198 Ampella

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198 Ampella
Discovery
Discovered by A. Borrelly, 1879
Designations
Minor planet category Main belt
Orbital characteristics
Aphelion 3.022 AU
Perihelion 1.894 AU
Semi-major axis 2.458 AU
Eccentricity 0.229
Orbital period 3.85 years
Inclination 9.30°
Physical characteristics
Rotation period 10.383 hours
Albedo 0.252
Spectral type S
Absolute magnitude (H) 8.33

    198 Ampella is a Main belt asteroid that was discovered by Alphonse Borrelly on June 13, 1879. The name seems to be the feminine form of Ampelos, a satyr and good friend of Dionysus in Greek mythology. It could also derive from the Ampelose (plural of Ampelos), a variety of hamadryad. It is an S-type asteroid.

    So far Ampella has been observed occulting a star once, on November 8, 1991 from New South Wales, Australia.

    This asteroid has been resolved by the W. M. Keck Observatory, resulting in a size estimate of 53 km. It is oblate in shape, with a size ratio of 1.22 between the major and minor axes. Measurements from the IRAS observatory gave a similar size estimate of 57 km. Photometric measurements made in 1993 give a rotation period of 10.38 hours.[1]

    References

    1. ↑ Marchis, F. et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus 185 (1): 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813. 
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