Astronomy:R Corvi
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Short description: Variable star in the constellation Corvus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Corvus[2] |
| Right ascension | 12h 19m 37.8707s[3] |
| Declination | −19° 15′ 21.862″[3] |
| Apparent magnitude (V) | 6.7 to 14.4[2] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M4.5e-M9e[2] |
| U−B color index | +0.16[5] |
| B−V color index | +1.53[5] |
| Variable type | Mira[2] |
| Astrometry | |
| Radial velocity (Rv) | −22.00[6] km/s |
| Proper motion (μ) | RA: −4.247[3] mas/yr Dec.: −8.663[3] mas/yr |
| Parallax (π) | 1.2136 ± 0.0718[3] mas |
| Distance | 2,700 ± 200 ly (820 ± 50 pc) |
| Details | |
| Mass | 3.4[7] M☉ |
| Surface gravity (log g) | 1.59[7] cgs |
| Temperature | 3,857[7] K |
| Metallicity [Fe/H] | −0.38[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
R Corvi (R Crv) is a Mira variable star in the constellation Corvus, which ranges from a magnitude of 6.7 to 14.4 with a period of approximately 317 days.[2] In the sky it appears close to Gamma Corvi and can be seen in the same binocular field.[9] Extrapolating its luminosity from its period of 317 days yields a distance of 810 parsecs.[4]
Franciszek Karliński discovered that the star's brightness varies, in 1867.[10]
References
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 2.4 VSX (4 January 2010). "R Corvi". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10671. Retrieved 24 May 2014.
- ↑ 3.0 3.1 3.2 3.3 3.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 4.0 4.1 Whitelock, Patricia A.; Feast, Michael W.; Van Leeuwen, Floor (2008). "AGB variables and the Mira period-luminosity relation". Monthly Notices of the Royal Astronomical Society 386 (1): 313. doi:10.1111/j.1365-2966.2008.13032.x. Bibcode: 2008MNRAS.386..313W.
- ↑ 5.0 5.1 Myers, J. R.; Sande, C. B.; Miller, A. C.; Warren, W. H., Jr.; Tracewell, D. A. (2015). "VizieR Online Data Catalog: SKY2000 Master Catalog, Version 5 (Myers+ 2006)". Vizier Online Data Catalog. Bibcode: 2015yCat.5145....0M.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 7.0 7.1 7.2 7.3 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ "R Crv". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=R+Crv.
- ↑ Garfinkle, Robert A. (1997), Star-Hopping: Your Visa to Viewing the Universe, Cambridge University Press, p. 108, ISBN 0-521-59889-3, https://books.google.com/books?id=40JzBYGREL0C&pg=PA108
- ↑ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1-94.
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