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Latest Details
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Name
  V0439 Cyg  
AAVSO UID
000-BDC-281 (1079 observations)  
Constellation
Cygnus Sequence
J2000.0
20 21 33.59 +37 24 51.7  (305.38996 +37.41436) Search nearby
B1950.0 20 19 41.55 +37 15 14.7
Proper motion
RA: -4.0 +/- 6.4 mas/yDec: -1.7 +/- 5.9 mas/ySource: UCAC4
Galactic coord. 75.738 +0.354
Other names

(Internal only)
AN 537.1936 ASASSN-V J202133.54+372452.5 EM* AS 407
Hen 3-1887 MHA 328-74 MWC 1015
X 20197+372    
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Variability type
SDOR:
Spectral type B0pe
Mag. range
12.7 - 13.38 B
Discoverer --
Epoch
--
Outburst --
Period 260 d
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto LBV candidate not an ordinary Be star. V= 11.84; B-V= 1.54 (GCPD)
2 GCVS Team In the region of the open cluster Berkeley 87 = OCL 161.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Chandra Detects the Rare Oxygen-type Wolf-Rayet Star WR 142 and OB Stars in
Berkeley 87		 The Astrophysical Journal, 715, 1327 (2010)
2 G.Romano, Padova Publ N156, 1969. --
3 MVS N270, 1957. --
External Links
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Location    Go   
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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 = 8.53H = 8.01K = 7.59J - K = 0.94
AllWISE W1 = 6.88W2 = 6.67W3 = 5.18W4 = 2.17W1 - W2 = 0.21W3 - W4 = 3.00
APASS-DR9 B = 13.44V = 11.88g' = 12.65r' = 11.20i' = 10.38B - V = 1.56
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 21 33.59 +37 24 51.7 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Stellar Association Membership
 Berkeley 87 Open Cluster 2012A&A...548A..97Z
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Otero, Sebastian Alberto 2010-10-12 01:35 UTC New possible type.
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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