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HD 46568

HD 46568
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 06h 32m 21.3775s[1]
Declination −37° 41′ 48.2053″[1]
Apparent magnitude (V) 5.25±0.01[2]
Characteristics
Spectral type G8 III[3]
U−B color index +0.75[4]
B−V color index +0.98[5]
Astrometry
Radial velocity (Rv)39±1[6] km/s
Proper motion (μ) RA: +73.075 mas/yr[1]
Dec.: −75.599 mas/yr[1]
Parallax (π)11.4692 ± 0.0782 mas[1]
Distance284 ± 2 ly
(87.2 ± 0.6 pc)
Absolute magnitude (MV)+0.64[7]
Details[8]
Mass1.94±0.11 M☉
Radius10.66±0.18 R☉
Luminosity60.7±1.4 L☉
Surface gravity (log g)2.69±0.07 cgs
Temperature4,935±29 K
Metallicity [Fe/H]−0.16±0.02 dex
Rotational velocity (v sin i)1.2±1.2[9] km/s
Age1.68[10] Gyr
Other designations
104 G. Columbae, CD−37°2889, CPD−37°964, GC 8514, HD 46568, HIP 31165, HR 2399, SAO 196917[11][12]
Database references
SIMBADdata

HD 46568 (HR 2399) is a solitary[13] star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.25.[2] Parallax measurements place the object at a distance of 284 light years[1] and is currently receding with a heliocentric radial velocity of 39 km/s.[6]

HD 46568 has a stellar classification of G8 III, indicating that it is a yellow giant. At present it has nearly twice the mass of the Sun[8] but at an age of 1.68 billion years[10] it has expanded to 10.66 times the radius of the Sun.[8] It has an effective temperature of 4,935 K,[8] giving it a yellow glow. However, the star's large radius yields a luminosity 60 times that of Sun.[8] HD 46568's metallicity is 69% that of the Sun[8] and it spins with a poorly constrained projected rotational velocity of 1.2 km/s.[9]

  1. ^ a b c d e 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. ^ Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Paunzen2022 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Stoy1968 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 c d e f Cite error: The named reference Ottoni2022 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference DeMederios2014 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Gomes da Silva2021 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 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).
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