WISE J1147−2040
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WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a brown dwarf in the TW Hydrae association, a nearby group of very young stars and brown dwarfs.[5][6] The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets.[7] Nevertheless, it is a free-floating object, unassociated with any star system.[8]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hydra |
Right ascension | 11h 47m 24.214s[1] |
Declination | −20° 40′ 20.44″[1] |
Characteristics | |
Evolutionary stage | Brown dwarf or a rogue planet |
Spectral type | L7V[1] |
Astrometry | |
Distance | 102 ± 12 ly (31.3 ± 3.8[2] pc) |
Details | |
Mass | 5–10[3] MJup |
Radius | 2.08[citation needed] RJup |
Temperature | 1500 ± 100[2] K 1100–1200[2] K |
Age | 7±2.5[4] Myr |
Other designations | |
WISEA 1147, 2MASS J11472421−2040204, WISEA J114724.10−204021.3 | |
Database references | |
SIMBAD | data |
Close
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.