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] |
Distance | 345 ± 5 ly (106 ± 1 pc) |
Absolute magnitude (MV) | +0.76[7] |
Details | |
Mass | 1.40[8] M☉ |
Radius | 10.7±0.5[9] R☉ |
Luminosity | 60.4±1.0[1] L☉ |
Surface gravity (log g) | 2.46[10] cgs |
Temperature | 4,675±22[10] K |
Metallicity [Fe/H] | −0.11±0.09[11] dex |
Age | 5.50[8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]