198 Ampella

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198 Ampella
Orbita asteroida 198.png
Orbital diagram
Discovery
Discovered by A. Borrelly
Discovery date13 June 1879
Designations
(198) Ampella
Pronunciation /æmˈpɛlə/
Named after
Ampelos
A879 LA; 1957 YA1
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)
TJupiter 3.437
Physical characteristics
Mean diameter
54.323±0.343  km [1]
Mass (2.62 ± 1.24/0.49)×1018 kg [2]
Mean density
3.121 ± 1.477/0.588 g/cm3 [2]
10.379  h (0.4325  d)
0.268±0.035 [1]
S
8.58 [1]

    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.

    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. [3]

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    References

    1. 1 2 3 4 "198 Ampella". JPL Small-Body Database . NASA/Jet Propulsion Laboratory. Archived from the original on 30 August 2020. Retrieved 6 May 2016.
    2. 1 2 Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1). doi: 10.1093/mnras/stz3407 .
    3. Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus, vol. 185, no. 1, pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC   2600456 , PMID   19081813.