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Callisto
Click image for description
|
| Discovery
|
| Discovered by
| S. Marius
G. Galilei
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| Discovered in
| 1610
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| Orbital characteristics
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| Mean radius
| 1.883×106 km
|
| Eccentricity
| 0.007
|
| Revolution period
| 16 day 16 h 32.2 min
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| Inclination
| 0.281°
|
| Is a satellite of
| Jupiter
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| Physical characteristics
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| Mean diameter
| 4820.6 km
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| Surface area
| 7.2 ×107 km2
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| Mass
| 1.076×1023 kgThe kilogram (symbol: kg is the SI base unit of mass. A gram is defined as one thousandth of a kilogram. Conversion of units describes equivalent units of mass in other systems. Multiples SI prefixes are used to name multiples and subdivisions of the kilo
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| Mean densityFor other meanings of density, see density (disambiguation Density (symbol: rho Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass div
| 1.851 g/cm3
|
| Surface gravityThis article covers the physics of gravitation. See also gravity (disambiguation). Gravitation is the tendency of masses to move toward each other. The first mathematical formulation of the theory of gravitation was made by Sir Isaac Newton and proved ast
| 1.24 m/s2In physics, acceleration (symbol: a is defined as the rate of change (or time derivative) of velocity. It is thus a vector quantity with dimension length/ time˛. In SI units, this is metre/second˛. To accelerate an object is to change its velocity over a
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Surface Gravity
(Earth = 1)
| 0.1265
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| Rotation period
| 16 day 16 h 32.2 min
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| Axial tiltAxial tilt is an astronomical term regarding the inclination angle of a planet's rotation axis in relation to its orbital plane. It is also called obliquity . A planet whose rotation axis were perpendicular to the orbital plane would have an axial tilt of
| °
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| AlbedoNote: This article discusses the physical or planetological property of albedo. For other usage, see Albedo (disambiguation). The albedo is a measure of reflectivity of a surface or body. It is the ratio of electromagnetic radiation reflected to the amoun
| 0.20
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| Surface temp.Temperature is the physical property of a system which underlies the common notions of "hot" and "cold"; the material with the higher temperature is said to be hotter. General description The formal properties of temperature are studied in thermodynamics.
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| min | mean | max
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| KThe kelvin (symbol: K is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvin is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273. 16 of the thermodynamic temperature o
| K
| K
|
|
| Atmospheric characteristics
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| Atmospheric pressure
| trace
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| Carbon dioxide
| 100%
|
Callisto is a moon of the planet Jupiter, discovered in 1610 by Galileo Galilei. It is the third-largest moon in the solar system, about the same size as the planet Mercury. It is named after Callisto, one of Zeus's many love interests in Greek mythology.
Although the name "Callisto" was suggested by Simon Marius soon after its discovery, this name and the names of the other Galilean satellites curiously fell into disfavor for a considerable time, and was not revived in common use until the mid 20th century. In much of the earlier astronomical literature, it is simply referred to by its Roman numeral designation as "Jupiter IV" or as the "fourth satellite of Jupiter".
