| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Corvus |
| Right ascension | 12h08m 24.81652s[1] |
| Declination | −24° 43′ 43.9504″[1] |
| Apparent magnitude (V) | 4.03[2] |
| Characteristics | |
| Spectral type | F1 V[3] + M4 V[4] |
| U−B color index | +0.00[2] |
| B−V color index | +0.34[2] |
| Variable type | γ Dor?[5] |
| Astrometry | |
| Radial velocity (Rv) | +3.0[6] km/s |
| Proper motion (μ) | RA: 99.52[1] mas/yr Dec.: −39.19[1] mas/yr |
| Parallax (π) | 66.95 ± 0.15 mas[1] |
| Distance | 48.7 ± 0.1 ly (14.94 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.25[7] |
| Details | |
| Mass | 1.39[5] M☉ |
| Luminosity | 4.91[8] L☉ |
| Surface gravity (log g) | 4.13 ± 0.05[9] cgs |
| Temperature | 7,041 ± 53[9] K |
| Metallicity [Fe/H] | −0.19 ± 0.04[9] dex |
| Rotational velocity (v sin i) | 16.9 ± 1.5[10] km/s |
| Other designations | |
Alchiba, Al Minliar al Ghurab, Al Chiba, 1 Crv, CD −24° 10174, GCTP 2796.00, GJ 455.3, HD 105452, HIP 59199, HR 4623, SAO 180505[11] | |
| Database references | |
| SIMBAD | data |
Alpha Corvi (α Corvi, abbreviated Alpha Crv, α Crv), also named Alchiba /ˈælkɪbə/,[12] is an F-type main-sequence star and the fifth-brightest star in the constellationofCorvus. Based on parallax measurements made during the Hipparcos mission, it is approximately 49 light-years from the Sun.[1]
α Corvi (LatinisedtoAlpha Corvi) is the star's Bayer designation.
It bore the traditional names Al Chiba (Arabic: ألخبا al-xibā, 'tent') and Al Minliar al Ghurab (Arabic منقار الغراب al-manxar al-ghurab)[13]orMinkar al Ghurab. The latter appeared in the catalogue of stars in the CalendariumofAl Achsasi al Mouakket, which was translated into LatinasRostrum Corvi, 'beak of the crow'.[14] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[15] to catalogue and standardize proper names for stars. The WGSN approved the name Alchiba for this star on 12 September 2016 and it is now so included in the List of IAU-approved Star Names.[12]
InChinese astronomy, Alchiba is called 右轄, Pinyin: yòuxiá, meaning 'right linchpin', because it stands alone in the 'right linchpin' asterism, Chariot mansion (see: Chinese constellations),[16] 右轄, yòuxiá was westernized into Yew Hea by R.H. Allen.[13]
USS Alchiba (AKA-6) is a former United States Navy ship.
Alchiba belongs to the spectral class F1V and has apparent magnitude +4.00. 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.[5]
Alpha Corvi has a common proper motion companion, named Alpha Corvi B, located about 3.1 arcsec away. It is a red dwarf with a spectral type of M4V.[4]
{{cite web}}: CS1 maint: postscript (link)
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