WISE J1147−2040
Astronomical object
From Wikipedia, the free encyclopedia
WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a sub-brown dwarf or rogue planet in the TW Hydrae association, a nearby group of very young stars and brown dwarfs.[6][7] The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets.[8] As such, it is a free-floating object, unassociated with any star system.[9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crater[1] |
| Right ascension | 11h 47m 24.214s[2] |
| Declination | −20° 40′ 20.44″[2] |
| Characteristics | |
| Evolutionary stage | Brown dwarf or a rogue planet |
| Spectral type | L7V[2] |
| Astrometry | |
| Distance | 102±12 ly (31.3±3.8[3] pc) |
| Details | |
| Mass | 5–10[4] MJup |
| Temperature | 1,500±100[3] K 1100–1200[3] K |
| Age | 7±2.5[5] Myr |
| Other designations | |
| WISEA 1147, 2MASS J11472421−2040204, WISEA J114724.10−204021.3 | |
| Database references | |
| SIMBAD | data |
The object was discovered using information from NASA's WISE (Wide-field Infrared Survey Explorer) and the 2MASS (Two Micron All-Sky Survey). Researchers inferred the young age for WISEA 1147 because it is a member of a group of stars that is only 10 million years old, and they estimated its mass using evolutionary models for brown dwarf cooling.
