BPM 37093
BPM 37093 (V886 Centauri) is a variable white dwarf star of the DAV, or ZZ Ceti, type, with a hydrogen atmosphere and an unusually high mass of approximately 1.1 times the Sun's. It is 48 light-years (15 parsecs) from Earth in the constellation Centaurus and vibrates; these pulsations cause its luminosity to vary. Like other white dwarfs, BPM 37093 is thought to be composed primarily of carbon and oxygen, which are created by thermonuclear fusion of helium nuclei in the triple-alpha process.
A light curve for V886 Centauri, adapted from Kanaan et al. (1992) | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 38m 49.78112s |
| Declination | −49° 48′ 00.2195″ |
| Apparent magnitude (V) | 14.0 |
| Characteristics | |
| Spectral type | DAV4.4 |
| Variable type | DAV (ZZ Ceti) |
| Astrometry | |
| Radial velocity (Rv) | −12 km/s |
| Proper motion (μ) | RA: -557.111 mas/yr Dec.: -74.036 mas/yr |
| Parallax (π) | 67.4058 ± 0.0186 mas |
| Distance | 48.39 ± 0.01 ly (14.836 ± 0.004 pc) |
| Details | |
| Mass | 1.10 M☉ |
| Radius | 0.0057 R☉ |
| Luminosity | 0.001 L☉ |
| Surface gravity (log g) | 8.81 ± 0.05 cgs |
| Temperature | 11730 ± 350 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
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