A loose grouping of very young, low-mass stars of the T Tauri type, still associated with the nebula from which they formed, and often partly obscured by it. They have relative velocities of several kilometres per second and are not bound together by gravity, so the association is likely to break up after only about 10 million years. The closest T association to the Sun is the Taurus–Auriga association, at a distance of 460 l.y.