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HD 137589


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The Absolute Dimensions of the Overcontact Binary FI Bootis
UBVRCIC photometry of the W UMa eclipsing binaryFI Bootis has been obtained and analyzed simultaneously with previouslypublished photometry and radial velocities. The analysis of the lightand radial velocity curves shows that the system is an A-type W UMasystem consisting of stars with masses 0.82 and 0.31 Msolar.

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Observation and Astrometry data

Constellation:Bootes
Right ascension:15h24m50.08s
Declination:+51°12'36.9"
Apparent magnitude:8.873
Distance:98.814 parsecs
Proper motion RA:-10.7
Proper motion Dec:1.6
B-T magnitude:9.477
V-T magnitude:8.923

Catalogs and designations:
Proper Names
HD 1989HD 137589
TYCHO-2 2000TYC 3488-716-1
USNO-A2.0USNO-A2 1350-08621013
HIPHIP 75449

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