Saturn’s Moon Prometheus

Saturn’s moon Prometheus — Prometheus [pra-MEE-thee-us] is the third of Saturn’s known satellites. It was discovered from photographs taken by Voyager during its encounter with Saturn by S. Collins and others.

Prometheus acts as a shepherd satellite for the inner edge of Saturn’s F Ring.

The moon is extremely elongated about 145 by 85 by 62 kilometers (90 by 53 by 39 miles) in diameter. It has a number of ridges and valleys on its northern side.

Several craters about 20 kilometers (12 miles) in diameter are visible, but it appears to be less cratered than its nearby neighbors Pandora, Janus and Epimetheus.

The density of Prometheus has been estimated to be quite low, indicating that is a porous, icy body; however, there is a lot of uncertainty in these values.


Discovered by: S. A. Collins; D. Carlson/Voyager 1

Date of Discovery: 1980

Distance from Saturn: 139,353 km

Radius: km

Orbital Eccentricity: 0.003

Orbital Inclination: 0.0 degree

Orbital Period: 0.6130 day



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