Tags: Planet.

(66391) 1999 KW4 (also written (66391) 1999 KW4) is an Aten and Mercury-crosser asteroid discovered by LINEAR in 1999.1999 KW4 has a moon orbiting it. The moon designated S/2001 (66391) 1 or 1999 KW4 Beta is ~360 m in diameter and orbits 1999 KW4 ‘Alpha’ in 0.758 d (16 hours) at a distance of 2.6 km.

1999_KW4_animated.gif
apoapsis (km)
1.62164e+11
average speed (km/s)
133776.0
density (μ3)
2000.0
orbital period (μ)
1.62447e+07
periapsis (km)
2.99196e+10
absolute magnitude
16.5
albedo
0.15
discovery date
1999-05-20
discoverer
Lincoln Near-Earth Asteroid Research
epoch
July 14 2004 (JD 2453200.5)
escape velocity (kmh)
0.0
former name
none
rotation period (s)
9953.28

Loading...

This page contains content from the copyrighted Wikipedia article "(66391) 1999 KW4"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.