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Details for Revision 2
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Name
  CH Cyg  
AAVSO UID
000-BCG-667 (162069 observations)  
Constellation
Cygnus Sequence
J2000.0
19 24 33.07 +50 14 29.1  (291.13779 +50.24142) Search nearby
B1950.0 19 23 14.21 +50 08 30.4
Galactic coord. 81.858 +15.580
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1921+50 AN 24.1924 ASAS J192433+5014.5
BD+49 2999 HD 182917 HIP 95413
IRC +50294 KID 11913210 RAFGL 2383
SAO 31632    
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Variability type
ZAND+SR
Spectral type M7IIIab+Be
Mag. range
5.6 - 8.49 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team 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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References
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1 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 [astro-ph]		 2008arXiv0808.2558P
2 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 (online data)		 2008arXiv0808.2558P
3 L.Luud, M.Ruusalepp, J.Vennik, Tartu Publ 45, 113, 1977. --
4 Guthnick, P.; et al., 1924, Benennung von neu entdeckten veränderlichen
Sternen		 1924AN....223...41G
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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.
4 Fernig, Leo 2023-07-05 21:44 UTC Discoverer updated from 1924AN....223...41G page 54.
3 Otero, Sebastian Alberto 2011-11-09 05:16 UTC Minimum magnitude from AAVSO V-data.
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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