18 Melpomene

Tags: Planet.

18 Melpomene is a large bright main-belt asteroid that was discovered by J. R. Hind on June 24 1852 and named after Melpomenē the Muse of tragedy in Greek mythology. It is classified as an S-type asteroid and is composed of silicates and metals.Melpomene occulted the star SAO 114159 on December 11 1978. A possible Melpomenean satellite with a diameter at least 37 km was detected. The satellite candidate received a provisional designation S/1978 (18) 1.

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apoapsis (km)

4.18414e+11

average speed (km/s)

69912.0

mass (kg)

3000.0

orbital period (μ)

1.09776e+08

periapsis (km)

2.68472e+11

temperature (K)

177.0

absolute magnitude

6.51

albedo

0.223

apparent magnitude

7.5

discovery date

1852-06-24

discoverer

John Russell Hind

epoch

October 22 2004 (JD 2453300.5)

escape velocity (kmh)

267.48

rotation period (s)

41662.9