HD 93833

Last updated
HD 93833
Sextans constellation map.svg
Red circle.svg
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]
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
73 G. Sextantis [12] , BD−09°3147, GC  14900, HD  93833, HIP  52948, HR  4233, SAO  137815, TIC  55109651 [13]
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]

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References

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