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Name
  X Cyg  
AAVSO UID
000-BCM-291 (31353 observations)  
Constellation
Cygnus Sequence
J2000.0
20 43 24.20 +35 35 16.0  (310.85083 +35.58778) Search nearby
B1950.0 20 41 26.66 +35 24 23.7
Galactic coord. 76.870 -4.263
Other names

(Internal only)
AAVSO 2039+35 BD+35 4234 HD 197572
HIP 102276 HR 7932 SAO 70423
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Variability type
DCEP
Spectral type F7Ib-G8Ib
Mag. range
5.85 - 6.91 V
Discoverer --
Epoch
17 Nov 1978 (HJD 2443830.387) Ephemeris
Outburst --
Period 16.386332 d
Rise/eclipse dur. 35%  (5.7352 d)
Remarks
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1 GCVS Team P var. Max = 2410190.86 + 16.3841d*E (JD2410100 - 23370) [J.Hellerich, AN 215, 289, 1922.]; since JD2417000 - see Table. There is a square term in the elements given in the Table: +1.01d*10**(-7)*E**2. [A/H] = 0.4.
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References
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1 T. Jayasinghe, K. Z. Stanek, C. Kochanek, et al., 2019 (in preparation) --
2 L.Szabados, Bud Mitt N77, 1981. 1981CoKon..77....1S
3 Sky and Tel 38, 202, 1969. --
4 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
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Supporting Documents
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Revision History
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3 Fernig, Leo 2022-04-22 13:36 UTC Discoverer updated from 1907AnHar..55....1C page 29
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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