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Name
  W Cyg  
AAVSO UID
000-BCP-079 (98310 observations)  
Constellation
Cygnus Sequence
J2000.0
21 36 02.50 +45 22 28.5  (324.01042 +45.37458) Search nearby
B1950.0 21 34 08.32 +45 08 59.9
Proper motion
RA: 65.17 +/- 0.42 mas/yDec: 1.74 +/- 0.30 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 90.862 -4.984
Other names

(Internal only)
AAVSO 2132+44 BD+44 3877 HD 205730
HIP 106642 HR 8262 IRC +50386
SAO 51079 TYC 3591-3422-1  
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Variability type
SRB
Spectral type M4e-M6e(Tc:)III
Mag. range
5.10 - 6.83 V
Discoverer John Gore (1885)
Epoch
18 Nov 1992 (HJD 2448945.0) Ephemeris
Outburst --
Period 131.7 d
Rise/eclipse dur. 50%  (66 d)
Remarks
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1 Otero, Sebastian Alberto Other period 260 d.
2 GCVS Team There is a second oscillation with P = 235.3d.
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References
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1 Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves
and Periods		 2001PASP..113..983P
2 Photometry and Spectrophotometry of Long-Period Variables. 1964ApJS....9..141S
3 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
4 I.A.Klyus, Astron. Tsirk. N1070, 1979. --
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = -0.20H = -1.14K = -1.41J - K = 1.21
AllWISE W3 = -1.80W4 = -2.85W3 - W4 = 1.06
Images
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Supporting Documents
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2 Historical light curve Otero, Sebastian Alberto 2011-08-20 00:38 UTC Light curve with all the data available from the literature.
1 Phase plot Otero, Sebastian Alberto 2011-08-20 00:35 UTC Phase plot with data from the literature.
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Campaigns/Programs
 Binocular program
 Legacy LPV Program
 LPV Program
Revision History
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5 Fernig, Leo 2022-04-22 13:36 UTC Discoverer updated from 1907AnHar..55....1C page 30
4 Otero, Sebastian Alberto 2011-08-20 00:38 UTC Reference and JD light curve added.
3 Otero, Sebastian Alberto 2011-08-20 00:35 UTC Period, epoch and range from data available in the literature.
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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