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Name
  alf CrB  
AAVSO UID
000-BBW-312 (1111 observations)  
Constellation
Corona Borealis Sequence
J2000.0
15 34 41.27 +26 42 52.9  (233.67196 +26.71469) Search nearby
B1950.0 15 32 34.19 +26 52 54.8
Proper motion
RA: 120.27 mas/yDec: -89.58 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 41.870 +53.772
Other names

(Internal only)
5 CrB 1RXS J153441.5+264252 BD+27 2512
HD 139006 HIP 76267 HR 5793
IRC +30275 SAO 83893  
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Variability type
EA/DM
Spectral type A0V+G5V
Mag. range
2.21 - 2.32 B
Discoverer --
Epoch
19 Apr 1922 (HJD 2423163.77) Ephemeris
Outburst --
Period 17.359907 d
Rise/eclipse dur. 3%
Remarks
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1 GCVS Team lambda eff = 7230 A: DI = 0.034P, DII = 0.018P, Min II - Min I = 0.66P, depth of Min I 0.10m, Min II 0.025m.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 G.E.Kron, K.C.Gordon, ApJ 118, N1, 55-76, 1953. 1953ApJ...118...55K
2 J.Mattei, E.Mayer, M.Baldwin, Sky and Tel 60, N4, 285, 1980. --
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 = 2.25H = 2.39K = 2.21J - K = 0.04
AllWISE W3 = 2.26W4 = 1.94W3 - W4 = 0.32
Images
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Supporting Documents
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Revision History
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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.