Angular distance 130.2 ± 0.2″ Observed separation
(projected) 2500 AU Apparent magnitude (B) 13.74 / - Apparent magnitude (J) 13.704 ± 0.023 / >23.9 | Position angle 104.2 ± 0.2° Constellation Volans Component B | |
 | ||
Similar GU Piscium b, WISE 1828+2650, CFBDSIR 1458+10, WISE 0855−0714, HD 189733 | ||
WD 0806-661 (L 97-3, GJ 3483) is a wide binary system of a white dwarf and a Y-type sub-brown dwarf (designated "B"), located in constellation Volans at 63 light-years from Earth. The companion was discovered in 2011. It has the largest actual (2500 AU) and apparent separation (more than 2 arcminutes) of any known planetary-mass object.
Discovery
Component B was discovered in 2011 with Spitzer Space Telescope. Its discovery paper is Luhman et al., 2011. At the time of its discovery, WD 0806-661 B was the coldest "star" that has ever been found, with a temperature of only 27–80 °C, which is similar to some hot areas of Earth.
References
WD 0806-661 Wikipedia(Text) CC BY-SA