WD 0806-661 [SEP] constellation
WD 0806−661
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
other Y-type object WD 0806-661 B. WD 0806-661 B could have formed as a planet close to its primary, WD 0806-661 A, and later, when the primary became a white dwarf and lost most of its mass, have migrated into a larger orbit of 2500 AU, and similarity between WD 0806-661 B and WISE 1828+2650 may indicate that WISE 1828+2650 had formed in the same way.
Physical properties Possible binarity.
Comparison between WISE 1828+2650 and WD