TW PsA is also known as Gl 879, HR 8721, HD 216803, and CD-32°17321. An orange dwarf flare star and a BY Draconis variable, one of the larger such stars. Less than a light year from Fomalhaut (57,000 AU), and possibly gravitationally bound to it in a cluster or stellar association in the Castor Moving Group. They were found to share a common proper motion and in 2012 it was found to be consistent with a binary syste. About 200 Million Years old, along with the rest of the group. Visible to some humans with the naked eye.