Alpha Monocerotis
| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| 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 a star in the equatorial constellation of Monoceros.
Alpha Monocerotis is the brightest star in the constellation Monoceros, It is nearing the end of its life. Internal changes have caused the star to puff up gas.
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.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Hekker, S. et al. (August 2006), "Precise radial velocities of giant stars. I. Stable stars", Astronomy and Astrophysics 454 (3): 943–949, arXiv:astro-ph/0604502, Bibcode:2006A&A...454..943H, doi:10.1051/0004-6361:20064946.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 da Silva, L. et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics 458 (2): 609–623, arXiv:astro-ph/0608160, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105.
- ↑ 3.0 3.1 Setiawan, J. et al. (July 2004), "Precise radial velocity measurements of G and K giants. Multiple systems and variability trend along the Red Giant Branch", Astronomy and Astrophysics 421: 241–254, Bibcode:2004A&A...421..241S, doi:10.1051/0004-6361:20041042-1.
External links
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