2MASS J09393548−2448279 (abbreviated 2MASS 0939−2448)[5] is a probable system of two nearby T-type brown dwarfs, located in constellation Antlia at 17.4 light-years from Earth.

[2] 2MASS 0939−2448 was identified as a brown dwarf through analysis of data from the 2MASS survey by Tinney et al.

[5] Model calculations suggest that 2MASS 0939−2448 is a system of two brown dwarfs with effective temperatures of about 500 and 700 K and masses of about 25 and 40 Jupiter masses; it is also possible that it is a pair of identical objects with temperatures of 600 K and 30 Jupiter masses.

[1] From publication of the discovery in 2005 till at least 2008, 2MASS 0939−2448, or its dimmer component, was the dimmest brown dwarf known.

[6] Later dimmer objects, including (sub)brown dwarfs and rogue planets of new spectral class Y, were discovered, using data from WISE and from other surveys.