|Discovery date||October 15, 2001|
|Orbital characteristics A|
|Epoch||March 6, 2006|
|Semi-major axis||13.83 AU|
|Orbital period||51.43 a|
|Last perihelion||May 20, 2002|
|Next perihelion||November 26, 2053|
166P/NEAT is a periodic comet and centaur in the outer Solar System. It was discovered by the Near Earth Asteroid Tracking (NEAT) project in 2001 and initially classified a comet with provisional designation P/2001 T4 (NEAT), as it was apparent from the discovery observations that the body exhibited a cometary coma. It is one of few known bodies with centaur-like orbits that display a coma, along with 60558 Echeclus, 2060 Chiron, 165P/LINEAR and 167P/CINEOS. It is also one of the reddest centaurs.