Global InformationXi Mensae information
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Mensa |
| Right ascension | 04h 58m 50.96791s[1] |
| Declination | −82° 28′ 13.8521″[1] |
| Apparent magnitude (V) | 5.84[2] |
| Characteristics | |
| Spectral type | G8/K0III[3] |
| B−V color index | 0.932±0.006[2] |
| Astrometry | |
| Radial velocity (Rv) | −4.7±0.2[1] km/s |
| Proper motion (μ) | RA: −4.701±0.091[1] mas/yr Dec.: +2.648±0.107[1] mas/yr |
| Parallax (π) | 9.6939 ± 0.0535 mas[1] |
| Distance | 336 ± 2 ly (103.2 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.57[2] |
| Details | |
| Mass | 1.91[4] M☉ |
| Radius | 8.97+0.22 −0.55[1] R☉ |
| Luminosity | 50.3±0.4[1] L☉ |
| Surface gravity (log g) | 3.02[5] cgs |
| Temperature | 5,131+166 −60[1] K |
| Metallicity [Fe/H] | 0.06[5] dex |
| Age | 281[4] Myr |
| Other designations | |
ξ Men, CPD−82° 106, FK5 917, HD 34172, HIP 23148, HR 1716, SAO 258395[6] | |
| Database references | |
| SIMBAD | data |
ξ Mensae, Latinized as Xi Mensae, is a single[7] star in the southern circumpolar constellation of Mensa. It has a yellow-orange hue and is just barely visible to the naked eye as a dim point of light with an apparent visual magnitude of 5.84.[2] This object is located about 366 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −5 km/s.[1]
This object is an aging giant star with a stellar classification of G8/K0III.[3] It is 281[4] million years old with 1.91[4] times the mass of the Sun. The star displays micro-variability, fluctuating in brightness by 0.0049 magnitudes with a period of 148 days.[8] With the supply of hydrogen at its core exhausted, the star has cooled and expanded to nine[1] times the Sun's radius. It is radiating 50 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 5,131 K.[1]
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