WISE 1828+2650 (full designation WISEPA J182831.08+265037.8) is a possibly binary[5] brown dwarf or rogue planet[2] of spectral class >Y2,[2] located in the constellation Lyra at approximately 32.5 light-years from Earth.

[2] This suggests that WISE 1828+2650 may be a free-floating planet rather than a brown dwarf, since it is below the lower mass limit for deuterium fusion (~13 MJup).

This amount of 15NH3 is lower than in any Solar System body and it is an indication that WISE 1828+2650 has formed like a star and not like a planet.

[2] However, the spectrum of the system best fits a pair of brown dwarfs, each with an effective temperature of about 325 K and a mass of about 5 MJ.

[12] NIRSpec low resolution prism observations cannot be explained with existing Sonora Bobcat models of planetary objects, neither single nor multiple.

[12] A newer analysis of the NIRSpec data compared radius determined with atmospheric retrieval framework CHIMERA and evolutionary model Sonora Bobcat.