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Latest Details
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Name
  bet Per  
AAVSO UID
000-BBF-713 (29853 observations)  
Constellation
Perseus Sequence
J2000.0
03 08 10.13 +40 57 20.4  (47.04221 +40.95567) Search nearby
B1950.0 03 04 54.37 +40 45 52.3
Proper motion
RA: 2.99 +/- 1.42 mas/yDec: -1.66 +/- 1.22 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 148.977 -14.900
Other names

(Internal only)
26 Per 1RXS J030810.0+405727 AAVSO 0301+40
ADS 2362 A BD+40 673 HD 19356
HIP 14576 HR 936 IRC +40055
RAFGL 443 SAO 38592 X 03049+407
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Variability type
EA/SD
Spectral type B8V+G8III
Mag. range
2.09 - 3.30 V
Discoverer Geminiano Montanari (1669)
Epoch
14 Oct 2016 (HJD 2457675.72) Ephemeris
Outburst --
Period 2.867343 d
Rise/eclipse dur. 14%  (9.63 h)
Remarks
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1 Otero, Sebastian Alberto Min II= 2.15 V. Mean period between 1989 and 2013 = 2.867340 d. Period for 2012-2013 = 2.86736 d.
2 GCVS Team Multiple system (Eclipsing pair = Algol AB; Algol C 4.7m, Am, a = 0".10, Porb = 1.862a); Algol AB = ADS 2362 A (B 12.7m, 57".5, 156deg, 1920). P var. P = 2.8673442d (1784 - 1835); P = 2.8673012d (1835 - 1854); P = 2.8672775d (1854 - 1901); P = 2.8672967d (1901 - 1913); P = 2.8672506d (1913 - 1915) [T.Herczeg, Non-periodic Phenomena in Variable Stars, Budapest, 1969, P.465-470.]; Min I = 2424477.806 + 2.86730236d*E (JD2420500 - 25000); Min = 2425917.203 + 2.86732697d*E (JD2425000 - 277000); Min I = 2433194.454 + 2.86731667d*E (JD2427700 - 33600); Min I = 2433928.4944 + 2.86732442d*E (JD2433600 - 37000); Min I = 2437598.6766 + 2.86733732d*E (JD2437000 - 42200); since JD2442200 - see Table. Porb (Algol C) = 1.862a may be traced in the deviations; a period of 32a may also be real. Depth of Min I var. Variable polarization, changes in hydrogen line profiles, sometimes emissions in the spectrum. Radio source with frequent burst of different amplitude, faint X-ray source.
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References
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1 Bob Nelson's O-C files, 2016 --
2 Perryman, M. A. C., et al., 1997, The HIPPARCOS Catalogue 1997HIP...C......0E
3 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
4 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.		 --
External Links
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Location    Go   
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 1.96H = 1.95K = 1.89J - K = 0.07
AllWISE W3 = 1.90W4 = 1.78W3 - W4 = 0.12
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 03 08 10.13 +40 57 20.4 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2013-12-09 21:12 UTC Phase plot with HIPPARCOS and AAVSO data
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
8 Otero, Sebastian Alberto 2024-06-19 20:33 UTC Period and epoch from AAVSO data.
7 Otero, Sebastian Alberto 2023-08-07 21:55 UTC Period from AAVSO data.
6 Fernig, Leo 2022-02-18 22:10 UTC Discoverer updated from 1907AnHar..55....1C page 8
5 Otero, Sebastian Alberto 2021-07-03 16:12 UTC Period and epoch from AAVSO V data.
4 Otero, Sebastian Alberto 2013-12-09 21:10 UTC Range from GCPD, HIPPARCOS and AAVSO V data. Period and epoch from G. Samolyk (AAVSO) V and AAVSO visual data. Spectral type from 2010MNRAS.405.1930L.
3 Otero, Sebastian Alberto 2013-11-27 20:38 UTC Elements from Bob Nelson's O-C files.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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