It was discovered in 1610 by Galileo Galilei. It is the third moon of the whole solar system and the second largest of the Jupiter's Jovian system, after Ganymede. Callisto has about 99% of Mercury's diameter, but only about a third of its mass. It is the fourth Galilean moon as distance from Jupiter, at an orbital radius of about 1,880,000 km.
Video by: Victor Lupu
Optics: Celestron C8"-Newtonian telescope, plossl 20mm, 2x Barlow
Mount: CG5 (EQ5)
Device: Sony CX105 at 7x optical zoom
Total magnification: 700x
Video resolution: 1920x1080
Filter: No
Date: 29/08/2011
Location: Baia Mare, Romania
Editing: Video stabilized in Sony Vegas 10
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