198 Ampella
| Discovery | |
|---|---|
| Discovered by | A. Borrelly, 1879 |
| Discovery date | 13 June 1879 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| 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) | |
| Eccentricity | 0.22788 |
| 3.86 yr (1408.4 d) | |
| 131.10° | |
| 0° 15m 20.196s / day | |
| Inclination | 9.3113° |
| 268.45° | |
| 88.586° | |
| Earth MOID | 0.921007 AU (137.7807 Gm) |
| Jupiter MOID | 2.52287 AU (377.416 Gm) |
| Jupiter Tisserand parameter | 3.437 |
| Physical characteristics | |
Mean radius | 28.58±1.4 km |
| 10.379 h (0.4325 d) | |
| 0.2517±0.027 | |
| S | |
| 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.[2]
References
- ↑ "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.
