PSO J318.5−22
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 14m 08.0256s |
| Declination | −22° 51′ 35.838″ |
| Characteristics | |
| Evolutionary stage | Free-floating planetary-mass object |
| Spectral type | L7.5 |
| Variable type | rotational variable |
| Astrometry | |
| Radial velocity (Rv) | 6.0+0.8 −1.1 km/s |
| Proper motion (μ) | RA: 136.3 ±1 mas/yr Dec.: -144.3 ±1.3 mas/yr |
| Parallax (π) | 45.1±1.7 mas |
| Distance | 72 ± 3 ly (22.2 ± 0.8 pc) |
| Details | |
| Mass | 8.3 ±0.5 MJup |
| Radius | 1.464 ±0.010 RJup |
| Luminosity (bolometric) | 10-4.52 ±0.04 L☉ |
| Surface gravity (log g) | 4.01 ±0.03 cgs |
| Temperature | 1127+24 −26 K |
| Rotation | 8.45 ± 0.05 hours |
| Rotational velocity (v sin i) | 17.5+2.3 −2.8 km/s |
| Age | 23 ±3 Myr |
| Other designations | |
| 2MASS J21140802-2251358, CNS5 5236, TIC 24266526, WISE J211408.13-225137.3 | |
| Database references | |
| SIMBAD | data |
PSO J318.5−22 is an extrasolar object of planetary mass that does not orbit a parent star, it is an analog to directly imaged young gas giants. There is no consensus yet among astronomers whether the object should be referred to as a rogue planet, as a young brown dwarf, or as a sub-brown dwarf. It is approximately 80 light-years away and belongs to the Beta Pictoris moving group. The object was discovered in 2013 in images taken by the Pan-STARRS PS1 wide-field telescope. PSO J318.5-22's age is inferred to be 23 million years, the same age as the Beta Pictoris moving group. Based on its calculated temperature and age, it is classified under the brown dwarf spectral type L7.