Besides being extremely close to Earth, this object is a T dwarf - a very cool brown dwarf - and the only such object found as a companion to a low-mass star. It is also likely the brightest known object of its temperature because it is so close. |
It is also likely the brightest known object of its temperature because it is so close. And it's a rare example of a brown dwarf companion within 10 astronomical units of its primary star. |