WISE J2209+2711 (WISE J220905.73+271143.9) is a brown dwarf of spectral type Y0:,[1] located in constellation Pegasus at 22 light-years from Earth.

[6] Its discovery was published in 2014 by Cushing et al.[1] WISE J2209+2711 is one of a few Y-dwarfs observed with JWST NIRSpec and MIRI.

The excellent fit was achieved with a model that used an effective temperature of 350 K and a surface gravity of 4.0.

This corresponds to a 5 MJ object with an age of 800 Myrs.

[4] This brown dwarf-related article is a stub.