Shrabis B

Shrabis B is actually made of two stars (though it was not realised when it was first observed); Shrabis BA and Shrabis BB. They are both very dim brown dwarf stars, with surface temperatures of just 700 K.

Because of their low mass and lack of metals, no planets orbit the pair. They also make an unlikely target for colonisation due to the low heat and light output of both stars.