KPD 0005+5106
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 Artist impression of KPD 0005+5106 and possible companion object | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | 00h 08m 18.17031s[2] |
| Declination | +51° 23′ 16.5984″[2] |
| Apparent magnitude (V) | 13.32[3] |
| Characteristics | |
| Evolutionary stage | Helium-burning pre-white dwarf[4] |
| Spectral type | DOZ1[5] |
| Astrometry | |
| Proper motion (μ) | RA: +30.043 mas/yr[2] Dec.: −0.727 mas/yr[2] |
| Parallax (π) | 2.4089±0.0355 mas[2] |
| Distance | 1,350 ± 20 ly (415 ± 6 pc) |
| Details[4] | |
| Mass | 0.64+0.08 −0.04 M☉ |
| Radius | 0.059+0.031 −0.018 R☉ |
| Luminosity | 5,000 L☉ |
| Surface gravity (log g) | 6.7±0.3 cgs |
| Temperature | 200,000±20,000 K |
| Database references | |
| SIMBAD | data |
KPD 0005+5106 is a helium-rich white dwarf[6] located 1,350 light-years from Earth.[2] As a "pre-white dwarf", it is believed to still be in the helium-burning phase, just before nuclear fusion finally stops. It is one of the hottest known white dwarfs, with a temperature of 200,000 K.[4]
