WISE 1541−2250
| Observation data Epoch MJD 55424.68 Equinox J2000 | |
|---|---|
| Constellation | Libra |
| Right ascension | 15h 41m 51.57s |
| Declination | −22° 50′ 25.03″ |
| Characteristics | |
| Spectral type | Y0.5 |
| Apparent magnitude (J (MKO filter system)) | 21.16 ± 0.36 |
| Apparent magnitude (H (MKO filter system)) | 20.99 ± 0.52 |
| Astrometry | |
| Proper motion (μ) | RA: –903.02 ±0.41 mas/yr Dec.: –87.93 ±0.27 mas/yr |
| Parallax (π) | 172.28±1.55 mas |
| Distance | 18.9 ± 0.2 ly (5.80 ± 0.05 pc) |
| Details | |
| Mass | 12 (8–12) MJup |
| Radius | 1.01 (1.01–1.07) RJup |
| Surface gravity (log g) | 4.50 (4.25–4.5) cgs |
| Temperature | 350 K |
| Other designations | |
| WISEPA J154151.66−225025.2 WISEP J1541−2250 WISE J1541−2250 WISE 1541−2250 | |
| Database references | |
| SIMBAD | data |
Location of WISE 1541−2250 in the constellation Libra | |
WISE 1541−2250 (full designation WISEPA J154151.66−225025.2) is a sub-brown or brown dwarf of spectral class Y0.5, located in the constellation Libra at approximately 18.6 light-years from Earth. This object received popular attention when its discovery was announced in 2011 at a distance estimated to be only about 9 light-years, which would have made it the closest brown dwarf known. (For really close brown dwarfs see, for example, Luhman 16, WISE 1506+7027, Epsilon Indi Ba, Bb, or UGPS 0722-05). It is not the farthest known Y-type brown dwarf to Earth.