Back Alpha Mensae Afrikaans Alfa Mensae AST Alfa de la Taula Catalan Alfa Mensae Czech Alpha Mensae German Άλφα Τραπέζης Greek Alfa Mensae Spanish آلفا کوهمیز Persian Alpha Mensae French Alfa Mensae Italian
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Mensa |
| Right ascension | 06h 10m 14.47261s[1] |
| Declination | −74° 45′ 10.9585″[1] |
| Apparent magnitude (V) | 5.09[2] |
| Characteristics | |
| Spectral type | G7 V[3] + M3.5-6.5 V[4] |
| U−B color index | 0.33[5] |
| B−V color index | 0.72[5] |
| Astrometry | |
| Radial velocity (Rv) | +36.06±0.12[1] km/s |
| Proper motion (μ) | RA: +121.596[1] mas/yr Dec.: −212.411[1] mas/yr |
| Parallax (π) | 97.9158±0.0573 mas[1] |
| Distance | 33.31 ± 0.02 ly (10.213 ± 0.006 pc) |
| Absolute magnitude (MV) | 5.03[6] |
| Details[4] | |
| α Men A | |
| Mass | 0.964±0.037 M☉ |
| Radius | 0.960±0.013 R☉ |
| Luminosity | 0.81±0.02 L☉ |
| Surface gravity (log g) | 4.459±0.006 cgs |
| Temperature | 5,569±50 K |
| Metallicity [Fe/H] | 0.11±0.05 dex |
| Rotational velocity (v sin i) | 0.6±0.6 km/s |
| Age | 6.2±1.4 Gyr |
| α Men B | |
| Mass | 0.169±0.006 M☉ |
| Radius | 0.19±0.01 R☉ |
| Temperature | 3,054±44 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
α Mensae is the brightest star in the constellation Mensa. Its designation is Latinised as Alpha Mensae, while it has the proper name Hoerikwaggo.[8] At a magnitude of 5.09, it is the dimmest lucida (a constellation's brightest star) in the sky. Due to its declination, on Earth it is best visible from higher latitudes of the southern hemisphere, yet can also be seen, though low in the sky, from just north of the Equator when near its daily arc's highest point, the culmination. It is 33 light-years away from the Solar System. Alpha Mensae is a G-type main sequence star, forming a binary star system with a red dwarf companion.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
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