(179806) 2002 TD66 (also written 2002 TD66) is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group.
It was discovered on 5 October 2002, by the LINEAR project at Lincoln Laboratory's ETS in Socorro, New Mexico.
Due to the proximity of its orbit to Earth and its estimated size, this object has been classified as a potentially hazardous asteroid (PHA) by the Minor Planet Center in Cambridge, Massachusetts.
[4] A Doppler observation[1] has helped produce a well known trajectory with a condition code (Uncertainty Parameter U) of 0.
Radar astronomy shows it is a contact binary asteroid with a diameter of 300 meters and a rotation period of 9.5 hours.