(66391)_1999_kw4 | averagespeed | 3716 (kilometreperseconds) <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 average speed of (66391) 1999 kw4. is 37.16 km/s. <sep> no information