U Coronae Borealis

U Coronae Borealis (U CrB) is an Algol-type eclipsing binary star system in the constellation Corona Borealis. Its apparent magnitude varies between 7.66 and 8.79 over a period of 3.45 days. The component stars are a blue-white main sequence star of spectral type B6V and a cooler yellow-white subgiant star of spectral type F8III-IV.

Not to be confused with Upsilon Coronae Borealis.
U Coronae Borealis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Borealis
Right ascension 15h 18m 11.35252s
Declination +31° 38′ 49.4159″
Spectral typeB6 V + F8 III-IV
Other designations
BD+32° 2569, HD 136175, HIP 74881, SAO 64619
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