HD 10939
Star in the constellation Eridanus
From Wikipedia, the free encyclopedia
HD 10939 is a star[5][6] with an apparent magnitude of 5.03, making it visible to the naked eye. It glows white with a spectral type of A1V, and has a surface temperature of around 7,500 to 10,000 K.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Eridanus[1] |
| Right ascension | 01h 46m 06.3s[2] |
| Declination | −53° 31′ 19″[2] |
| Apparent magnitude (V) | 5.03[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | A1V[4] |
| U−B color index | 0.05[5][6] |
| B−V color index | 0.04[5][6] |
| Astrometry | |
| Proper motion (μ) | RA: +126.534 mas/yr[2] Dec.: +59.909 mas/yr[2] |
| Parallax (π) | 16.0575±0.0693 mas[2] |
| Distance | 203.1 ± 0.9 ly (62.3 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.08[1] |
| Details | |
| Mass | 2.3[7] M☉ |
| Radius | 2.27[7] R☉ |
| Luminosity | 32[7] L☉ |
| Surface gravity (log g) | 4.09[7] cgs |
| Temperature | 9,110[7] K |
| Rotation | 0.69 days[8] |
| Rotational velocity (v sin i) | 72.8[8] km/s |
| Age | 346[9] Myr |
| Other designations | |
| CPD−54°377, SAO 232520, HD 10939, HR 520, q2 Eridani[5] | |
| Database references | |
| SIMBAD | data |
