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Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
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 | 200 million years |
Other designations | |
GD 40, EGGR 384, US 3562, WD 0300-019 | |
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.[1] The star's spectrum has been found to show traces of external of metal contamination due to disruption of an extrasolar dwarf planet or an asteroid.[3] The disrupted object should have had roughly the same mass of the Solar System asteroid 3 Juno.