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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).[4] 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.[5]

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
A light curve for RS Coronae Borealis, plotted from Hipparcos data[3]
A light curve for RS Coronae Borealis, plotted from Hipparcos data[3]

References


  1. SIMBAD, RS Coronae Borealis (accessed 20 February 2013)
  2. Watson, Christopher (4 January 2010). "RS Coronae Borealis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 25 July 2015.
  3. "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  4. 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. S2CID 53404166.
  5. 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. S2CID 118665352.


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