Nu Mensae

ν Mensae
Location of ν Mensae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Mensa
Right ascension 04h 20m 58.0721s[1]
Declination −81° 34′ 47.719″[1]
Apparent magnitude (V) 5.76±0.01[2]
Characteristics
Spectral type F0/2 III[3]
U−B color index +0.05[4]
B−V color index +0.35[4]
Astrometry
Radial velocity (Rv)9.1±2.8[5] km/s
Proper motion (μ) RA: +10.182[1] mas/yr
Dec.: +125.469[1] mas/yr
Parallax (π)18.4754 ± 0.0273 mas[1]
Distance176.5 ± 0.3 ly
(54.13 ± 0.08 pc)
Absolute magnitude (MV)+2.13[6]
Details
Mass1.69[7] M☉
Radius2.3[8] R☉
Luminosity11.5[9] L☉
Surface gravity (log g)3.94[7] cgs
Temperature6,921±139[7] K
Metallicity [Fe/H]−0.08[7] dex
Rotational velocity (v sin i)108±5[6] km/s
Age1.7[7] Gyr
Other designations
ν Mensae, 8 G. Mensae, CPD−81°115, GC 5418, HD 29116, HIP 20297, HR 1456, SAO 258378
Database references
SIMBADdata

Nu Mensae, Latinized from ν Mensae, is a solitary[10] star situated in the southern circumpolar constellation Mensa. It has an apparent magnitude of 5.76,[2] making it faintly visible to the naked eye. The star is relatively close at a distance of 176 light years[1] but is receding with a heliocentric radial velocity of 9.1 km/s.[5]

Nu Mensae has a stellar classification of F0/2 III,[3] indicating that it is a giant star with a spectrum intermediate between that of an F0 and F2 star. The star has an angular diameter of 0.41±0.03 mas,[11] and a radius 2.39 times that of the Sun at its estimated distance.[8] At present it has 169% the mass of the Sun[7] and shines at 11.5 times the luminosity of the Sun[9] at an effective temperature of 6,921 K,[7] giving it a white glow with a yellow tint. Despite an age of 1.7 billion years,[7] Nu Mensae spins rapidly with a projected rotational velocity of 108 km/s[6] and is slightly metal deficient relative to the Sun.[7]

  1. ^ a b c d e f Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Ammler2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f g h i Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference tic was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference dr2 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Lafrasse2010 was invoked but never defined (see the help page).