|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)|
|10.379 h (0.4325 d)|
Ampella (minor planet designation: 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.