Tags: Planet.

239 Adrastea is a main belt asteroid. It was discovered by Johann Palisa on August 18 1884 in Vienna. It is named after the Greek nymph Adrasteia. The asteroid is roughly 42 km in diameter..

apoapsis (km)
5.47578e+11
average speed (km/s)
62100.0
orbital period (μ)
1.62326e+08
periapsis (km)
3.4397e+11
absolute magnitude
10.4
albedo
0.0777
discovery date
1884-08-18
discoverer
Johann Palisa
epoch
30 January 2005 (JD 2453400.5)
former name
A915 TD 1955 MK1, 1956 UJ
rotation period (s)
66494.5

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