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.[3] 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.[4]
| 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 type | B6 V + F8 III-IV[1] |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
edit- ^ a b c d "V* U CrB". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 March 2015.
- ^ Yerli, S. K.; Sarna, M. J.; Zola, S.; Smith, Robert Connon; Tovmassian, G. (July 2003). "A photometric-spectroscopic analysis and the evolutionary status of the Algol-type binary U Coronae Borealis". Monthly Notices of the Royal Astronomical Society. 342 (4): 1349–1360. Bibcode:2003MNRAS.342.1349Y. doi:10.1046/j.1365-8711.2003.06644.x.
- ^ VSX (4 January 2010). "U Coronae Borealis". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
- ^ 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:1109.1939. Bibcode:2012MNRAS.419.1472I. doi:10.1111/j.1365-2966.2011.19812.x. S2CID 119295168.