WISE 0855−0714

WISE J085510.83−071442.5

Time-lapsed photo sequence of WISE 0855−0714's movement in the sky using captured images from the WISE and the Spitzer telescopes.
Observation data Epoch J2000      Equinox J2000
Constellation	Hydra
Right ascension	08h 55m 10.83s
Declination	−07° 14′ 42.5″
Characteristics
Evolutionary stage	Sub-brown dwarf
Spectral type	Class Y2
Astrometry
Proper motion (μ)	RA: 7003811800000000000♠−8118±8 mas/yr Dec.: 7002680000000000000♠680±7 mas/yr
Parallax (π)	449 ± 8mas
Distance	7000727000000000000♠7.27±0.13 ly (7000223000000000000♠2.23±0.04 pc)
Details
Mass	~3–10 MJup
Temperature	225-260 K
Other designations
WISEA J085510.74-071442.5
Database references
SIMBAD	data

Coordinates: 08^h 55^m 10.83^s, −07° 14′ 42.5″

WISE 0855−0714 (full designation WISE J085510.83−071442.5) is a (sub-) brown dwarf 7000223000000000000♠2.23±0.04 parsecs (7000727000000000000♠7.27±0.13 light-years) from Earth announced in April 2014 by Kevin Luhman using data from the Wide-field Infrared Survey Explorer (WISE). As of 2014^[update], WISE 0855−0714 has the third-highest proper motion (7003811800000000000♠8118±8 mas/yr) after Barnard's Star (7004103000000000000♠10300 mas/yr) and Kapteyn's Star (7003860000000000000♠8600 mas/yr). As of 2014^[update] it also has the fourth-largest parallax (7002449000000000000♠449±8 mas) of any known star or brown dwarf, meaning it is the fourth closest extrasolar system to the Sun. It is also the coldest object of its type found in interstellar space, having a temperature in the range 225 to 260 K (−48 to −13 °C; −55 to 8 °F).

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