(66391)_1999_kw4 | averagespeed | 3716 (kilometreperseconds) <tsp> (66391)_1999_kw4 | density | 20 (grampercubiccentimetres) <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 celestial body known as (66391) 1999 kw4 has an apoapsis of 162164091.8388 km. an average speed of 37.16 kilometres per second. and a density of 2.0 grams per cubic centimetre.no information