WISEPA J101905.63+652954.2
WISEPA J101905.63+652954.2 (also called WISE 1019+6529) is a binary made up of two cold brown dwarfs. Both brown dwarfs have a late spectral type T. The pair was detected in radio emission, which is pulsed and periodic.
Source: Wikipedia — WISEPA J101905.63+652954.2 (CC BY-SA 4.0)