HD 43899

HD 43899
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 06h 17m 01.23139s[1]
Declination −37° 44′ 14.8056″[1]
Apparent magnitude (V) 5.53±0.01[2]
Characteristics
Evolutionary stage red clump[3]
Spectral type K2 III[4]
U−B color index +1.11[5]
B−V color index +1.14[5]
Astrometry
Radial velocity (Rv)66.5±4.3[6] km/s
Proper motion (μ) RA: +1.657 mas/yr[1]
Dec.: +83.920 mas/yr[1]
Parallax (π)11.4725 ± 0.0449 mas[1]
Distance284 ± 1 ly
(87.2 ± 0.3 pc)
Absolute magnitude (MV)+0.73[7]
Details
Mass1.15±0.10[3] M☉
Radius12.38[8] R☉
Luminosity61+2.6
−5.0[1] L☉
Surface gravity (log g)2.04±0.24[3] cgs
Temperature4,686±122[9] K
Metallicity [Fe/H]−0.12±0.08[3] dex
Rotational velocity (v sin i)2.9±1[10] km/s
Age6.32±1.68[3] Gyr
Other designations
86 G. Columbae[11], CD−37°2707, CPD−37°890, GC 8075, HD 43899, HIP 29842, HR 2263, SAO 196653[12]
Database references
SIMBADdata

HD 43899, also designated as HR 2263, is a solitary,[13] orange hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.53,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 284 light years distant.[1] It appears to be rapidly receding with a heliocentric radial velocity of 66.5 km/s.[6] Eggen (1993) lists HD 43899 as an old disk star[14] and its kinematics match with that of the ζ Herculis moving group.[15]

HD 43899 is an evolved giant star that is currently on the horizontal branch, a red clump star, fusing a hydrogen shell around an inert helium core.[3] It has a stellar classification of K2 III.[4] At present the object has 115% the mass of the Sun[3] and an effective temperature of 4,686 K.[9] At the age of 6.32 billion years,[3] it has already left the main sequence and now radiates 61 times the luminosity of the Sun[1] from an enlarged photosphere 12.4 times that of the sun.[8] HD 43899 has an iron abundance 24% below solar levels, making it slightly metal deficient.[3] It spins modestly with a projected rotational velocity of 2.9 km/s.[10]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 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 c d e f g h i Cite error: The named reference Gallenne2018 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Przybylski1965 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 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 Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD 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).
  14. ^ Cite error: The named reference Eggen1993 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Eggen1958 was invoked but never defined (see the help page).