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Name
  V0444 Cyg  
AAVSO UID
000-BCV-659 (674 observations)  
Constellation
Cygnus Sequence
J2000.0
20 19 32.42 +38 43 54.0  (304.88508 +38.73167) Search nearby
B1950.0 20 17 42.66 +38 34 24.3
Proper motion
RA: -2.263 +/- 0.053 mas/yDec: -3.761 +/- 0.057 mas/ySource: Gaia DR1
Galactic coord. 76.598 +1.429
Other names

(Internal only)
AAVSO 2015+38 BD+38 4010 HD 193576
HIP 100214 HV 11111 Hen 3-1877
IOMC 3151000080 SAO 69833 WR 139
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Variability type
EA/WR
Spectral type O6+WN5.5
Mag. range
7.92 - 8.22 V
Discoverer --
Epoch
31 Jul 1971 (HJD 2441164.332) Ephemeris
Outburst --
Period 4.212424 d
Rise/eclipse dur. 20%
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team In the H II region S 109. Min II 8.06; D II = 0.10P. P var. Min I = 2430856.453 + 4.21238d*E (JD2415000 - 30000) [S.Gaposchkin, HA 113, N2, 1953.]; since JD2430000 - see Table.
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References
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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)
2012arXiv1210.0821A
2 A.M.Cherepashchuk, Kh.Khaliullin, Astron. Zh. 50, N3, 516, 1973. 1973AZh....50..516C
3 Bob Nelson's O-C files, 2016 --
4 H.Schneller, Sterne 21, 173, 1941. --
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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 = 6.70H = 6.52K = 6.33J - K = 0.37
AllWISE W1 = 5.91W2 = 5.50W3 = 4.91W4 = 4.01W1 - W2 = 0.40W3 - W4 = 0.90
APASS-DR9 B = 8.29V = 7.88g' = 7.97r' = 7.67i' = 7.45B - V = 0.41
Images
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Supporting Documents
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Revision History
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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.