HD 36848

HD 36848
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 05h 32m 51.4130s[1]
Declination −38° 30′ 48.1306″[1]
Apparent magnitude (V) 5.46±0.01[2]
Characteristics
Evolutionary stage red giant branch[3]
Spectral type K2/3 III[4]
B−V color index +1.22[5]
Astrometry
Radial velocity (Rv)−0.6±0.1[6] km/s
Proper motion (μ) RA: +48.475 mas/yr[1]
Dec.: −10.959 mas/yr[1]
Parallax (π)18.7844 ± 0.0462 mas[1]
Distance173.6 ± 0.4 ly
(53.2 ± 0.1 pc)
Absolute magnitude (MV)+1.84[7]
Details
Mass1.18[8] M☉
Radius8.71+0.62
−0.58[9] R☉
Luminosity24.54[10] L☉
Surface gravity (log g)2.7±0.2[11] cgs
Temperature4,460±70[11] K
Metallicity [Fe/H]+0.28±0.05[11] dex
Rotational velocity (v sin i)<2.7[12] km/s
Age7.33[8] Gyr
Other designations
24 G. Columbae[13], CD−38°2085, CPD−38°653, GC 6889, HD 36848, HIP 25993, HR 1877, SAO 195948[14]
Database references
SIMBADdata

HD 36848 (HR 1877) is a star in the southern constellation Columba. It has an apparent magnitude of 5.46,[2] allowing it to be faintly seen with a naked eye. The star is relatively close at a distance of 174 light years[1] and is moving closer with a heliocentric radial velocity of only −0.6 km/s.[6]

HD 36848 has a stellar classification of K2/3 III — intermediate between a K2 and 3 giant star. It is on the red giant branch,[3] meaning it has exhausted its core hydrogen and is now fusing hydrogen in a shell outside the core. It has a comparable mass to the Sun[8] but has expanded to 8.71 times the radius of the Sun[9] after 7.33 billion years.[8] It shines with a luminosity of 24.5 L☉[10] from its enlarged photosphere at an effective temperature of 4,460 K,[11] giving t an orange hue. The star is metal enriched with an iron abundance 90% greater than that of the Sun[11] and spins with a projected rotational velocity lower than 2.7 km/s.[12]

The star's multiplicity status isn't generally agreed on. Eggleton et al. classifies it as a solitary star[15] while De Mederios et al. finds it to be a probable spectroscopic binary.[12]

  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. ^ a b Cite error: The named reference setiawan2004 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Jofré2015 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 Cite error: The named reference Dotter2008 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference A.P1999 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  11. ^ a b c d e Cite error: The named reference daSilva2006 was invoked but never defined (see the help page).
  12. ^ a b c Cite error: The named reference DeMed2014 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Gould1879 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).