WD J0651+2844
Star in the constellation Gemini
From Wikipedia, the free encyclopedia
WD J0651+2844 is a white dwarf binary star system composed of two white dwarfs.[6] They are approximately 120,000 km apart and complete an orbit around their barycenter in less than 13 minutes.[1] 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.[7][8][9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Gemini[2] |
| Right ascension | 06h 51m 33.340s[3] |
| Declination | 28° 44′ 23.45″[3] |
| Apparent magnitude (V) | 19.06[4] |
| Characteristics | |
| Spectral type | DAH[5] |
| Astrometry | |
| Proper motion (μ) | RA: −1.097[3] mas/yr Dec.: −7.511[3] mas/yr |
| Parallax (π) | 1.0071±0.3091 mas[3] |
| Distance | approx. 3,200 ly (approx. 1,000 pc) |
| Orbit[1] | |
| Period (P) | 12.75344 minutes |
| Inclination (i) | 84.4° |
| Details[1] | |
| 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 |
