| Observation data EpochJ2000.0 EquinoxJ2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 03h 02m 53.10375s[1] |
| Declination | −01° 08′ 33.7987″[1] |
| Apparent magnitude (V) | 15.56[2] |
| Characteristics | |
| Spectral type | DB[2] |
| Astrometry | |
| Parallax (π) | 15.3618±0.0456 mas[1] |
| Distance | 212.3 ± 0.6 ly (65.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 11.30[2] |
| Details | |
| Mass | 0.59[3] M☉ |
| Radius | 0.01? R☉ |
| Luminosity | 0.0068[2] L☉ |
| Surface gravity (log g) | 7.91 ± 0.18[2] cgs |
| Temperature | 15300[3] K |
| Age | 200million years |
| Other designations | |
| GD 40, EGGR 384, US 3562, WD 0300-019 | |
| Database references | |
| SIMBAD | data |
GD 40 is awhite dwarf in theconstellationCetus. It is located about 212 light-years (65 parsecs) away from the Sun.[1] The star's spectrum has been found to show traces of external of metal contamination due to disruption of an extrasolardwarf planet or anasteroid.[3] The disrupted object should have had roughly the same mass of theSolar System asteroid3 Juno.
 | This extrasolar-planet-related article is astub. You can help Wikipedia byexpanding it. |
 | This article about awhite dwarf is astub. You can help Wikipedia byexpanding it. |
