U Coronae Borealis

U Coronae Borealis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Borealis
Right ascension 15h 18m 11.35252s [1]
Declination +31° 38′ 49.4159″ [1]
Spectral typeB6V+F8III-IV[1]
Other designations
HD 136175, HIP 74881

U Coronae Borealis (U CrB) is an it 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[2] 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.[3]

References

  1. 1 2 3 "V Coronae Borealis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 10 March 2015.
  2. ↑ VSX (4 January 2010). "U Coronae Borealis". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
  3. ↑ Ibanoǧlu, C.; DervişoǧLu, A.; Ćakırlı, Ö.; Sipahi, E.; Yüce, K. (2012). "Carbon deficiencies in the primaries of some classical Algols". Monthly Notices of the Royal Astronomical Society. 419 (2): 1472–79. arXiv:1109.1939Freely accessible. Bibcode:2012MNRAS.419.1472I. doi:10.1111/j.1365-2966.2011.19812.x.
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