009 12 R. Schmude 50341.642 4971 -0.003 10 D. Williams 50671.660 5250 -0.006 12 R. Schmude 50684.676 5261 -0.002 12 D. Williams 51027.701 5551 -0.010 14 D. Williams 51027.710 5551 -0.001 17 R. Berg 51370.734 5841 -0.009 13 D. Williams 51370.749 5841 0.006 12 G. Samolyk 51376.663 5846 0.005 16 C. Stephan 51447.618 5906 -0.012 14 D. Williams 51473.637 : 5928 -0.016 17 L. Shaw 7) Observations combined from 49972 to 50043 V1968 SGR JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 43315.708 : 9756 -0.027 8 D. Ruokonen 43315.724 9756 -0.011 13 G. Samolyk 43751.676 10530 -0.014 10 G. Samolyk 44019.786 11006 -0.011 17 G. Samolyk 44766.677 12332 0.010 9 G. Samolyk 45541.689 13708 -0.010 16 G. Samolyk 45888.672 : 14324 0.011 9 G. Samolyk 46293.634 15043 -0.003 11 G. Samolyk 47010.641 16316 -0.013 9 G. Samolyk 47688.817 17520 0.010 17 G. Samolyk 47749.654 17628 0.016 11 G. Samolyk 48066.747 18191 -0.001 13 G. Samolyk 50692.624 22853 0.005 16 G. Samolyk 51370.761 : 24057 -0.011 10 C. Hesseltine 51370.777 24057 0.005 18 G. Samolyk 51783.6235 24790 -0.0105 46 G. Samolyk (CCD) 0.0009 AO SER JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50165.740 18232 0.013 11 M. Baldwin 50224.663 18299 0.020 16 M. Baldwin 50304.680 18390 0.016 16 M. Baldwin 50514.844 18629 0.016 15 M. Baldwin 50573.760 18696 0.016 19 M. Baldwin 50631.796 18762 0.015 17 M. Baldwin 50923.745 19094 0.021 16 M. Baldwin 50981.781 19160 0.020 18 R. Hill 51273.719 19492 0.015 17 M. Baldwin 51317.686 19542 0.014 19 M. Baldwin 51397.708 19633 0.016 10 M. Baldwin 51427.603 19667 0.013 15 M. Baldwin 51660.632 19932 0.015 13 M. Baldwin 51667.666 19940 0.014 15 M. Baldwin RW TAU JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 48635.724 1066 -0.059 9 R. Hill 48898.755 1161 -0.067 11 M. Baldwin 49712.774 1455 -0.086 30 R. Hays 49748.767 1468 -0.088 32 B. Cudnik 49773.684 1477 -0.090 8 J. Myra 50133.623 1607 -0.100 27 R. Hays 50133.626 1607 -0.097 16 C. Stephan 50139.159 8) 1609 -0.101 49 S. Rowse 50504.635 1741 -0.112 30 G. Samolyk 50504.635 1741 -0.112 27 R. Hays 50839.648 1862 -0.128 18 R. Hill 51160.825 1978 -0.136 22 G. Samolyk 51163.591 1979 -0.139 24 R. Hays 51163.592 1979 -0.138 10 J. McKenna 51570.6000 2126 -0.1485 117 G. Samolyk (CCD) 0.0001 51606.5936 2139 -0.1497 62 G. Samolyk (CCD) 0.0001 51606.595 2139 -0.148 21 C. Stephan 8) Observations combined from 50119 to 50158 EQ TAU JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50320.812 29610.5 -0.012 14 G. Samolyk 50376.789 29774.5 -0.016 13 G. Samolyk 50474.585 30061 -0.017 17 G. Samolyk 50488.586 30102 -0.011 14 G. Samolyk 50503.611 30146 -0.005 14 G. Samolyk 50517.601 30187 -0.011 17 G. Samolyk 50779.584 30954.5 -0.013 15 G. Samolyk 51141.581 32015 -0.016 15 G. Samolyk 51144.831 32024.5 -0.008 14 G. Samolyk 51156.596 32059 -0.020 11 G. Samolyk 51189.543 32155.5 -0.013 17 G. Samolyk 51223.674 32255.5 -0.017 15 G. Samolyk 51256.617 32352 -0.014 11 G. Samolyk 51488.905 33032.5 -0.014 15 G. Samolyk 51538.563 33178 -0.022 12 G. Samolyk 51544.701 33196 -0.028 14 G. Samolyk 51567.576 33263 -0.023 15 G. Samolyk 51576.630 33289.5 -0.015 13 G. Samolyk 51579.707 33298.5 -0.010 13 G. Samolyk HU TAU JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 49722.610 4108 0.009 13 G. Samolyk 49722.625 4108 0.024 13 M. Baldwin 49759.606 4126 -0.008 19 G. Samolyk 50053.677 4269 0.012 19 G. Samolyk 50415.592 : 4445 0.018 17 S. Cook (CCD) 50417.647 4446 0.017 15 J. Mc Kenna 51139.398 4797 0.006 14 S. Foglia 51166.114 :9) 4810 -0.009 17 A. Sonka 51172.310 4813 0.018 13 A. Sonka 51174.356 4814 0.007 17 A. Sonka 51176.417 4815 0.012 22 A. Sonka 51180.523 4817 0.005 21 J. McKenna 51182.586 4818 0.012 20 J. McKenna 51256.610 4854 0.009 15 G. Samolyk 51573.291 5008 0.020 9 S. Foglia 9) Observations combined from 51157 to 51175 V TRI JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 50668.698 44761 0.001 8 M. Baldwin 50696.789 44809 0.002 11 M. Baldwin 50719.610 44848 0.000 10 M. Baldwin 50726.633 44860 0.000 13 M. Baldwin 50729.561 44865 0.002 8 C. Stephan 50743.609 44889 0.005 15 C. Stephan 51046.744 45407 0.004 6 M. Baldwin 51083.612 45470 0.004 8 M. Baldwin 51100.583 45499 0.004 16 C. Stephan 51100.583 45499 0.004 14 M. Baldwin 51138.613 45564 -0.005 16 C. Stephan 51139.792 45566 0.004 12 M. Baldwin 51145.638 45576 -0.002 14 R. Berg 51193.625 45658 -0.002 19 C. Stephan 51224.639 45711 -0.004 17 G. Samolyk 51407.810 46024 -0.002 12 M. Baldwin 51438.828 46077 0.000 15 M. Baldwin 51457.556 46109 0.001 11 M. Baldwin 51461.648 46116 -0.003 11 G. Samolyk 51488.573 46162 0.002 16 M. Baldwin 51492.669 46169 0.002 15 M. Baldwin 51553.535 46273 0.007 13 C. Stephan 51567.582 46297 0.009 19 G. Samolyk RV TRI JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50719.598 6218 -0.008 8 M. Baldwin 50811.540 6340 -0.013 25 G. Chaple 50820.583 6352 -0.014 13 C. Stephan 50869.575 6417 -0.011 12 M. Baldwin 50872.592 6421 -0.008 13 M. Baldwin 51083.617 6701 -0.010 15 M. Baldwin 51129.590 6762 -0.011 14 M. Baldwin 51132.606 6766 -0.009 14 R. Berg 51135.621 6770 -0.009 13 M. Baldwin 51144.661 6782 -0.013 14 R. Berg 51175.566 6823 -0.008 10 C. Stephan 51428.791 7159 -0.015 14 M. Baldwin 51490.596 7241 -0.011 15 G. Samolyk 51493.605 7245 -0.017 13 M. Baldwin 51496.619 7249 -0.017 13 M. Baldwin 51499.6347 7253 -0.0163 A. Howell (CCD) 0.0002 51539.582 7306 -0.013 12 C. Stephan 51554.657 7326 -0.012 10 M. Baldwin 51582.540 7363 -0.014 8 M. Baldwin 51582.544 7363 -0.010 13 G. Samolyk W UMA JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 51212.671 16326 -0.033 12 R. Berg 51214.678 16332 -0.028 10 R. Berg 51223.687 16359 -0.027 14 G. Samolyk 51258.7141 16464 -0.0320 13 A. Dill (CCD) 51261.720 16473 -0.029 13 R. Berg 51334.451 16691 -0.031 9 S. Foglia 51549.646 17336 -0.032 24 S. Cook (CCD) 51571.336 17401 -0.028 13 S. Foglia 51574.332 17410 -0.035 11 S. Foglia 51575.338 17413 -0.030 15 S. Foglia 51579.681 17426 -0.024 18 G. Samolyk 51584.346 17440 -0.030 10 S. Foglia 51587.338 17449 -0.041 15 S. Foglia 51594.347 17470 -0.038 15 S. Foglia 51596.354 17476 -0.033 12 S. Foglia 51608.699 17513 -0.033 12 D. Williams 51611.701 17522 -0.034 12 R. Berg 51615.374 17533 -0.031 15 S. Foglia 51620.375 17548 -0.034 13 S. Foglia 51621.704 17552 -0.040 11 R. Berg 51629.713 17576 -0.038 8 R. Berg 51629.715 17576 -0.036 12 D. Williams 51633.725 17588 -0.030 9 R. Berg 51639.720 17606 -0.040 8 R. Berg 51657.400 17659 -0.043 10 S. Foglia 51657.749 17660 -0.028 14 D. Williams 51664.755 17681 -0.028 9 D. Williams 51665.742 17684 -0.042 15 R. Schmude 51669.411 17695 -0.043 8 S. Foglia 51671.753 17702 -0.036 14 R. Schmude XZ UMA JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 49061.639 2367 -0.018 17 G. Samolyk 49754.683 2934 -0.030 16 G. Samolyk 50133.599 3244 -0.033 10 S. Cook (CCD) 50161.703 3267 -0.042 16 R. Hill 50200.827 : 3299 -0.033 9 R. Hill 50249.719 3339 -0.033 15 G. Samolyk 50376.837 3443 -0.037 17 G. Samolyk 50540.625 3577 -0.040 17 M. Baldwin 50546.736 3582 -0.040 19 M. Baldwin 50579.740 3609 -0.039 18 M. Baldwin 50936.651 3901 -0.045 13 R. Berg 51261.791 4167 -0.042 10 R. Berg 51601.590 4445 -0.048 21 C. Stephan 51629.697 4468 -0.055 11 R. Berg 51629.701 4468 -0.051 18 D. Williams 51629.706 4468 -0.046 17 G. Samolyk RU UMI JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 48320.638 12810 -0.003 10 S. Cook 48794.644 13713 -0.005 10 S. Cook 49100.681 14296 -0.000 12 S. Cook 49164.713 14418 -0.009 16 G. Samolyk 49194.639 14475 -0.004 11 S. Cook 49333.733 14740 -0.015 17 G. Samolyk 49635.574 15315 -0.007 14 G. Samolyk 50123.754 16245 -0.008 16 S. Cook (CCD) 50165.753 : 16325 -0.003 8 S. Cook (CCD) 50313.787 16607 0.001 17 G. Samolyk 50523.750 17007 -0.006 17 G. Samolyk 51088.575 18083 -0.002 14 G. Samolyk 51109.572 18123 -0.002 19 G. Samolyk 51130.561 18163 -0.010 16 G. Samolyk 51248.669 18388 -0.010 16 R. Berg 51257.593 18405 -0.010 14 C. Stephan 51261.791 18413 -0.011 10 R. Berg 51300.638 18487 -0.009 14 R. Berg 51586.718 19032 -0.014 19 G. Samolyk 51607.725 19072 -0.004 12 C. Stephan 51629.763 : 19114 -0.013 7 R. Berg 51629.772 19114 -0.004 11 D. Williams 51639.738 19133 -0.011 11 R. Berg AZ VIR JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 49858.768 16822.5 -0.013 14 G. Samolyk 49872.744 16862.5 -0.024 18 G. Samolyk 49899.678 16939.5 -0.014 12 G. Samolyk 50249.687 17940.5 -0.020 15 G. Samolyk 50488.858 18624.5 -0.020 14 G. Samolyk 50523.838 18724.5 -0.006 18 G. Samolyk 50572.786 18864.5 -0.011 15 G. Samolyk 50578.729 18881.5 -0.013 13 G. Samolyk 50897.629 10) 19793.5 -0.007 17 C. Stephan 50921.759 19862.5 -0.004 19 G. Samolyk 50926.647 19876.5 -0.012 14 G. Samolyk 50950.779 19945.5 -0.006 16 G. Samolyk 51260.756 20832 -0.008 16 C. Stephan 51275.611 20874.5 -0.013 13 G. Samolyk 51629.815 21887.5 -0.020 16 G. Samolyk 51643.633 21927 -0.014 13 G. Samolyk 51679.6452 22030 -0.0172 32 G. Samolyk (CCD) 0.0002 51693.630 22070 -0.019 18 C. Stephan 10) Observations combined from 50897 to 50898 AY VUL JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 43693.777 418 -0.003 18 G. Samolyk 43693.782 418 0.002 17 G. Wedemayer 43734.791 435 0.000 10 C. Hesseltine 44132.832 600 -0.013 17 G. Samolyk 44880.704 910 0.000 15 G. Samolyk 46769.642 1693 -0.007 15 G. Samolyk 46998.826 1788 -0.006 11 R. Hill 48161.632 2270 0.001 15 G. Samolyk 48887.780 2571 0.002 18 R. Hill 49237.593 2716 0.010 11 G. Samolyk 49278.595 2733 0.001 18 G. Samolyk 50320.765 3165 -0.006 19 G. Samolyk 50320.774 3165 0.003 14 D. Williams 51466.660 : 3640 -0.023 17 R. Hill BS VUL JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 49955.655 14043 0.010 13 G. Samolyk 50006.578 14150 0.004 18 G. Samolyk 50016.565 14171 -0.005 14 G. Samolyk 50036.569 14213 0.008 15 G. Samolyk 50320.727 14810 0.012 15 G. Samolyk 50698.648 15604 0.011 15 G. Samolyk 50749.573 15711 0.007 16 G. Samolyk 51012.774 16264 -0.004 15 G. Samolyk 51054.668 16352 0.005 13 G. Samolyk 51095.604 16438 0.007 17 G. Samolyk 51156.528 16566 0.007 13 G. Samolyk 51411.642 17102 0.000 14 G. Samolyk 51452.582 17188 0.006 16 G. Samolyk 51460.679 17205 0.012 17 G. Samolyk BT VUL JD(min) HEL. CYCLE O-C N OBSERVER 2400000 + 43351.786 6966 0.007 12 G. Samolyk 43779.735 7341 0.006 14 G. Samolyk 44022.812 7554 0.007 14 G. Samolyk 44046.767 7575 -0.003 13 G. Samolyk 44474.723 7950 0.003 13 G. Samolyk 44554.607 8020 0.003 12 G. Hanson 44562.591 8027 -0.001 17 G. Hanson 45193.682 8580 0.006 13 G. Samolyk 45945.729 9239 0.002 11 D. Williams 46017.628 9302 0.006 12 G. Samolyk 47803.608 10867 0.008 14 G. Samolyk 49282.605 12163 0.009 15 G. Samolyk 51069.707 13729 -0.008 22 G. Samolyk BU VUL JD(min) STANDARD HEL. CYCLE O-C N OBSERVER ERROR 2400000 + 50692.813 30157 0.008 14 G. Samolyk 50696.793 30164 0.005 14 M. Baldwin 50748.578 30255 0.012 20 C. Stephan 51054.695 30793 0.011 19 G. Samolyk 51055.840 30795 0.018 17 M. Baldwin 51079.734 30837 0.014 17 M. Baldwin 51083.717 30844 0.014 13 M. Baldwin 51099.647 30872 0.012 11 M. Baldwin 51156.548 30972 0.014 17 G. Samolyk 51347.731 31308 0.015 9 M. Baldwin 51384.718 31373 0.018 16 G. Samolyk 51396.663 31394 0.014 13 M. Baldwin 51400.6464 31401 0.0142 A. Howell (CCD) 0.0004 51400.648 31401 0.016 15 M. Baldwin 51426.824 31447 0.018 19 M. Baldwin 51429.662 31452 0.011 18 M. Baldwin 51433.647 31459 0.013 11 M. Baldwin 51433.651 31459 0.017 15 G. Samolyk 51486.562 31552 0.012 18 G. Samolyk 51487.703 31554 0.015 18 M. Baldwin 51523.553 31617 0.018 15 M. Baldwin 51698.798 31925 0.013 18 G. Samolyk ==================================================================== END OF OBSERVED MINIMA TIMINGS NUMBER 6 ====================================================================