Astronomy:RR Coronae Borealis
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Short description: M3-type semiregular variable star in the constellation Corona Borealis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 15h 41m 26.22899s[2] |
| Declination | +38° 33′ 26.5958″[2] |
| Apparent magnitude (V) | 7.3 - 8.2[3] |
| Characteristics | |
| Spectral type | M5III[4] (M3 - M6[3]) |
| Variable type | SRb[3] |
| Astrometry | |
| Radial velocity (Rv) | -58.39[5] km/s |
| Proper motion (μ) | RA: 20.24[2] mas/yr Dec.: -32.44[2] mas/yr |
| Parallax (π) | 2.93 ± 0.53[2] mas |
| Distance | approx. 1,100 ly (approx. 340 pc) |
| Details | |
| Luminosity | 2,180[6] L☉ |
| Temperature | 3,309[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
RR Coronae Borealis (RR CrB, HD 140297, HIP 76844) is a M3-type 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 7.3 and 8.2 over 60.8 days.[3] Located around 1228 light-years distant, it shines with a luminosity approximately 2180 times that of the Sun and has a surface temperature of 3309 K.[6]
In 1907 it was announced that Williamina Fleming had discovered that the star, listed then as BD +39° 2901, is a variable star. She had determined that from the examination of 26 photographic plates taken from 1892 to 1907. It was given its variable star designation, RR Coronae Borealis, in 1908.[7][8][9]
References
- ↑ "Hipparcos Tools Interactive Data Access". ESA. https://www.cosmos.esa.int/web/hipparcos/interactive-data-access.
- ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL. Vizier catalog entry
- ↑ 3.0 3.1 3.2 3.3 Otero, Sebastian Alberto (15 August 2011). "RR Coronae Borealis". The International Variable Star Index. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10609. Retrieved 20 July 2014.
- ↑ Yoon, Dong-Hwan; Cho, Se-Hyung; Kim, Jaeheon; Yun, Young joo; Park, Yong-Sun (2014). "SiO and H2O Maser Survey toward Post-asymptotic Giant Branch and Asymptotic Giant Branch Stars". The Astrophysical Journal Supplement 211 (1): 15. doi:10.1088/0067-0049/211/1/15. Bibcode: 2014ApJS..211...15Y.
- ↑ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics 430: 165. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F.
- ↑ 6.0 6.1 6.2 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. doi:10.1111/j.1365-2966.2012.21873.x. Bibcode: 2012MNRAS.427..343M.
- ↑ Fleming, Williamina; Pickering, Edward C. (October 1907). "Stars Having Peculiar Spectra. 15 New Variable Stars". Harvard College Observatory Circular 132: 1–3. Bibcode: 1907HarCi.132....1F. https://articles.adsabs.harvard.edu/pdf/1907HarCi.132....1F. Retrieved 16 December 2024.
- ↑ Dunér, Nils Christofer; Hartwig, Ernst; Müller, G. (October 1908). "Benennung von neu entdeckten veränderlichen Sternen". Astronomische Nachrichten 179 (6): 85–92. doi:10.1002/asna.19081790602. Bibcode: 1908AN....179...85D. https://articles.adsabs.harvard.edu/pdf/1909AN....179...85D. Retrieved 16 December 2024.
- ↑ "RR CrB". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=10609.
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