WISE 2220−3628
WISE J222055.31−362817.4 is a brown dwarf of spectral class Y0, located in constellation Grus at approximately 26 light-years from Earth.
Discovery
WISE 2220−3628 was discovered in 2012 by J. Davy Kirkpatrick et al. from data, collected by Wide-field Infrared Survey Explorer Earth-orbiting satellite — NASA infrared-wavelength 40 cm space telescope, which mission lasted from December 2009 to February 2011. In 2012 Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented discovery of seven new found by WISE brown dwarfs of spectral type Y, among which also was WISE 2220−3628.Properties
Y-class dwarfs are among the coldest of all brown dwarfs.Distance
of WISE 2220−3628 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means.| Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
| Kirkpatrick et al., Table 8 | 8.1 | 26.4 |
Non-trigonometric distance estimates are marked in italic.