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'''Amalthea''' is an inner irregular satellite of [[Jupiter]], measuring 250 km across and is noted for its red color.
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Amalthea is an inner irregular satellite of jupiter, measuring 250 km across and is noted for it's red color.
<br>
 
Amalthea was discovered by Edward Emerson Barnard on 9 September 1892, named after a nymph in Greek mythology.
 
 
 
Discovery              E. E. Barnard, 9 September 1892<br>
 
[[Primary body]]          Jupiter<br>
 
[[Periapsis]]              181150 km<br>
 
[[Apoapsis]]              182840 km<br>
 
[[Mean orbit radius]]      181365.84 km<br>
 
[[Eccentricity]]          0.00319<br>
 
[[Orbital period]]        11h57m23s (0.49817943d)<br>
 
[[Average orbital speed]]  26.57 km/s<br>
 
[[Inclination]]            0.374° (to Jupiter's equator)<br>
 
'''PHYSICAL CHARACTERISTICS'''<br>
 
Dimensions            250×146×128 km<br>
 
[[Mean radius]]            83.5 km<br>
 
[[Volume ]]                2.43×10<sup>6</sup> km<sup>3</sup><br>
 
[[Mass]]                  2.08×10<sup>18</sup> kg<br>
 
[[Mean density]]          0.857 g/cm<sup>3</sup><br>
 
[[Surface gravity]]      0.02 m/s<sup>2</sup><br>
 
[[Escape velocity]]        0.058 km/s<br>
 
[[Rotation period]]        synchronous<br>
 
[[Axial tilt]]            zero<br>
 
[[Albedo]]                0.09 <br>
 
Mean surface temperature  120°K<br>
 
Apparent [[magnitude]] from Earth 14.1<br>
 
 
 
[[Category: Articles]]
 
[[Category: Celestial bodies]]
 
[[Category: Natural satellites]]
 
[[Category: Satellites of Jupiter]]
 
[[Category: Stubs]]
 
{{JupiterSat}}
 

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