239 Adrastea
Asteroid
Adrastea is a main belt asteroid. It was discovered by Johann Palisa on 18 August 1884 in Vienna, and was named after the Greek nymph Adrasteia. This asteroid is orbiting the Sun at a distance of 2.97 AU with a period of 5.11 years and an... Wikipedia
Discoverer: Johann Palisa
Discovered: August 18, 1884
Absolute magnitude (H): 10.4
Average orbital speed: 17.25 km/s
Orbital period (sidereal): 5.11 yr (1,865.9 d)
Perihelion: 2.2695 AU (339.51 Gm)