Tags: Star.
CFBDSIR J145829+101343 (designation abbreviated to CFBDSIR 1458+10 or CFBDSIR J1458+1013) is a binary system of two orbiting each other brown dwarfs of spectral classes T9 + Y0 located in constellation Boötes about 104 light-years away from Earth.The smaller companion CFBDSIR 1458+10B has a surface temperature of approx 370 K (≈100°C) and used to be known as the coolest known brown dwarf until the discovery of WISE 1828+2650 in August 2011.