HD 22676

HD 22676
Observation data
Epoch J2000      Equinox J2000
Constellation Mensa
Right ascension 03h 29m 58.8930s[1]
Declination −78° 21′ 06.6634″[1]
Apparent magnitude (V) 5.67 ± 0.01[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type G8 III[4]
U−B color index +0.65[5]
B−V color index +0.93[5]
Astrometry
Radial velocity (Rv)18.4 ± 0.1[6] km/s
Proper motion (μ) RA: −11.565[1] mas/yr
Dec.: −26.933[1] mas/yr
Parallax (π)9.8072 ± 0.0355 mas[1]
Distance333 ± 1 ly
(102.0 ± 0.4 pc)
Absolute magnitude (MV)+0.72[7]
Details
Mass2.36[8] M☉
Radius9.33[9] R☉
Luminosity58.06[10] L☉
Surface gravity (log g)3.01 ± 0.09[11] cgs
Temperature5,109 ± 32[11] K
Metallicity [Fe/H]+0.06 ± 0.03[11] dex
Rotational velocity (v sin i)3.4 ± 1[12] km/s
Age750[8] Myr
Other designations
1 G. Mensae, CPD−78° 101, HD 22676, HIP 16290, HR 1109, SAO 255998
Database references
SIMBADdata

HD 22676 (HR 1109) is a solitary[13] star in the southern circumpolar constellation Mensa. It has an apparent magnitude of 5.67, making it faintly visible to the naked eye and is currently located at a distance of 333 light years. However, it is recceding from the sun with a radial velocity of 18.4 km/s.

HD 22676 has a stellar classification of G8 III,[4] which indicates that is an evolved late G-type giant star currently on the horizontal branch, specifically the red clump region.[3] At an age of 700 million years,[8] it has expanded to 9.33 times the radius of the Sun. It has 2.36[8] times the Sun's mass and radiates at approximately 58[10] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,109[11] K, which gives it a yellow glow. HD 22676 is slightly metal enriched with an iron abundance 115%[11] that of the Sun and spins lesuirely with a projected rotational velocity of 3.6 km/s.[12]

  1. ^ a b c d e Cite error: The named reference GaiaEDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gontcharov2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Dermarque2004 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference A.P1999 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  11. ^ a b c d e Cite error: The named reference Alves2015 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference DeMed2014 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).