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Detail Sheet Get help for this listing
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Name
Variable   CH Cyg  
AAVSO UID
000-BCG-667  
Const. Cygnus
J2000.0
19 24 33.07 +50 14 29.1  (291.13779 +50.24142) Search nearby
B1950.0 19 23 14.24 +50 08 27.8
Other names

(Internal only)
AAVSO 1921+50 AN 24.1924 ASAS J192433+5014.5
BD+49 2999 HD 182917 HIP 95413
IRC +50294 RAFGL 2383 SAO 31632
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Var. type ZAND+SR
Spec. type M7IIIab+Be
Mag. range 5.6 - 8.49 V
Discoverer --
Original ref. L.Luud, M.Ruusalepp, J.Vennik, Tartu Publ 45, 113, 1977.
Chart ref. AAVSO Variable Star Charts, AAVSO, Cambridge, Massachusetts.
Epoch --
Outburst --
Period --
Rise dur. --
Remarks
(Original) 		Semiregular light variations with the mean cycle 97d; mean brightness varies with the cycle ~4700d [S.Gaposchkin, HA 118, N20, 1952.]. There are also a cycle 725d [L.Luud, M.Ruusalepp, J.Vennik, Tartu Publ 45, 113, 1977.], rapid oscillations (A <= 0.25m U) and flares [H.M.Johnson, J.C.Golson, ApJ 155, L91, 1969.]. It is not excluded that the system is an eclipsing one [C.Y.Shao, W.Liller, BAAS 3, N4, 1, 443, 1971.].
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Revision History Get help for this listing
Currently approved revision is checked. All other subsequent revisions are not yet approved.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.

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