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| satellite_of = Uranus | physical_characteristics = yes | mean_radius = 36 km (estimate)〔 | surface_area = ~16,000 km² (estimate) | volume = ~200,000 km³ (estimate) | mass = ~2.5 kg (estimate) | surface gravity = ~0.02 m/s² (estimate) | escape velocity = ~0.031 km/s (estimate) | density = ~1.3 g/cm³ (assumed) | rotation = 2.7h〔 | axial_tilt = ? | albedo = 0.04 (assumed) | single_temperature = ~65 K (estimate) }} Caliban ( or ) is the second-largest retrograde irregular satellite of Uranus. It was discovered on 6 September 1997 by Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, and John J. Kavelaars using the 200-inch Hale telescope together with Sycorax and given the temporary designation S/1997 U 1. Designated Uranus XVI, it was named after the monster character in William Shakespeare's play ''The Tempest''. == Orbit == Caliban follows a distant orbit, more than 10 times further from Uranus than the furthest regular moon Oberon. Its orbit is retrograde, moderately inclined and slightly eccentric. The orbital parameters suggest that it may belong to the same dynamic cluster as Stephano and Francisco, suggesting common origin. The diagram illustrates the orbital parameters of the retrograde irregular satellites of Uranus (in polar co-ordinates) with the eccentricity of the orbits represented by the segments extending from the pericentre to the apocentre. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Caliban (moon)」の詳細全文を読む スポンサード リンク
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