HD 46815

HD 46815
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 06h 33m 49.4800s[1]
Declination −36° 13′ 55.2951″[1]
Apparent magnitude (V) 5.40±0.01[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.72[4]
B−V color index +1.42[4]
Astrometry
Radial velocity (Rv)32.2±2.8[5] km/s
Proper motion (μ) RA: −15.622 mas/yr[1]
Dec.: +99.481 mas/yr[1]
Parallax (π)7.9846 ± 0.0528 mas[1]
Distance408 ± 3 ly
(125.2 ± 0.8 pc)
Absolute magnitude (MV)+0.03[6]
Details
Mass1.17[7] M☉
Radius24.15[8] R☉
Luminosity180±2[9] L☉
Surface gravity (log g)1.68[7] cgs
Temperature4,297±122[8] K
Metallicity [Fe/H]+0.08[10] dex
Rotational velocity (v sin i)2.3±1.2[11] km/s
Other designations
106 G. Columba, CD−36°2990, CPD−36°994, GC 8559, HD 46815, HIP 31299, HR 2411, SAO 196945[12][13]
Database references
SIMBADdata

HD 46815 (HR 2411) is a solitary[14] star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away.[1] However, it is receding with a heliocentric radial velocity of 32.2 km/s.[5]

HD 46815 has a stellar classification of K3 III,[3] indicating that it is a red giant. At present it has 117% the mass of the Sun[7] but has expanded to 24.15 times its girth.[8] It shines with a luminosity of 180 L☉[9] from its enlarged photosphere at an effective temperature of 4,297 K,[8] giving an orange hue. HD 46815 has a metallicity 120% that of the Sun and is believed to be a member of the old disk.[10] Due to it being a giant star, it has a low projected rotational velocity of 2.3 km/s.[11]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 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 Anders2019 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference DR2 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Eggen1989 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference DeMederios2014 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 Gould1879 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).