Gliese 318
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Pyxis |
| Right ascension | 08h 41m 32.50s |
| Declination | –32° 56′ 34.0″ |
| Apparent magnitude (V) | 11.85 |
| Characteristics | |
| Spectral type | DA5.5 |
| U−B color index | −0.59 |
| B−V color index | +0.25 |
| Astrometry | |
| Radial velocity (Rv) | +29.3 ± 2.9 km/s |
| Proper motion (μ) |
RA: –1100 ± 9 mas/yr Dec.: 1340 ± 8 mas/yr |
| Parallax (π) | 113.63 ± 1.97mas |
| Distance | 28.7 ± 0.5 ly (8.8 ± 0.2 pc) |
| Absolute magnitude (MV) | 12.14 ± 0.05 |
| Details | |
| Mass | 0.45 ± 0.01 M☉ |
| Luminosity | 0.0015 L☉ |
| Temperature | 9120 ± 190 K |
| Age | 550 ± 20 million years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 318 is a white dwarf in the constellation Pyxis. Its spectral type is DA5.5 and it has a visual magnitude of 11.85, which lies 26 light years away. The star was too faint to have had its parallax measured by the Hipparcos satellite. Earth-based measurement gives its parallax as 113.63 ± 1.97 milliarcseconds, yielding a distance of 28.7 ± 0.5 light-years. It is around 45% as massive as the Sun but has only 0.15% its luminosity.
...
Wikipedia