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Name
  VW Cep  
AAVSO UID
000-BCM-001 (18478 observations)  
Constellation
Cepheus Sequence
J2000.0
20 37 21.50 +75 36 01.0  (309.33958 +75.60028) Search nearby
B1950.0 20 38 07.49 +75 25 24.3
Galactic coord. 109.224 +20.058
Other names

(Internal only)
1RXS J203719.4+753554 AAVSO 2038+75 BD+75 752
G 261-28 GJ 1255 GJ 1255.0 AB
GJ 9703 HD 197433 HIP 101750
IRAS 20381+7525 LTT 16039 NLTT 49671
PPM 10614 RX J2037.2+7535 SAO 9828
TYC 4585-3284-1 WDS J20374+7536AB X 20380+754
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Variability type
EW/KW
Spectral type G5+K0Ve
Mag. range
7.23 - 7.68 V
Discoverer --
Epoch
10 Oct 1979 (HJD 2444157.4131) Ephemeris
Outburst --
Period 0.2783146 d  (6.67955 h)
Rise/eclipse dur. --
Remarks
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1 GCVS Team VB A (B 10.3m, a = 0.51", P = 30.45a [J.L.Hershey, AJ 80, 662, 1975.]); mu alpha = +0.0899s, mu delta = +0.560". Min II 7.56. Shape of the light curve and depths of Min I and Min II vary. P var. Min I = 2433483.4257 + 0.27831758d*E + 0.050d*cos(0.004813deg*(E - 4700)) (JD2424763 - 41200) [I.Todoran, V.Pop, AA 22, N3, 267, 1972.]; since JD2441000 - see Table. Period change study see also in [A.P.Linnell, PASP 92, 202, 1980.]. X-ray source.
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References
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1 Bob Nelson's O-C files, 2016 --
2 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
3 J.M.Kreiner, M.Winiarski, AA 31, N3, 351, 1981. 1981AcA....31..351K
4 L.Sorgsepp, Kh.Albo, Tartu Publ 42, 103, 1974. --
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2016-06-01 20:31 UTC Epoch from Bob Nelson's O-C files (2014). Period from AAVSO data. Range from HIPPARCOS and AAVSO V data.
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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