Xi Mensae

Xi Mensae
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]
Distance336 ± 2 ly
(103.2 ± 0.6 pc)
Absolute magnitude (MV)0.57[2]
Details
Mass1.91[4] M☉
Radius8.97+0.22
−0.55[1] R☉
Luminosity50.3±0.4[1] L☉
Surface gravity (log g)3.02[5] cgs
Temperature5,131+166
−60[1] K
Metallicity [Fe/H]0.06[5] dex
Age281[4] Myr
Other designations
ξ Men, CPD−82° 106, FK5 917, HD 34172, HIP 23148, HR 1716, SAO 258395[6]
Database references
SIMBADdata

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]

  1. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Alves2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference koen2002 was invoked but never defined (see the help page).