Alpha Mensae
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Mensa |
| Right ascension | 06h 10m 14.47s |
| Declination | -74° 45′ 11.0″ |
| Apparent magnitude (V) | 5.09 |
| Characteristics | |
| Spectral type | G5 V |
| U-B color index | 0.33 |
| B-V color index | 0.72 |
| V-R color index | 0.38 |
| R-I color index | 0.32 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +34.9 km/s |
| Proper motion (μ) | RA: 121.84 mas/yr Dec.: -212.80 mas/yr |
| Parallax (π) | 98.54 ± 0.45 mas |
| Distance | 33.1 ± 0.2 ly (10.15 ± 0.05 pc) |
| Absolute magnitude (MV) | 5.05 |
| Details | |
| Mass | 0.87 M☉ |
| Radius | 0.84 R☉ |
| Surface gravity (log g) | 4.59 |
| Luminosity | 0.80 L☉ |
| Temperature | 5,560 K |
| Metallicity | 102 % Sun |
| Rotation | 32 days |
| Age | ~1010 years |
| Other designations | |
Alpha Mensae is the brightest star in the constellation Mensa. It is a main sequence dwarf star only slightly smaller and cooler in temperature than the Sun. Due to the declination of this star, on Earth it is only visible from the southern hemisphere.
This star has a relatively high proper motion across the sky, and it is located about 33 light years distant from the Sun. No planetary companions have yet been discovered around this star.
