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Detail Sheet Get help for this listing
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Name
Variable   SS Cyg  
AAVSO UID
000-BCP-220  
Const. Cygnus
J2000.0
21 42 42.79 +43 35 09.9  (325.67829 +43.58608) Search nearby
B1950.0 21 40 44.93 +43 21 22.4
Other names

(Internal only)
AAVSO 2138+43 BD+42 4189 Downes SS Cyg
HD 206697 HV 84 X 21407+433
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Var. type UGSS
Spec. type K5V+pec(UG)
Mag. range 7.7 - 12.4 V
Discoverer Louisa D. Wells, 1896
Original ref. J.A.Mattei, JRAS Can 74, N5, 317- 320, 1980.
Chart ref. F.Lenouvel, J.Daguillon, JO 39, N1, 9, 1956.
Epoch --
Outburst --
Period 0.2751300
Rise dur. --
Remarks
(Original) 		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 Admin, VSX 2009-10-08 22:29 UTC S. Scaringi et al., 2009, arXiv:0910.0954v1
[astro-ph.GA] 		2009arXiv0910.0954S
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Revision History Get help for this listing
Currently approved revision is checked. All other subsequent revisions are not yet approved.
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.

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