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Latest Details
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Name
  V2031 Cyg  
AAVSO UID
000-BDP-761 (8 observations)  
Constellation
Cygnus Sequence
J2000.0
20 23 51.01 +38 29 34.3  (305.96254 +38.49286) Search nearby
B1950.0 20 22 00.35 +38 19 49.5
Proper motion
RA: -12.338 +/- 0.059 mas/yDec: -11.117 +/- 0.064 mas/ySource: Gaia DR1
Galactic coord. 76.881 +0.601
Other names

(Internal only)
1SWASP J202351.00+382934.2 BD+38 4063 Cl* NGC 6913 HOAG 1
Cl* NGC 6913 KJ 125 Cl* NGC 6913 SAND 135 Cl* NGC 6913 TIF 10
Cl* NGC 6913 ZUG 2 GSC 03152-00040 HD 194378
HIP 100586 IOMC 3152000083 NGC 6913 10
PPM 84861 SAO 69957 TYC 3152-40-1
WDS J20238+3830A    
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Variability type
EA
Spectral type F0III
Mag. range
8.57 - 8.68 V
Discoverer --
Epoch
13 Aug 1998 (HJD 2451038.638) Ephemeris
Outburst --
Period 2.704666 d
Rise/eclipse dur. 10%
Remarks
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1 Otero, Sebastian Alberto Total primary eclipse. Min II= 8.61 V.
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References
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1 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2012arXiv1210.0821A
2 Butters, O. W.; et al., 2010, The first WASP public data release 2010A&A...520L..10B
3 C. Koen, L. Eyer, 2002, MNRAS 331, 45 2002MNRAS.331...45K
4 S.-L.Kim, S.-W.Lee, IBVS N4331, 1996. 1996IBVS.4331....1K
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 = 7.74H = 7.57K = 7.53J - K = 0.21
AllWISE W1 = 7.39W2 = 7.47W3 = 7.52W4 = 7.99W1 - W2 = -0.08W3 - W4 = -0.47
APASS-DR9 B = 9.02V = 8.58g' = 9.37r' = 8.51i' = 8.43B - V = 0.44
Images
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2015-12-03 19:39 UTC Phase plot with HIPPARCOS and SuperWASP data.
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Stellar Association Membership
 NGC 6913 Open Cluster 2012A&A...548A..97Z
Revision History
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4 Otero, Sebastian Alberto 2015-12-03 19:39 UTC Period, eclipse duration and range from HIPPARCOS and SuperWASP data.
3 Huziak, Richard 2010-09-28 22:57 UTC Add spectrum from Boeche et al. 2004A&A...415..145B and period & epoch from Boeche et al. IBVS 5237.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.