RS Coronae Borealis

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

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]

In 1907 it was announced that Henrietta Swan Leavitt had discovered the star, then called BD +36° 2672, is a variable star.[6] It was given its variable star designation, RS Coronae Borealis, in 1910.[7]

References

  1. ^ a b c d SIMBAD, RS Coronae Borealis (accessed 20 February 2013)
  2. ^ a b 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.
  6. ^ Leavitt, Henrietta S.; Pickering, Edward C. (October 1907). "15 New Variable Stars in Harvard Maps, Nos. 15, 18, and 27". Harvard College Observatory Circular. 133: 1–2. Bibcode:1907HarCi.133....1L. Retrieved 16 December 2024.
  7. ^ Dunér, Nils Christofer; Hartwig, Ernst; Müller, G. (November 1910). "Benennung von neu entdeckten veränderlichen Sternen". Astronomische Nachrichten. 186 (17): 273–286. Bibcode:1910AN....186..273D. doi:10.1002/asna.19101861702. Retrieved 16 December 2024.


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