UGPS J072227.51−054031.2
Location of UGPS 0722−05 in the constellation Monoceros | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 07h 22m 27.29s |
| Declination | −05° 40′ 30.0″ |
| Characteristics | |
| Spectral type | T9 |
| Apparent magnitude (i (AB SDSS)) | 24.32±0.12 |
| Apparent magnitude (z) | 20.51±0.09 |
| Apparent magnitude (Y) | 17.37±0.02 |
| Apparent magnitude (J) | 16.52±0.02 |
| Apparent magnitude (H) | 16.90±0.02 |
| Apparent magnitude (K) | 17.07±0.08 |
| Apparent magnitude (L') | 13.4±0.3 |
| Apparent magnitude (N) | 10.28±0.24 |
| Astrometry | |
| Radial velocity (Rv) | 46.9±2.5 km/s |
| Proper motion (μ) | RA: −904.14±1.71 mas/yr Dec.: +352.025±1.21 mas/yr |
| Parallax (π) | 242.8±2.4 mas |
| Distance | 13.4 ± 0.1 ly (4.12 ± 0.04 pc) |
| Details | |
| Mass | 3 – 11 MJup |
| Radius | 1.02±0.10 RJup |
| Luminosity (bolometric) | 6.31+0.45 −0.28×10−7 L☉ |
| Surface gravity (log g) | (4.39±0.01) – (4.90±0.01) cgs |
| Temperature | 505±10 K |
| Rotational velocity (v sin i) | 40±10 km/s |
| Age | 0.06 to 1 Gyr |
| Other designations | |
| WISEPA J072227.27−054029.9, GJ 11075 | |
| Database references | |
| SIMBAD | data |
UGPS J072227.51−054031.2 (designation often abbreviated to UGPS 0722−05) is a sub-brown dwarf or rogue planet of late T type, located approximately 4.1 parsecs (13 light-years) from Earth.
The object is roughly the volume of Jupiter, but is estimated to have 3–11 Jupiter masses (MJ). This would make it less massive than ε Indi Ba. As objects of this type below 13 Jupiter masses are thought to be more likely to be planets than Brown Dwarfs, it would either be classified as a planet or a sub-brown dwarf, depending on how it formed and the definition used. Infrared spectra shows the object contains water vapor and methane and has a surface temperature of approximately 480–560 kelvins.