| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Mensa |
| Right ascension | 05h 37m 09.88684s[1] |
| Declination | −80° 28′ 08.8346″[1] |
| Apparent magnitude (V) | +5.65[2] |
| Characteristics | |
| Spectral type | G0 V[3] |
| U−B color index | 0.11[2] |
| B−V color index | 0.60[2] |
| V−R color index | 0.31 |
| R−I color index | 0.29 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | 10.71±0.12[1] km/s |
| Proper motion (μ) | RA: 310.909 mas/yr[1] Dec.: 1,049.060 mas/yr[1] |
| Parallax (π) | 54.6825 ± 0.0354 mas[1] |
| Distance | 59.65 ± 0.04 ly (18.29 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.35±0.01[4] |
| Details[5] | |
| Mass | 1.11±0.01 M☉ |
| Radius | 1.15±0.01 R☉ |
| Luminosity | 1.532±0.004 L☉ |
| Surface gravity (log g) | 4.35±0.01 cgs |
| Temperature | 6,013±18 K |
| Metallicity [Fe/H] | 0.09[6] dex |
| Rotational velocity (v sin i) | 2.96[6] km/s |
| Age | 3.4±0.6 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Pi Mensae (π Men), also known as HD 39091, is a G-dwarf star[3] in the constellation of Mensa. This star has a high proper motion. The apparent magnitude is 5.67, which can be visible to the naked eye in exceptionally dark, clear skies. It is nearly 60 light-years away. The star is slightly larger than the Sun in terms of mass, size, luminosity, temperature and metallicity, and is about 730 million years younger. It hosts three known planets.
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