HD 81040
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 09h 23m 47.08737s |
| Declination | +20° 21′ 52.0349″ |
| Apparent magnitude (V) | +7.73 |
| Characteristics | |
| Spectral type | G0V |
| B−V color index | 0.680±0.012 |
| Astrometry | |
| Radial velocity (Rv) | +49.270±0.0017 km/s |
| Proper motion (μ) | RA: −151.265±0.045 mas/yr Dec.: 35.708±0.036 mas/yr |
| Parallax (π) | 29.0635±0.0414 mas |
| Distance | 112.2 ± 0.2 ly (34.41 ± 0.05 pc) |
| Absolute magnitude (MV) | 5.12 |
| Details | |
| Mass | 0.962±0.040 M☉ |
| Radius | 0.91+0.01 −0.03 R☉ |
| Luminosity | 0.838±0.018 L☉ |
| Surface gravity (log g) | 4.48 cgs |
| Temperature | 5,753 K |
| Metallicity [Fe/H] | −0.06±0.03 dex |
| Rotation | 15.98 d |
| Rotational velocity (v sin i) | 5.3 km/s |
| Age | 1.79+0.30 −0.26 Gyr |
| Other designations | |
| BD+20°2374, FK5 4836, GC 12951, HD 81040, HIP 46076, SAO 80800, PPM 99541 | |
| Database references | |
| SIMBAD | data |
HD 81040 is a star in the equatorial constellation of Leo. With an apparent visual magnitude of +7.73 it is too dim to be visible to the naked eye but can be viewed with a small telescope. The star is located at a distance of 112 light years from the Sun based on parallax. It is drifting further away with a radial velocity of +49 km/s, having come to within 48 light-years some 527,000 years ago.