HD 93833

HD 93833
Location of HD 93833 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Sextans
Right ascension 10h 49m 43.49171s[1]
Declination −09° 51′ 09.6859″[1]
Apparent magnitude (V) 5.84±0.01[2]
Characteristics
Evolutionary stage horizontal branch[3]
Spectral type K0 III[4]
U−B color index +0.91[5]
B−V color index +1.07[5]
Astrometry
Radial velocity (Rv)40.3±2.9[6] km/s
Proper motion (μ) RA: +5.882 mas/yr[1]
Dec.: −30.041 mas/yr[1]
Parallax (π)9.4637 ± 0.1343 mas[1]
Distance345 ± 5 ly
(106 ± 1 pc)
Absolute magnitude (MV)+0.76[7]
Details
Mass1.40[8] M☉
Radius10.7±0.5[9] R☉
Luminosity60.4±1.0[1] L☉
Surface gravity (log g)2.46[10] cgs
Temperature4,675±22[10] K
Metallicity [Fe/H]−0.11±0.09[11] dex
Age5.50[8] Gyr
Other designations
73 G. Sextantis[12], BD−09°3147, GC 14900, HD 93833, HIP 52948, HR 4233, SAO 137815, TIC 55109651[13]
Database references
SIMBADdata

HD 93833 (HR 4233; 73 G. Sextantis) is a solitary star located in the equatorial constellation Sextans. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.84.[2] Gaia DR2 parallax measurements imply a distance of 345 light-years[1] and it receding with a heliocentric radial velocity of 40.3 km/s.[6] At its current distance, HD 93833's brightness is diminished by an interstellar extinction of 0.18 magnitudes[14] and it has an absolute magnitude of +0.76.[7]

HD 93833 has a stellar classification of K0 III,[4] indicating that it is an evolved K-type giant star that has exhausted hydrogen at its core and left the main sequence. It is currently a red clump star that is on the horizontal branch—fusing helium at its core.[3] It has 1.4 times the mass of the Sun but at the age of 5.5 billion years,[8] it has expanded to 10.7 times the radius of the Sun.[9] It radiates 60.4 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 4,675 K.[10] HD 93833 is slightly metal deficient with an iron abundance of [Fe/H] = −0.11 or 77.6% of the Sun's abundance.[11]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR2 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 Laney2011 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Johnson1966 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. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Dotter2008 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Brown1989 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 SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).