RS Coronae Borealis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Corona Borealis[1] |
| Right ascension | 15h 58m 30.764s[2] |
| Declination | +36° 01′ 19.72″[2] |
| Apparent magnitude (V) | 8.7-11.6[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M7[3] |
| Astrometry | |
| Proper motion (μ) | RA: −51.649[2] mas/yr Dec.: −0.161[2] mas/yr |
| Parallax (π) | 3.0363±0.0272 mas[2] |
| Distance | 1,074 ± 10 ly (329 ± 3 pc) |
| Absolute magnitude (MV) | −0.21[1] |
| Other designations | |
| RS CrB, BD+36°2672, HD 143347, HIP 78235, SAO 64995[5] | |
| Database references | |
| SIMBAD | data |
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). It varies between magnitudes 8.7 to 11.6 over 332 days.[3] It is unusual in that it is a red star with a high proper motion (greater than 50 milliarcseconds a year).[7] 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.[8]
In 1907 it was announced that Henrietta Swan Leavitt had discovered the star, then called BD+36°2672, is a variable star.[9] It was given its variable star designation, RS Coronae Borealis, in 1910.[10]
References
[edit]- ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c Watson, Christopher (4 January 2010). "RS Coronae Borealis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 25 July 2015.
- ^ Hinkle, Kenneth H.; Lebzelter, Thomas; Joyce, Richard R.; Fekel, Francis C. (2002). "Velocity Observations of Multiple-Mode Asymptotic Giant Branch Variable Stars". The Astronomical Journal. 123 (2): 1002. Bibcode:2002AJ....123.1002H. doi:10.1086/338314.
- ^ "RS Coronae Borealis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-04-08.
- ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
