Alpha Monocerotis
 Location of α Monocerotis (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Monoceros |
| Right ascension | 07h 41m 14.833s |
| Declination | −09° 33′ 04.07″ |
| Apparent magnitude (V) | 3.94 |
| Characteristics | |
| Spectral type | K0 III |
| B−V color index | 1.022 |
| Astrometry | |
| Radial velocity (Rv) | +10.50 km/s |
| Proper motion (μ) |
RA: −74.61 ± 0.14 mas/yr Dec.: −19.59 ± 0.10 mas/yr |
| Parallax (π) | 22.07 ± 0.18mas |
| Distance | 148 ± 1 ly (45.3 ± 0.4 pc) |
| Absolute magnitude (MV) | 0.71 ± 0.08 |
| Details | |
| Mass | 2.02 ± 0.29 M☉ |
| Radius | 10.1 ± 0.5 R☉ |
| Surface gravity (log g) | 2.71 ± 0.09 cgs |
| Temperature | 4,879 K |
| Metallicity [Fe/H] | −0.01 dex |
| Rotation | 326 days |
| Rotational velocity (v sin i) | 1.9 km/s |
| Age | 1.18 ± 0.42 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Alpha Monocerotis (α Mon, α Monocerotis) is the Bayer designation for the brightest star in the equatorial constellation of Monoceros.
It is a giant star with a stellar classification of K0 III and is of apparent magnitude 3.93. It is approximately 148 light years from Earth.
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