WISEA 1147 is a brown dwarf in the TW Hydrae association that is unassociated with any system.
The brown dwarf was discovered using information from NASA's WISE (Wide-field Infrared Survey Explorer) and the 2MASS (Two Micron All-Sky Survey), researchers believe WISEA 1147 is a brown dwarf, because it is located within a group of stars and is only 10-million-years-old. The planetary-mass sits within a young star family and is 5 to 10 times the mass of Jupiter.
References
WISE J1147-2040 Wikipedia(Text) CC BY-SA