HD 27022

HD 27022
Location of HD 27022 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 20m 40.32564s[1]
Declination +65° 08′ 25.5893″[1]
Apparent magnitude (V) +5.27[2]
Characteristics
Spectral type G4 III[3] or G5 IIb[4]
U−B color index +0.47[2]
B−V color index +0.81[2]
Astrometry
Radial velocity (Rv)−19.47±0.21[5] km/s
Proper motion (μ) RA: −28.439 mas/yr[1]
Dec.: −4.4856 mas/yr[1]
Parallax (π)9.4068 ± 0.0643 mas[1]
Distance347 ± 2 ly
(106.3 ± 0.7 pc)
Absolute magnitude (MV)+0.31[6]
Details
Mass2.88[7] M☉
Radius10.71+0.23
−1.06[8] R☉
Luminosity75.9[9] L☉
Surface gravity (log g)3.10±0.21[10] cgs
Temperature5,425±33[11] K
Metallicity [Fe/H]0.03±0.05[10] dex
Rotational velocity (v sin i)0.5±1.4[12] km/s
Age444±60[7] Myr
Other designations
20 H. Camelopardalis,[13] AG+65°247, BD+64°433, FK5 2315, GC 5199, HD 27022, HIP 20266, HR 1327, SAO 13098[14]
Database references
SIMBADdata

HD 27022, also known as HR 1327, is a star located in the northern circumpolar constellation Camelopardalis. The object has also been designated as 20 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.27,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the star has been estimated to be 347 light years away.[1] It appears to be approaching the Solar System, having a heliocentric radial velocity of −19.5 km/s.[5]

This is a solitary,[15] yellow giant with a stellar classification of G4 III.[3] It has alternatively been classified as G5 IIb wk,[4] indicating a bright giant with weak lines. HD 27022 is currently on the horizontal branch located on the warm end of the red clump,[16] a region of the said branch filled with metal-rich giant stars. It has 2.88 times the mass of the Sun but at the age of 444 million years,[7] it has expanded to 10.71 times its girth.[8] It radiates 75.9 times the luminosity of the Sun[9] from its enlarged photosphere at an effective temperature of 5,425 K.[11] Like most giants, it spins rather slowly, having a projected rotational velocity of 1⁄2 km/s.[12] Kinematically, it belongs to the halo of the Ursa Major moving group.[17]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Keenan1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Keenan1980 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Soubrian2008 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Feltzing2001 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference daSilva2015 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Gray1986 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Verbunt2010 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Alves2000 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Chupina2006 was invoked but never defined (see the help page).