2MASS J21265040-8140293, also known as 2MASS J2126-8140, is an extrasolar planet orbiting the star TYC 9486-927-1. The planet is notable as it has one of the longest orbital period (around 900,000 years) of any known planets so far, and one of the widest orbits for a planetary mass object known (>4,500AU), beaten only by COCONUTS-2b.
Its estimated mass, age, spectral type, and Teff are similar to the well-studied planet β Pictoris b.