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Latest Details
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Name
  U Cyg  
AAVSO UID
000-BCL-341 (51165 observations)  
Constellation
Cygnus Sequence
J2000.0
20 19 36.59 +47 53 39.1  (304.90246 +47.89419) Search nearby
B1950.0 20 18 03.49 +47 44 08.3
Proper motion
RA: -2.299 +/- 0.043 mas/yDec: 2.505 +/- 0.044 mas/ySource: Gaia DR1
Galactic coord. 84.206 +6.566
Other names

(Internal only)
AAVSO 2016+47 BD+47 3077 HD 193680
HIP 100219 IRC +50324 RAFGL 2556
SAO 49477    
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Variability type
M
Spectral type C7,2e-C9,2(Npe)
Mag. range
5.9 - 12.1 V
Discoverer --
Epoch
14 Nov 1980 (HJD 2444558) Ephemeris
Outburst --
Period 463.24 d
Rise/eclipse dur. 48%  (222.355200000000 d)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team VB A (B 7.8m, 63.5", 51deg). P var. Max = 2406455 + 461.57d*E (JD2404590 - 13900); Max = 2414827 + 470.76d*E (JD2413900 - 19940); Max = 2421806 + 455.95d*E (JD2419940 - 27380); Max = 2427848 + 472.85d*E (JD2427380 - 35750); since JD2435750 - see Table.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 T. Karlsson, Maxima of Mira stars --
2 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
External Links
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Location    Go   
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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 = 2.19H = 1.03K = 0.46J - K = 1.73
AllWISE W3 = -0.89W4 = -1.47W3 - W4 = 0.58
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 19 36.59 +47 53 39.1 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Campaigns/Programs
 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.