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Name
  BD+20 307  
AAVSO UID
000-BKX-972 (253 observations)  
Constellation
Aries Sequence
J2000.0
01 54 50.34 +21 18 22.5  (28.70975 +21.30625) Search nearby
B1950.0 01 52 04.18 +21 03 41.7
Proper motion
RA: 38.497 +/- 0.109 mas/yDec: -22.585 +/- 0.066 mas/ySource: Gaia DR1
Galactic coord. 142.099 -39.194
Other names

(Internal only)
2MASS J01545034+2118225 ASASSN-V J015450.43+211822.5 GSC 01212-00207
HIP 8920 IRAS 01520+2103 PPM 91187
SAO 75016 TYC 1212-207-1  
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Variability type
RS
Spectral type G0V+G0V
Mag. range
8.99 V (0.007)(b+y)/2
Discoverer --
Epoch
24 Sep 2006 (HJD 2454003.18) Ephemeris
Outburst --
Period 3.530 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Close binary (A= 9.61V; B= 9.88V). Orbital elements: 2454506.3855 + 3.42015 d. x E.
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References
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1 Zuckerman, B., et al., 2008, Planetary Systems around Close Binary Stars:
the Case of the Very Dusty, Sun-like, Spectroscopic Binary BD+20 307
2008ApJ...688.1345Z
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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 = 7.89H = 7.67K = 7.60J - K = 0.29
AllWISE W1 = 7.41W2 = 7.29W3 = 4.08W4 = 2.96W1 - W2 = 0.12W3 - W4 = 1.13
APASS-DR9 B = 10.21
SDSS-DR12 u = 10.59g = 9.41r = 8.80i = 8.70z = 9.87u - g = 1.18r - i = 0.10
Images
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Supporting Documents
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Campaigns/Programs
 Dust Production Study in Developing Planetary Systems
Revision History
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1 Otero, Sebastian Alberto 2013-04-03 23:46 UTC Type, elements and amplitude from 2008ApJ...688.1345Z. Magnitude and position from HIPPARCOS. Spectral type from the SAO Star Catalogue and 2008ApJ...688.1345Z.