Beta Canis Minoris
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Minor |
| Right ascension | 07h 27m 09.04174s |
| Declination | +08° 17′ 21.5368″ |
| Apparent magnitude (V) | 2.84–2.92 |
| Characteristics | |
| Spectral type | B8 Ve |
| U−B color index | −0.28 |
| B−V color index | −0.09 |
| Variable type | γ Cas + SPBe |
| Astrometry | |
| Radial velocity (Rv) | +22 km/s |
| Proper motion (μ) | RA: −51.76±0.21 mas/yr Dec.: −38.29±0.14 mas/yr |
| Parallax (π) | 20.17±0.20 mas |
| Distance | 162 ± 2 ly (49.6 ± 0.5 pc) |
| Absolute magnitude (MV) | −0.59 |
| Details | |
| Mass | 3.64±0.02 M☉ |
| Radius | 4.12+0.15 −0.13 (equatorial) 3.22 (polar) R☉ |
| Luminosity | 240 L☉ |
| Surface gravity (log g) | 3.51 cgs |
| Temperature | 11,772 K |
| Rotational velocity (v sin i) | 210 km/s |
| Age | 160+20 −60 Myr |
| Other designations | |
| Gomeisa, Algomeyla, Gomelza, 3 Canis Minoris, BD+08°1774, FK5 285, HD 58715, HIP 36188, HR 2845, IRAS 07244+0823, SAO 115456 | |
| Database references | |
| SIMBAD | data |
Beta Canis Minoris (β Canis Minoris, abbreviated Beta CMi, β CMi), also named Gomeisa /ɡɒˈmaɪzə/, is a star in the constellation of Canis Minor. In the night sky it is notable for its proximity to the prominent star Procyon.