| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crater |
| Right ascension | 10h 56m 38.63s |
| Declination | −22° 52′ 56.08″ |
| Apparent magnitude (V) | 16.0 |
| Characteristics | |
| Evolutionary stage | white dwarf |
| Spectral type | DAZ[1] |
| Astrometry | |
| Proper motion (μ) | RA: -78.865 ±0.047mas/yr[2] Dec.: 298.019 ±0.051mas/yr[2] |
| Parallax (π) | 27.6511±0.0511 mas[2] |
| Distance | 118.0 ± 0.2 ly (36.16 ± 0.07 pc) |
| Details[1] | |
| Mass | 0.62 ±0.05 M☉ |
| Radius | 0.012 ±0.001 R☉ |
| Surface gravity (log g) | -3.27 ±0.09 cgs |
| Temperature | 7910 ±120 K |
| Age | cooling age: 1.3 ±0.2 Gyr |
| Other designations | |
| LP 849-31, EC 10542−2236,GALEX J105638.5−225253, LEHPM 2-1372, LP 849-31,2MASS J10563864−2252564, NLTT 25792,PSO J164.1606−22.8810,SDSS J105638.59−225254.3,TIC 415714190 | |
| Database references | |
| SIMBAD | data |
WD 1054−226, also known asLP 849-31, is a relatively coolmagnitude 16white dwarf star with a hydrogen atmosphere, in the small southern constellation ofCrater[3] located approximately 117light years away atright ascension10h 57m anddeclination −22° 53′ (J2000epoch). The name WD 1054−226 is based on the coordinates in the J1950 epoch. The star was recognized as a white dwarf along with 32 other nearby white dwarfs (or double white dwarfs) in 2007.[4]
In 2022 it was reported that the flux of light coming from the star varies continually due to partial obscuring by a ring. The pattern of variation repeats with little change every 25.02 hours. There are dips in the light flux every 23 minutes, exactly 65 per period of 25.02 hours. The explanation of this strong 65th harmonic is unknown and the authors of the paper say that the phenomenon is puzzling. It seems to be caused by clumps of matter orbiting the star.[5][1] The researchers have hypothesized that the clumps are being influenced by a moon-sized object, possibly anexoplanet. If it has a period of 25 hours then it is orbiting in thehabitable zone of the system. If this is confirmed, it would be the first time that a planet has been found orbiting in the habitable zone of a white dwarf.[5][6]
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||
2022 in space | ||
|---|---|---|
Space probe launches |
|   |
| Impact events | ||
| SelectedNEOs | ||
| Discoveries | ||
| Comets | ||
| Space exploration | ||
