BPM 37093
| 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 | 1.160±0.014 M☉ |
| Radius | 0.00583+0.00081 −0.00080 R☉ |
| Luminosity | 5.62+0.13 −0.12×10−4 L☉ |
| Surface gravity (log g) | 8.970±0.005 cgs |
| Temperature | 11,650±40 K |
| Other designations | |
| V886 Cen, BPM 37093, GJ 2095, LFT 931, LHS 2594, LTT 4816, WD 1236-495 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
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.