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Name
  EW Del  
AAVSO UID
000-BDQ-154 (45 observations)  
Constellation
Delphinus Sequence
J2000.0
20 16 31.19 +15 41 56.9  (304.12996 +15.69914) Search nearby
B1950.0 20 14 12.93 +15 32 38.9
Proper motion
RA: 14.2 +/- 4.7 mas/yDec: -2.7 +/- 4.8 mas/ySource: UCAC4
Galactic coord. 56.966 -10.803
Other names

(Internal only)
2MASS J20163119+1541568 ASASSN-V J201631.16+154156.9 SON 4497
USNO-A2.0 1050-17070738    
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Variability type
EW
Spectral type --
Mag. range
14.7 - 15.4 p
Discoverer --
Epoch
21 Aug 1985 (HJD 2446298.566) Ephemeris
Outburst --
Period 0.488068 d  (11.7136 h)
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Elements HJD 2430613.670 + 0.392331 d. x E in 2013OEJV..160....1H.
2 K. Haeussler, 2013, Minutes on Variable Stars 13-02 Period variable. MinII = 15.2p.
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References
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1 Bob Nelson's O-C files, 2016 --
2 K. Honková; J. Jurysek; M. Lehký; et al., 2013, OEJV #160 2013OEJV..160....1H
3 K. Haeussler, 2013, Minutes on Variable Stars 13-02 --
4 H.Huth, VSS 4, N2, 1957. --
5 MVS N308, 1957. --
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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 = 12.73H = 12.37K = 12.23J - K = 0.50
AllWISE W1 = 12.43W2 = 12.47W3 = 12.16W1 - W2 = -0.04
APASS-DR9 B = 15.13V = 14.27g' = 14.68r' = 14.05i' = 13.77B - V = 0.86
Images
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Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2016-04-26 08:21 UTC UCAC4 position.
3 Admin, VSX 2014-01-01 21:20 UTC Update from [K. Haeussler, 2013, Minutes on Variable Stars 13-02].
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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