AO Mensae

AO Mensae

A visual band light curve for AO Mensae, adapted from Kiraga (2012)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Mensa
Right ascension 06h 18m 28.20850s[2]
Declination −72° 02′ 41.4464″[2]
Apparent magnitude (V) 9.96 to 10.18[3]
Characteristics
Spectral type K4Ve[4]
B−V color index +1.13[5]
Variable type BY Dra[3]
Astrometry
Radial velocity (Rv)+16.2±1.0[6] km/s
Proper motion (μ) RA: −7.908[2] mas/yr
Dec.: +74.295[2] mas/yr
Parallax (π)25.4695 ± 0.0254 mas[2]
Distance128.1 ± 0.1 ly
(39.26 ± 0.04 pc)
Absolute magnitude (MV)7.02[7]
Details[6]
Mass0.69 M☉
Radius0.91±0.29[8] R☉
Luminosity0.26 L☉
Surface gravity (log g)4.38 cgs
Temperature4,384±59 K
Metallicity [Fe/H]0.24 dex
Rotation2.673 d
Rotational velocity (v sin i)16.4 km/s
Age23±3[9] Myr
Other designations
AO Men, CD−71°333, CPD−71° 427, HD 45081, HIP 29964[10]
Database references
SIMBADdata

AO Mensae is a single[8] variable star in the southern circumpolar constellation of Mensa. It is too faint to be viewed with the naked eye, having an apparent visual magnitude that ranges from 9.96 down to 10.18.[3] The star is 128 light years distant from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +16 km/s.[6] It is a member of the Beta Pictoris moving group, a loose association of young stars moving through the galaxy.[8]

This is an orange-hued K-type main-sequence star with a stellar classification of K4Ve,[4] where the 'e' suffix indicates emission features in the spectrum. It is young star and an X-ray source, one of the brightest such X-ray emitters in the solar neighborhood,[11] and is categorized as a BY Draconis variable, although there is some uncertainty in this assignment.[3] It is spinning with a period of 2.7[6] days and is about 23[9] million years old. The star has 69%[6] of the mass of the Sun and 91%[8] of the Sun's radius. It is radiating 26% of the luminosity of the Sun on average, at an effective temperature of 4,384 K.

  1. ^ Cite error: The named reference Kiraga was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Torres2006 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Messina2010 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Luck2018 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Messina2017 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Meshkat2017 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Makarov2003 was invoked but never defined (see the help page).