Alpha Monocerotis
From Infogalactic: the planetary knowledge core
 Location of α Monocerotis (circled) |
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
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|---|---|
| Constellation | Monoceros |
| Right ascension | 07h 41m 14.8324s |
| Declination | –09° 33′ 04.071″ |
| Apparent magnitude (V) | 3.94[1] |
| Characteristics | |
| Spectral type | K0 III[1] |
| B−V color index | 1.022[1] |
| Astrometry | |
| Radial velocity (Rv) | +10.50[1] km/s |
| Distance | 144 ly (44.2 pc) |
| Absolute magnitude (MV) | 0.71 ± 0.08[2] |
| Details | |
| Mass | 2.02 ± 0.29[2] M☉ |
| Radius | 10.1 ± 0.5[2] R☉ |
| Surface gravity (log g) | 2.71 ± 0.09[2] cgs |
| Temperature | 4,879[2] K |
| Metallicity [Fe/H] | −0.01[2] dex |
| Rotation | 326 days[3] |
| Rotational velocity (v sin i) | 1.9[3] km/s |
| Age | 1.18 ± 0.42[2] Gyr |
| Other designations | |
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[1] and is of apparent magnitude 3.93. It is approximately 144 light years from Earth.
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