Alpha Corvi
Alpha Corvi (α Corvi, abbreviated Alpha Crv, α Crv), also named Alchiba /ˈælkɪbə/, is an F-type main-sequence star and the fifth-brightest star in the constellation of Corvus. Based on parallax measurements made during the Hipparcos mission, it is approximately 49 light-years from the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Corvus |
| Right ascension | 12h 08m 24.81652s |
| Declination | −24° 43′ 43.9504″ |
| Apparent magnitude (V) | 4.03 |
| Characteristics | |
| Spectral type | F1 V + M4 V |
| U−B color index | +0.00 |
| B−V color index | +0.34 |
| Variable type | γ Dor? |
| Astrometry | |
| Radial velocity (Rv) | +3.0 km/s |
| Proper motion (μ) | RA: 99.52 mas/yr Dec.: −39.19 mas/yr |
| Parallax (π) | 66.95 ± 0.15 mas |
| Distance | 48.7 ± 0.1 ly (14.94 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.25 |
| Details | |
| Mass | 1.39 M☉ |
| Luminosity | 4.91 L☉ |
| Surface gravity (log g) | 4.13 ± 0.05 cgs |
| Temperature | 7,041 ± 53 K |
| Metallicity [Fe/H] | −0.19 ± 0.04 dex |
| Rotational velocity (v sin i) | 16.9 ± 1.5 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
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