Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Antlia |
Right ascension | 10h 49m 57.0188s[1] |
Declination | −34° 03′ 29.4506″[1] |
Apparent magnitude (V) | 5.61[2] |
Characteristics | |
Evolutionary stage | main sequence[3] |
Spectral type | A1 V[4] |
U−B color index | +0.05[5] |
B−V color index | +0.04[5] |
Astrometry | |
Radial velocity (Rv) | −9.5±1.3[6] km/s |
Proper motion (μ) | RA: −41.069[1] mas/yr Dec.: +5.845[1] mas/yr |
Parallax (π) | 8.7989 ± 0.1617 mas[1] |
Distance | 371 ± 7 ly (114 ± 2 pc) |
Absolute magnitude (MV) | 0.00[2] |
Details[3] | |
Mass | 2.78±0.05 M☉ |
Radius | 3.89[7] R☉ |
Luminosity | 101±9 L☉ |
Surface gravity (log g) | 3.77[8] cgs |
Temperature | 8995+125 −123 K |
Rotational velocity (v sin i) | 85[9] km/s |
Age | 256±6 Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 93905 (HR 4238) is a solitary star located in the southern constellation Antlia. The star has an absolute magnitude of 0[2] and an apparent magnitude of 5.61,[2] making it faintly visible to the naked eye under ideal conditions. The star is located 371 light years[1] away based on its parallax shift and is drifting closer with a helocentric radial velocity of −9.6 km/s.[6]
This star has a classification of A1 V,[4] which indicates that it is an ordinary A-type main-sequence star that is fusing hydrogen at its core. At present it has 2.78[3] times the mass of the Sun but is large and over luminous for its class with 3.89[7] times and 101[3] times the radius and luminosity of the Sun respectively. This is because HD 93905 has already completed most of its main sequence lifetime at an age of 256 million years.[3] HD 93905 has a surface temperature of 8,895 K[3] and spins quickly with a projected rotational velocity of 85 km/s.[9]