HD 93905
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  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Antlia[1] |
| Right ascension | 10h 49m 57.0188s[2] |
| Declination | −34° 03′ 29.451″[2] |
| Apparent magnitude (V) | 5.61[1] |
| 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[2] mas/yr Dec.: +5.845[2] mas/yr |
| Parallax (π) | 8.7989±0.1617 mas[2] |
| Distance | 371 ± 7 ly (114 ± 2 pc) |
| Absolute magnitude (MV) | 0.00[1] |
| 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 | |
| 80 G. Antliae, CD−33°7288, CPD−33°2973, HD 93905, HIP 52965, HR 4238, SAO 201805 | |
| 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[1] and an apparent magnitude of 5.61,[1] making it faintly visible to the naked eye under ideal conditions. The star is located 371 light years[2] 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]
