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Name
Y Cyg
AAVSO UID
Constellation
J2000.0
B1950.0
20 50 03.64 +34 28 07.8
Proper motion
RA: 2.767 +/- 0.028 mas/y Dec: -15.912 +/- 0.032 mas/y Source: Gaia DR1
Galactic coord.
77.251 -6.226
Other names(Internal only)
AAVSO 2048+34
BD+34 4184
HD 198846
HIP 102999
SAO 70599
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Variability type
EA/DM
Spectral type
B0IV+B0IV
Mag. range
7.29 - 7.90 V
Discoverer
Seth Chandler (1886)
Epoch
Outburst
--
Period
2.99641 d
Rise/eclipse dur.
12% (8.6 h)
Remarks
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1
Otero, Sebastian Alberto
Eccentric system. Min II at phase 0.57-0.60. Elements= HJD 2458645.838 + 2.99636 x E.
2
GCVS Team
Min II 7.75; E = 0.1458. Apsidal motion: P = 47.6 yr. There are sinusoidal terms in the elements: +0.1391d*sin(0.06256deg*E) - 0.0076d*sin(2*(0.06256deg*E)); Min II = 2409454.9174 + 2.9963328d*E - 0.1391d*sin(0.06256deg*E) - 0.0076d*sin(2*(0.06256deg*E)).
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References
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1
Bob Nelson's O-C files, 2016
--
2
D.J.K.O'Connell, Ric Astr 8, N29, 1977.
1977RA......8..543O
3
V.P.Zessewitsch, Variable Stars and Methods of Their Studies, (in russian)
--
4
Sternberg, B., 1927, Messungen von veranderlichen Sternen in der Jahren
1927PAICU...7D...1S
5
Cannon, A. J., 1907, Second catalogue of variable stars
1907AnHar..55....1C
External Links
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O-C Gateway (name)
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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 = 7.42 H = 7.54 K = 7.56 J - K = -0.15
AllWISE
W1 = 7.66 W2 = 7.75 W3 = 7.82 W4 = 7.88 W1 - W2 = -0.08 W3 - W4 = -0.05
APASS-DR9
Images
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Supporting Documents
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Revision History
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