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Details for Revision 3
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  SS Cyg  
000-BCP-220 (561397 observations)  
Cygnus Sequence
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)
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AAVSO 2138+43 BD+42 4189 Downes SS Cyg
HD 206697 HV 84 X 21407+433
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Variability type
Spectral type K5V+pec(UG)
Mag. range
7.7 - 12.4 V
Discoverer Louisa D. Wells, 1896
Outburst --
Period 0.2751300 d
Rise/eclipse dur. --
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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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1 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2 S. Scaringi et al., 2009, arXiv:0910.0954v1 [astro-ph.GA] 2009arXiv0910.0954S
3 R.A.Downes, 2001, PASP 113, 764 (2006 archival) 2005JAD....11....2D
4 R.A.Downes, 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. --
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Revision History
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4 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
3 Admin, VSX 2009-10-08 22:29 UTC Orbital period from [2009arXiv0910.0954S].
2 Molnar, Peter 2006-08-25 22:09 UTC Added discoverer.
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.