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  RU Cyg  
000-BCP-120 (23775 observations)  
Cygnus Sequence
21 40 39.09 +54 19 28.9  (325.16287 +54.32469) Search nearby
B1950.0 21 38 58.63 +54 05 48.9
Proper motion
RA: -7.47 +/- 1.17 mas/yDec: -12.00 +/- 1.24 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 97.374 +1.207
Other names

(Internal only)
AAVSO 2137+53 ADS 15220 A BD+53 2684
HD 206483 HIP 107036 IOMC 3967000042
IRC +50390 RAFGL 2790 SAO 33654
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Variability type
Spectral type M6e-M8e
Mag. range
9.2 - 11.6 p
Discoverer --
16 Oct 1978 (HJD 2443798) Ephemeris
Outburst --
Period 233.43 d
Rise/eclipse dur. 50%  (116.715000000000 d)
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team VB A (B 12.40m V, 10", 224deg; C 11.15m V, 19", 29deg).
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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 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
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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 = 1.32H = 0.28K = -0.13J - K = 1.45
AllWISE W3 = -1.47W4 = -2.62W3 - W4 = 1.16
Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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 Legacy LPV Program
 LPV Program
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
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.