(66391)_1999_kw4 | epoch | 2004-07-14 <tsp> (66391)_1999_kw4 | rotationperiod | 995328 <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 rotation period of (66391) 1999 kw4 is 9953.28 and its epoch date is july 14th 2004.no information