Epsilon Geminorum
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 43m 55.927s |
| Declination | +25° 07′ 52.06″ |
| Apparent magnitude (V) | +3.06 |
| Characteristics | |
| Spectral type | G8 Ib |
| U−B color index | +1.46 |
| B−V color index | +1.40 |
| Astrometry | |
| Radial velocity (Rv) | +8.09±0.14 km/s |
| Proper motion (μ) | RA: −4.835 mas/yr Dec.: −11.78 mas/yr |
| Parallax (π) | 3.748±0.184 mas |
| Distance | 861+52 −39 ly (264+16 −12 pc) |
| Absolute magnitude (MV) | −4.33±0.10 |
| Details | |
| Mass | 5.29±0.04 – 8.2±0.82 M☉ |
| Radius | 130.2+5.5 −6.0 R☉ |
| Luminosity | 6,980 L☉ |
| Surface gravity (log g) | 0.76–1.38 cgs |
| Temperature | 4,591±11 K |
| Metallicity [Fe/H] | 0.15±0.07 dex |
| Rotational velocity (v sin i) | 9.08 km/s |
| Age | 100 Myr |
| Other designations | |
| Epsilon Gem, ε Gem, 27 Geminorum, FK5 254, HD 48329, HIP 32246, HR 2473, SAO 78682 | |
| Database references | |
| SIMBAD | data |
Epsilon Geminorum or ε Geminorum, formally named Mebsuta /mɛbˈsuːtə/, is a star in the constellation of Gemini, on the outstretched right 'leg' of the twin Castor. The apparent visual magnitude of +3.06 makes it one of the brighter stars in this constellation. The distance to this star is determined at 860 light-years (260 parsecs).