WD J0651+2844
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 51m 33.340s |
| Declination | 28° 44′ 23.45″ |
| Apparent magnitude (V) | 19.06 |
| Characteristics | |
| Spectral type | DAH |
| Astrometry | |
| Proper motion (μ) | RA: −1.097 mas/yr Dec.: −7.511 mas/yr |
| Parallax (π) | 1.0071±0.3091 mas |
| Distance | approx. 3,200 ly (approx. 1,000 pc) |
| Orbit | |
| Period (P) | 12.75344 minutes |
| Inclination (i) | 84.4° |
| Details | |
| A | |
| Mass | 0.26 M☉ |
| Radius | 0.0371 R☉ |
| Temperature | 16,530 K |
| B | |
| Mass | 0.50 M☉ |
| Radius | 0.0142 R☉ |
| Temperature | 8,700 K |
| Other designations | |
| SDSS J065133.338+284423.37, SDSS J0651, J0651, SDSS J0651+2844, WD+WD J0651+2844 | |
| Database references | |
| SIMBAD | data |
WD J0651+2844 is a white dwarf binary star system composed of two white dwarfs. They are approximately 120,000 km apart and complete an orbit around their barycenter in less than 13 minutes. This produces an eclipse every 6 minutes. This makes it possible to gather enough data to produce extremely accurate predictions of each future eclipse. The eclipse times deviate from the time predicted in a way consistent with gravitational waves.