| 166P/NEAT | |
| Discoverer: | NEAT |
| Discovery Date: | October 15, 2001 |
| Designations: | P/2001 T4 |
| Epoch: | March 6, 2006 |
| Semimajor: | 13.83 AU |
| Perihelion: | 8.559 AU |
| Aphelion: | 19.1 AU |
| Eccentricity: | 0.3811 |
| Period: | 51.43 a |
| Inclination: | 15.3813° |
| Last P: | May 20, 2002 |
| Next P: | 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.[1]
166P/NEAT has a perihelion distance of 8.56 AU,[2] and is a Chiron-type comet with (TJupiter > 3; a > aJupiter).[2]