RS Coronae Borealis

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RS Coronae Borealis
Observation data
Epoch J2000.0[1]      Equinox J2000.0[1]
Constellation Corona Borealis
Right ascension 15h 58m 30.764s[1]
Declination +36° 01′ 19.73″[1]
Apparent magnitude (V) 8.7-11.6[2]
Spectral typeM7III
Other designations
RS CrB, HD 143347, HIP 78235, SAO 64995, BD+36° 2672

RS Coronae Borealis is a semiregular variable star located in the constellation Corona Borealis with a parallax of 2.93mas being a distance of 341 parsecs (1,110 ly).[1] It varies between magnitudes 8.7 to 11.6 over 332 days.[2] It is unusual in that it is a red star with a high proper motion (greater than 50 milliarcseconds a year).[3] Located around 1072 light-years distant, it shines with a luminosity approximately 1839 times that of the Sun and has a surface temperature of 3340 K.[4]


  1. 1.0 1.1 1.2 1.3 SIMBAD, RS Coronae Borealis (accessed 20 February 2013)
  2. 2.0 2.1 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  3. Jiménez-Esteban, F. M.; Caballero, J. A.; Dorda, R.; Miles-Páez, P. A.; Solano, E. (2012). "Identification of red high proper-motion objects in Tycho-2 and 2MASS catalogues using Virtual Observatory tools". Astronomy & Astrophysics 539: 12. arXiv:1201.5315. Bibcode 2012A&A...539A..86J. doi:10.1051/0004-6361/201118375.
  4. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–57. arXiv:1208.2037. Bibcode 2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.

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