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Details for Revision 2
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Name
  SS Cyg  
AAVSO UID
--  
Constellation
Cygnus Sequence
J2000.0
21 42 42.80 +43 35 10.0  (325.67833 +43.58611) Search nearby
B1950.0 21 40 45.01 +43 21 24.7
Galactic coord. 90.559 -7.111
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 2138+43 BD+42 4189 Downes SS Cyg
HD 206697 HV 84 X 21407+433
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Variability type
UGSS
Spectral type K5V+pec(UG)
Mag. range
7.7 - 12.4 V
Discoverer Louisa D. Wells, 1896
Epoch
--
Outburst --
Period (49.5 d)
Rise/eclipse dur. --
Remarks
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1 GCVS Team SB2 (P = 0.27512995d [M.E.Walker, ApJ 248, 256, 1981.]). During maxima of brightness there are oscillations of light and X-ray flux with amplitudes about 0.002m V and periods changing between 7.29s and 10.90s [J.Patterson, ApJ Suppl 45, 517, 1981., R.H.Hildebrand, E.J.Spillar, R.F. Stiening, ApJ 243, 223, 1981.].
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References
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1 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
2 S. Scaringi et al., 2009, arXiv:0910.0954v1 [astro-ph.GA] 2009arXiv0910.0954S
3 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
4 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
5 J.A.Mattei, JRAS Can 74, N5, 317- 320, 1980. 1980JRASC..74..327M
6 F.Lenouvel, J.Daguillon, JO 39, N1, 9, 1956. 1956JO.....39....1L
7 T. Köhl, AN 196, 145, 1913. 1913AN....196..145K
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Supporting Documents
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6 Otero, Sebastian Alberto 2020-09-15 08:29 UTC Gaia DR2 position.
5 Billiaert, Bruno 2015-12-06 00:31 UTC added reference
4 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
3 Admin, VSX 2009-10-09 02:29 UTC Orbital period from [2009arXiv0910.0954S].
2 Molnar, Peter 2006-08-26 02:09 UTC Added discoverer.
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.

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