Pandora [pan-DOR-uh] is the fourth of Saturn's known satellites. It was discovered from photographs taken by Voyager during its encounter with Saturn by S. Collins and others. Pandora is the outer shepherd satellite for Saturn's F-ring. It has a diameter of about 114 by 84 by 62 kilometers (71 by 52 by 38 miles) and appears to be very heavily cratered. The two largest craters are about 30 kilometers (19 miles) in diameter. No linear valleys or ridges are visible. Very limited data is available to analyze Pandora.
Discovered by S. Collins & others
Date of discovery 1980
Mass (kg) 2.2e+17*
Mass (Earth = 1) 3.6814e-08
Radius (km) 57x42x31
Radius (Earth = 1) 8.9370e-03
Mean density (gm/cm^3) 0.7*
Mean distance from Saturn (km) 141,700
Rotational period (days) ?
Orbital period (days) 0.6285
Mean orbital velocity (km/sec) 16.40
Orbital eccentricity 0.004
Orbital inclination (degrees) 0.0
Escape velocity (km/sec) 0.0227
Visual geometric albedo 0.9
Magnitude (Vo) 16.5
|Views of Pandora|
This image of Pandora was acquired by the Voyager 2 spacecraft on August 25, 1981. (Credit: Calvin J. Hamilton)
Shaded Map of Pandora
This is a shaded relief map of Pandora, the outer F Ring shepherd satellite of Saturn. As with all maps, it is the cartographer's interpretation and not all features are necessarily certain given the limited data available. This interpretation stretches the data as far as is feasible. The leading side faces forwards in the orbit of Pandora. The trailing side faces backwards along the orbit. Longitude 0 is at the righthand end of the leading side, and faces Saturn. As with all conformal (true shape) projections, the scale in these maps varies, increasing from the center to the outer edge. (Courtesy Phil Stooke).
Prometheus and Pandora
This image shows Prometheus and Pandora next to Saturn's F-ring. (Courtesy NASA/JPL)
Stooke, P. J., "Shapes and Surface Features of Prometheus and Pandora," Earth, Moon and Planets, 62 (1993), 199-221.
Saturn Prometheus Epimetheus
Copyright © 1997 by Calvin J. Hamilton. All rights reserved.