(66391)_1999_kw4 | epoch | 2004-07-14 <tsp> (66391)_1999_kw4 | escapevelocity | 0 <tsp> (66391)_1999_kw4 | orbitalperiod | 162447000 <tsp> (66391)_1999_kw4 | apoapsis | 1621640918388 (kilometres) <sep> 66391 moshup , provisional designation 1999 kw4, is a binary asteroid, classified as a near-earth object and potentially hazardous asteroid of the aten group, approximately 13 kilometers in diameter it was discovered on 20 may 1999, by lincoln near-earth asteroid research (linear) at the lincoln laboratory's experimental test site in socorro, new mexico, united states it is a mercury-crosser that comes extremely close to the sun at a perihelion of 02 au 
the asteroid called (66391) 1999 kw4 has an orbital period of 16244700.0 and an apoapsis of 162164091.8388 kilometres. it has an escape velocity of zero and the epoch date is 14 july 2004.no information