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Name
  U Cyg  
AAVSO UID
000-BCL-341 (52197 observations)  
Constellation
Cygnus Sequence
J2000.0
20 19 36.60 +47 53 39.0  (304.90250 +47.89417) Search nearby
B1950.0 20 18 03.48 +47 44 08.3
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
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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
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1 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
2 T. Karlsson, Maxima of Mira stars --
3 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.		 --
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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.
4 Otero, Sebastian Alberto 2024-01-19 03:56 UTC Period and range from AAVSO data.
3 Fernig, Leo 2022-04-22 13:36 UTC Discoverer updated from 1907AnHar..55....1C page 28
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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