WISEA J120037.79-784508.3, also called W1200-7845 or 2MASS J12003792-7845082, is a brown dwarf with a primordial disk 333.73 ± 3.13 lightyears from Earth in the 3.7+4.6−1.4 Myr-old ε Chamaeleontis (ε Cha) association, currently making it the closest known brown dwarf with an associated circumstellar disk.

[2] It was discovered by citizen scientists in 2020 volunteering for the Disk Detective project.

[3] Disk Detective's science team then cross-matched W1200-7845 with BANYAN Σ, a Bayesian analysis tool used to estimate the likelihood that an object is a member of a young moving group based on its position, proper motion, parallax (using Gaia DR2 data, if available) and radial velocity.

The analysis revealed (with 99.8% probability) that the brown dwarf was a member of the ε Cha young moving group association.

The gamma (γ) signifies the low surface gravity of the object, which is typical for young brown dwarfs.