|Discovered by||A. Borrelly, 1879|
|Discovery date||13 June 1879|
|Epoch 31 July 2016 (JD 2457600.5)|
|Uncertainty parameter 0|
|Observation arc||131.26 yr (47944 d)|
|Aphelion||3.0193 AU (451.68 Gm)|
|Perihelion||1.8986 AU (284.03 Gm)|
|2.4589 AU (367.85 Gm)|
|3.86 yr (1408.4 d)|
|0° 15m 20.196s / day|
|Earth MOID||0.921007 AU (137.7807 Gm)|
|Jupiter MOID||2.52287 AU (377.416 Gm)|
|Jupiter Tisserand parameter||3.437|
|10.379 h (0.4325 d)|
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.
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.
- "198 Ampella". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.
- Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus 185 (1), pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813, retrieved 2013-03-27.
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