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Latest Details
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Name
  LT Del  
AAVSO UID
000-BCV-823 (880 observations)  
Constellation
Delphinus Sequence
J2000.0
20 35 57.24 +20 11 27.5  (308.98850 +20.19097) Search nearby
B1950.0 20 33 42.58 +20 01 00.9
Proper motion
RA: 5.8 +/- 2.1 mas/yDec: -3.1 +/- 2.3 mas/ySource: UCAC4
Galactic coord. 63.397 -12.150
Other names

(Internal only)
1SWASP J203557.24+201127.2 2MASS J20355722+2011275 AAVSO 2031+19
ASAS J203557+2011.4 ASAS J203557+2011.5 ASASSN-V J203557.17+201127.2
ATO J308.9884+20.1909 GALEX J203557.3+201127 GSC 01641-00951
Hen 2-467 NPM2 +20.1630 PK 063-12 1
PN ARO 353 PPMX J203557.2+201127 StHA 179
UCAC2 39053580 UCAC4 551-124855 WISE J203557.23+201127.5
WISEA J203557.23+201127.4 ZTF18abjrdfo  
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Variability type
ZAND+R+ELL
Spectral type G6III+WD
Mag. range
12.0 - 13.4 V
Discoverer James B. Kaler and Julie Haynes Lutz
Epoch
--
Outburst --
Period 476 d
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Yellow symbiotic variable (1980PASP...92...81K). Outbursts were detected on 1994 August 26 (1994IAUC.6065....2P) and 2017 April 26 (ASAS-SN Sky Patrol and 2017ATel10361....1M).
2 Otero, Sebastian Alberto Reflection effect amplitude is 1.6 mag. in U, 0.7 mag. in B and 0.2 mag. in V (eJAAVSO 189). Reflection dominates in B while ellipsoidal variations dominate in Ic.
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References
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1 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
2 U. Munari; P. Ochner; S. Dallaporta; et al., 2017, ATel #10361 2017ATel10361....1M
3 M. Gromadzki, J. Mikolajewska, I. Soszynski, 2013, arXiv:1312.6063
[astro-ph.SR]		 2013arXiv1312.6063G
4 Munari, U., 2012, Symbiotic Stars, eJAAVSO 189 2012JAVSO.tmp..189M
5 Arkhipova, V. P. et al., 2011, Symbiotic halo star LT Del: Phase variations
of the emission spectrum and parameters of the cool component		 2011AstL...37..343A
6 Arkhipova, V. P., Noskova, R. I., 1995, Photoelectric UBV photometry of the
peculiar emission-line star Henize 2-467		 1995AstL...21..339A
7 Passuello, R.; Saccavino, S.; Munari, U., 1994, IAU Circular No. 6065, #2 1994IAUC.6065....2P
8 Munari, U.; Buson, L. M., 1992, Studies of symbiotic stars. V. The
dust-free yellow system He 2-467		 1992A&A...255..158M
9 V.P.Arkhipova, R.I.Noskova, Astr Zh Pisma (USSR) 11,No.9,706,1985. --
10 Kaler, J. B.; Lutz, J. H., 1980, He 2-467: a yellow symbiotic star 1980PASP...92...81K
11 L.Perek, L.Kohoutek, Catalog of Galactic Planetary Nebulae,Prague,1967. 1967cgpn.book.....P
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 = 10.46H = 9.67K = 9.49J - K = 0.96
AllWISE W1 = 9.31W2 = 9.34W3 = 8.95W4 = 8.15W1 - W2 = -0.03W3 - W4 = 0.79
GALEX-DR5 FUV = 15.89NUV = 16.35FUV - NUV = -0.46
Images
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Supporting Documents
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Revision History
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6 Schmeer, Patrick 2020-04-20 13:53 UTC Spectral type from 1992A&A...255..158M. Discoverers added from 1980PASP...92...81K.
5 Otero, Sebastian Alberto 2012-05-25 23:41 UTC Reference added.
4 Otero, Sebastian Alberto 2012-05-25 23:40 UTC V-range from 1995AstL...21..339A
3 Otero, Sebastian Alberto 2012-05-25 23:22 UTC Maximum magnitude from AAVSO visual data. Orbital period and spectral type from 2011AstL...37..343A. Type from eJAAVSO 189. UCAC3 position.
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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