Pi Mensae
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Mensa |
| Right ascension | 05h 37m 09.88684s |
| Declination | −80° 28′ 08.8346″ |
| Apparent magnitude (V) | +5.65 |
| Characteristics | |
| Spectral type | G0 V |
| U−B color index | 0.11 |
| B−V color index | 0.60 |
| V−R color index | 0.31 |
| R−I color index | 0.29 |
| Astrometry | |
| Radial velocity (Rv) | 10.71±0.12 km/s |
| Proper motion (μ) | RA: 310.909 mas/yr Dec.: 1,049.060 mas/yr |
| Parallax (π) | 54.6825±0.0354 mas |
| Distance | 59.65 ± 0.04 ly (18.29 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.35±0.01 |
| Details | |
| Mass | 1.091±0.031 M☉ |
| Radius | 1.136±0.011 R☉ |
| Luminosity | 1.532±0.004 L☉ |
| Surface gravity (log g) | 4.365±0.007 cgs |
| Temperature | 6,013±18 K |
| Metallicity [Fe/H] | 0.09 dex |
| Rotational velocity (v sin i) | 2.96 km/s |
| Age | 3.8±0.8 Gyr |
| Other designations | |
| π Men, CD−80°195, CPD−80°161, GJ 9189, HD 39091, HIP 26394, HR 2022, SAO 258421, LFT 429, LHS 208, LTT 2359, TOI-144 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Pi Mensae (π Men), also known as HD 39091, is a G-dwarf star 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.