GD 40
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus[1] |
| Right ascension | 03h 02m 53.10375s[2] |
| Declination | −01° 08′ 33.7987″[2] |
| Apparent magnitude (V) | 15.56[3] |
| Characteristics | |
| Evolutionary stage | white dwarf[3] |
| Spectral type | DB[3] |
| Astrometry | |
| Parallax (π) | 15.3618±0.0456 mas[2] |
| Distance | 212.3 ± 0.6 ly (65.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 11.30[3] |
| Details[3] | |
| Mass | 0.54 M☉ |
| Radius | 0.014±0.003[a] R☉ |
| Luminosity | 0.0068 L☉ |
| Surface gravity (log g) | 7.91±0.18 cgs |
| Temperature | 14,280±298 K |
| Age | 200[b] Myr |
| Other designations | |
| GD 40, EGGR 384, US 3562, WD 0300-013 | |
| Database references | |
| SIMBAD | data |
GD 40 is a white dwarf in the constellation Cetus. It is located about 212 light-years (65 parsecs) away from the Sun.[2] The star's spectrum has been found to show traces of external metal contamination due to disruption of an extrasolar dwarf planet or an asteroid.[4] The disrupted object should have had at least the same mass as the asteroid 4 Vesta.
