Metis (moon)
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| Discovery | |||||||
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| Discovered by | S. Synnott | ||||||
| Discovered on | March 4, 1979 | ||||||
| Orbital characteristics | |||||||
| Mean radius | 127,691 km (0.000854 AU) | ||||||
| Eccentricity | 0.0012 | ||||||
| Periastron | 127,540 km (0.000853 AU) | ||||||
| Apastron | 127,840 km (0.000855 AU) | ||||||
| Revolution period | 0.294780 d (7 h 4.5 min) | ||||||
| Orbital circumference | 802,300 km (0.005 AU) | ||||||
| Orbital velocity | max: 31.539 km/s mean: 31.501 km/s min: 31.464 km/s | ||||||
| Inclination | 25.51° (to the ecliptic) 0.00° (to Jupiter's equator) | ||||||
| Is a satellite of | Jupiter | ||||||
| Physical characteristics | |||||||
| Mean diameter | 43 km | ||||||
| Surface area | ~5800 km2 | ||||||
| Volume | ~41600 km3 | ||||||
| Mass | 1.2×1017 kg | ||||||
| Mean density | 3.0 g/cm3 | ||||||
| Surface gravity | 0.016 m/s2 (0.002 g) | ||||||
| Escape velocity | 0.027 km/s | ||||||
| Rotation period | synchronous | ||||||
| Rotation velocity | 19 km/h | ||||||
| Axial tilt | zero | ||||||
| Albedo | 0.06 | ||||||
| Surface temp. |
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| Atmospheric pressure | 0 kPa | ||||||
Metis (mee'-tis, Greek Μήτις) is the innermost member of the Amalthea group of Jupiter's small inner moons.
The moon was discovered in 1979 by the Voyager 1 probe and was designated S/1979 J 3. In 1983 it was officially named after the mythological Metis, a Titaness who was the first wife of Zeus and the mother of Athena. It is also designated Jupiter XVI.
Metis lies within Jupiter's main planetary ring, and may be the source of the material that comprises it. Its orbit lies inside Jupiter's synchronous orbit radius (as does Adrastea's), and as a result, tidal forces are slowly causing its orbit to decay. It is also within its density's fluid Roche limit, but not its rigid Roche limit, and so avoids tidal disruption.
Not to be confused with the asteroid 9 Metis.
| Jupiter's natural satellites edit (https://academickids.com:443/encyclopedia/index.php?title=Template:Jupiter_Footer&action=edit) |
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| Metis | Adrastea | Amalthea | Thebe | Io | Europa | Ganymede | Callisto | Themisto | Leda | Himalia | Lysithea | Elara | S/2000 J 11 | Carpo | S/2003 J 12 | Euporie | S/2003 J 3 | S/2003 J 18 | Thelxinoe | Euanthe | Helike | Orthosie | Iocaste | S/2003 J 16 | Ananke | Praxidike | Harpalyke | Hermippe | Thyone | Mneme | S/2003 J 17 | Aitne | Kale | Taygete | S/2003 J 19 | Chaldene | S/2003 J 15 | S/2003 J 10 | S/2003 J 23 | Erinome | Aoede | Kallichore | Kalyke | Eurydome | S/2003 J 14 | Pasithee | Cyllene | Eukelade | S/2003 J 4 | Hegemone | Arche | Carme | Isonoe | S/2003 J 9 | S/2003 J 5 | Pasiphaë | Sinope | Sponde | Autonoe | Callirrhoe | Megaclite | S/2003 J 2 |
| Amalthea group | Galilean moons | Himalia group | Ananke group | Carme group | Pasiphaë group |
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