Alpha Crateris
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crater |
| Right ascension | 10h 59m 46.46516s |
| Declination | −18° 17′ 55.6304″ |
| Apparent magnitude (V) | 4.07 |
| Characteristics | |
| Evolutionary stage | red clump |
| Spectral type | K1 III |
| Astrometry | |
| Radial velocity (Rv) | 47.54±0.16 km/s |
| Proper motion (μ) | RA: −462.303 mas/yr Dec.: 128.614 mas/yr |
| Parallax (π) | 20.3693±0.1704 mas |
| Distance | 160 ± 1 ly (49.1 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.44 |
| Details | |
| Mass | 1.81 M☉ |
| Radius | 12.32 R☉ |
| Luminosity | 66.0 L☉ |
| Surface gravity (log g) | 2.53 cgs |
| Temperature | 4.691 K |
| Metallicity [Fe/H] | +0.01 dex |
| Age | 2.06 Gyr |
| Other designations | |
| 7 Crt, NLTT 25942, LTT 4040, HD 95272, BD−17°3273, HIP 53740, HR 4287, FK5 1283, SAO 156375 | |
| Database references | |
| SIMBAD | data |
Alpha Crateris (α Crateris, abbreviated Alpha Crt, α Crt), officially named Alkes /ˈælkɛs/, is a star in the constellation of Crater. It is a cool giant star about 49.1 parsecs (160 ly) away.