S Ori 70
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 38m 10.10s |
| Declination | −02° 36′ 00.0″ |
| Characteristics | |
| Spectral type | T6 |
| Apparent magnitude (H) | 20.07 |
| Astrometry | |
| Proper motion (μ) | RA: 10 mas/yr Dec.: 5 mas/yr |
| Distance | 1,150 ly (352 pc) |
| Details | |
| Mass | 3 MJup |
| Surface gravity (log g) | 3.5 cgs |
| Age | 3 Myr |
| Other designations | |
| Mayrit 520267 S Ori 70 S Ori J053810.1-023626 | |
| Database references | |
| SIMBAD | data |
S Ori 70 or S Ori J053810.1-023626 is a mid-T type astronomical object in the foreground of the σ Orionis cluster, which is approximately 1,150 light-years from Earth. It was discovered on November 24, 2002 by M. R. Zapatero-Osorio and E. L. Martin's team at the Roque de los Muchachos Observatory. It has yet to be determined if it is a field brown dwarf or a 3-million-year-old planet that is part of a cluster. Near-infrared spectroscopy images taken three years after its discovery led to the first motion measurements for the object. Its behavior is significantly different from what may be expected; it was further described as either a low-gravity atmosphere or an atmosphere with metallicity. The object's small proper motion suggests that it is further away than expected if it were a single field T dwarf.