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Name
  DR Vul  
AAVSO UID
000-BCK-995 (350 observations)  
Constellation
Vulpecula Sequence
J2000.0
20 13 46.85 +26 45 01.6  (303.44521 +26.75044) Search nearby
B1950.0 20 11 41.23 +26 35 53.4
Proper motion
RA: -2.031 +/- 0.335 mas/yDec: -6.734 +/- 0.405 mas/ySource: Gaia DR1
Galactic coord. 65.974 -4.255
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 2009+26 AN 129.1935 ASAS J201347+2645.0
BD+26 3835 HD 339770 SAO 88380
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Variability type
EA/DM
Spectral type B8
Mag. range
8.65 - 9.27 V
Discoverer --
Epoch
20 Mar 1969 (HJD 2440300.668) Ephemeris
Outburst --
Period 2.2508645 d
Rise/eclipse dur. 15%  (8.103 h)
Remarks
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1 GCVS Team Min II 9.19; DII = 0.132P. There is apsidal motion with the period 37.8 years. Elements given in the Table contain supplementary terms: -0.07165d*sin(0.05863deg*E) - 0.00269d* *sin(0.11726deg*E). Min II = 2440301.7934 + 2.2508645d*E + 0.07165d* *sin(0.05863deg*E) - 0.00269d*sin(0.11726deg*E). P var? [G.E.Erleksova, Tadj. Byull. N69-70, 33, 1980.]. The depth of minima varies.
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References
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1 Bob Nelson's O-C files, 2016 --
2 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
3 D.J.K.O'Connell, Ric Astr 8, N14, 319, 1972. 1972RA......8..319O
External Links
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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 = 8.10H = 8.13K = 8.12J - K = -0.02
AllWISE W1 = 8.20W2 = 8.23W3 = 8.35W4 = 7.73W1 - W2 = -0.04W3 - W4 = 0.62
APASS-DR9 B = 9.37V = 8.65g' = 8.93r' = 8.63i' = 8.65B - V = 0.72
Images
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Supporting Documents
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Revision History
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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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