Alpha Corvi
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Corvus |
| Right ascension | 12h 08m 24.81652s[1] |
| Declination | −24° 43′ 43.9504″[1] |
| Apparent magnitude (V) | 4.03[2] |
| Characteristics | |
| Spectral type | F1 V[3] |
| U−B color index | +0.00[2] |
| B−V color index | +0.34[2] |
| Astrometry | |
| Radial velocity (Rv) | +3.0[4] km/s |
| Proper motion (μ) | RA: 99.52[1] mas/yr Dec.: −39.19[1] mas/yr |
| Parallax (π) | 66.95 ± 0.15[1] mas |
| Distance | 48.7 ± 0.1 ly (14.94 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.25[5] |
| Details | |
| Mass | 1.39[6] M☉ |
| Luminosity | 4.91[7] L☉ |
| Surface gravity (log g) | 4.13 ± 0.05[8] cgs |
| Temperature | 7,041 ± 53[8] K |
| Metallicity [Fe/H] | −0.19 ± 0.04[8] dex |
| Rotational velocity (v sin i) | 16.9 ± 1.5[9] km/s |
| Other designations | |
Alpha Corvi (α Crv, α Corvi) is a star in the constellation Corvus. It has the traditional names Alchiba (Arabic ألخبا al-xibā "tent") or Al Minliar al Ghurab.
Al Minliar al Ghurab (Arabic منقار الغراب al-manxar al-ghurab) or Minkar al Ghurab appeared in the catalogue of stars in the Calendarium of Al Achsasi al Mouakket, which was translated into Latin as Rostrum Corvi (beak of the crow).[11]
In Chinese astronomy, Alchiba is called 右轄, Pinyin: Yòuxiá, meaning Right Linchpin, because it stands alone in the Right Linchpin asterism, Chariot mansion (see: Chinese constellation),[12] 右轄 (Yòuxiá), westernized into Yew Hea by R.H. Allen.[13]
Alchiba belongs to the spectral class F1V and has apparent magnitude +4.00. It is 48.7 ± 0.1 light years from Earth.[1] This star exhibits periodic changes in its spectrum over a three day period, which suggests it is either a spectroscopic binary or (more likely) a pulsating Gamma Doradus-type variable.[6]
In culture
USS Alchiba (AKA-6) is a former United States Navy ship.
See also
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
- 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data (SIMBAD), Bibcode:1986EgUBV........0M.
- ↑ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
- ↑ Nordström, B.; et al. (2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs", Publications of the Astronomical Society of Australia 21 (2): 129–133, Bibcode:2004PASA...21..129N, doi:10.1071/AS04013.
- ↑ Elgarøy, Øystein; Engvold, Oddbjørn; Lund, Niels (March 1999), "The Wilson-Bappu effect of the MgII K line - dependence on stellar temperature, activity and metallicity", Astronomy and Astrophysics 343: 222–228, Bibcode:1999A&A...343..222E.
- 1 2 Fuhrmann, K.; Chini, R. (2012). "Multiplicity among F-type Stars". The Astrophysical Journal Supplement 203 (2): 20. Bibcode:2012ApJS..203...30F. doi:10.1088/0067-0049/203/2/30. 30.
- ↑ 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.
- 1 2 3 Prugniel, P.; Vauglin, I.; Koleva, M. (2011). "The atmospheric parameters and spectral interpolator for the MILES stars". Astronomy & Astrophysics 531: A165. arXiv:1104.4952. Bibcode:2011A&A...531A.165P. doi:10.1051/0004-6361/201116769.
- ↑ Ammler-von Eiff, M.; Reiners, A. (2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics 542: 31, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, A116.
- ↑ "alf Crv -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2014-05-20.
- ↑ Knobel, E. B. (June 1895), "Al Achsasi Al Mouakket, on a catalogue of stars in the Calendarium of Mohammad Al Achsasi Al Mouakket", Monthly Notices of the Royal Astronomical Society 55: 429, Bibcode:1895MNRAS..55..429K, doi:10.1093/mnras/55.8.429.
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 22 日
- ↑ Allen, Richard Hinckley, Star Names — Their Lore and Meaning: Corvus.
External links
- Alpha Corvi by Professor Jim Kaler.
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