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Callisto is the outermost of the four Galilean moons of Jupiter. It orbits at a distance of approximately 1,880,000 km (26.3 times the 71,492 km radius of Jupiter itself). [3] This is significantly larger than the orbital radius—1,070,000 km—of the next-closest Galilean satellite, Ganymede.
Callisto's Valhalla impact crater in enhanced color as seen by Voyager. Callisto (Jupiter IV) is the fourth and last Galilean moon, and is the second-largest of the four, and at 4820.6 kilometers in diameter, it is the third largest moon in the Solar System
Vesta (radius 262.7 ± 0.1 km), the second-largest asteroid, appears to have a differentiated interior and therefore likely was once a dwarf planet, but it is no longer very round today. [74] Pallas (radius 255.5 ± 2 km ), the third-largest asteroid, appears never to have completed differentiation and likewise has an irregular shape.
This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
USGS map of Callisto. This is a list of named geological features on Callisto, a moon of Jupiter. This list is complete as of August 2022. ... Diameter (km) Approval ...
Io (1.9 nbar) and Callisto (26 pbar) have very thin atmospheres, but still enough to have collisions between atmospheric molecules. Other planetary-mass moons only have exospheres at most. [ 26 ] Exospheres have been detected around Earth's Moon, Europa, Ganymede, [ 26 ] Enceladus, [ 27 ] Dione, [ 28 ] and Rhea. [ 29 ]
It is 90 percent certain that Ceres has no moons larger than 1 km in size, assuming that they would have the same albedo as Ceres itself. [6] Eris has one large known moon, Dysnomia . Accurately determining its size is difficult: one indicative estimate of its radius is 350 ± 57.5 km .
1.593 × 10 10 km 3 ... Ganymede, and Callisto, ... with an orbital radius of about 670,900 km. With an orbital eccentricity of only 0.009, ...