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Latest Details
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Name
  2MASS J21315777+5111459  
AAVSO UID
000-BKG-471 (916 observations)  
Constellation
Cygnus Sequence
J2000.0
21 31 57.78 +51 11 45.9  (322.99073 +51.19609) Search nearby
B1950.0 21 30 14.19 +50 58 28.4
Proper motion
RA: -14.1 +/- 4.8 mas/yDec: -10.5 +/- 4.8 mas/ySource: UCAC4
Galactic coord. 94.304 -0.236
Other names

(Internal only)
ASASSN-V J213157.78+511146.0 USNO-B1.0 1411-0396746 VSX J213157.7+511146
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Variability type
EW
Spectral type F5
Mag. range
15.400 - 15.513 CV
Discoverer Enrique de Miguel (CBA, Spain)
Epoch
23 Oct 2010 (HJD 2455493.3916) Ephemeris
Outburst --
Period 0.421708 d  (10.1210 h)
Rise/eclipse dur. --
Remarks
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References
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1 Qian, S.-B.; Zhu, L.-Y.; Liu, L.; et al., 2020, Contact binaries at
different evolutionary stages		 2020RAA....20..163Q
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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 = 13.33H = 12.91K = 12.73J - K = 0.60
AllWISE W1 = 12.55W2 = 12.71W1 - W2 = -0.16
APASS-DR9 B = 16.57V = 15.44g' = 16.02r' = 15.04i' = 14.56B - V = 1.12
SDSS-DR12 u = 18.04g = 16.23r = 15.27i = 14.80z = 14.52u - g = 1.81r - i = 0.47
Images
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Supporting Documents
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1 Phased light curve 2MASS J21315777+5111459 de Miguel , Enrique 2011-11-19 00:43 UTC Phased and binned light curve. Differential photometry carried out using GSC 03602-00568 (V=12.34) as comparison star.
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Revision History
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2 Otero, Sebastian Alberto 2023-04-23 16:25 UTC Spectral type from 2020RAA....20..163Q.
1 de Miguel , Enrique 2011-11-19 02:02 UTC Initial submission.

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