9 Metis facts for kids
|Discovered by||A. Graham|
|Discovery date||April 25, 1848|
|Epoch July 14, 2004 (JD 2453200.5)|
|Aphelion||400.548 Gm (2.678 AU)|
|Perihelion||313.556 Gm (2.096 AU)|
|357.052 Gm (2.387 AU)|
|1346.815 d (3.69 a)|
Average orbital speed
|0.2116 d (5.078 h)|
max: 282 K (+9° C)
|8.1 to 11.83|
|0.23" to 0.071"|
Discovery and naming
Metis was found by Andrew Graham on April 25, 1848; it was his only asteroid discovery. It is also the only asteroid to have been found as a result of observations from Ireland. Its name comes from the mythological Metis, a Titaness and Oceanid, daughter of Tethys and Oceanus. The name Thetis was also considered and rejected (it would later devolve to 17 Thetis).
Metis' direction of rotation is unknown at present.
Hubble space telescope images and lightcurve analyses are in agreement that Metis has a non-spherical stretched shape with one pointed and one broad end. Radar observations suggest the presence of a significant flat area, in agreement with the shape model from lightcurves.
Light curve data on Metis led to an assumption that it could have a moon. However, subsequent observations failed to confirm this. Later searches with the Hubble Space Telescope in 1993 found no moons.
— Horizons can be used to obtain a current ephemeris.
9 Metis Facts for Kids. Kiddle Encyclopedia.