Southern terrain on Saturn's moon Rhea is dimly illuminated by Saturnshine in this Cassini spacecraft view of the dark side of the moon.
The spacecraft's camera is looking toward the night side of Rhea (1,528 kilometers, or 949 miles across), but sunlight reflected off the day side of immense Saturn is bright enough to illuminate the craters seen here. This view is centered on terrain at 23 degrees south latitude, 315 degrees west longitude.
Four background stars are visible.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on August 1, 2011. The view was obtained at a distance of approximately 6,000 kilometers (3,700 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 113 degrees. Scale in the original image was 800 meters (2,600 feet) per pixel. The image was contrast enhanced and magnified by a factor of 1.5 to enhance the visibility of surface features.
Photo credit: NASA/JPL-Caltech/Space Science Institute
A quintet of Saturn's moons come together in the Cassini spacecraft's field of view for this portrait.
Janus (179 kilometers, or 111 miles across) is on the far left. Pandora (81 kilometers, or 50 miles across) orbits between the A ring and the thin F ring near the middle of the image. Brightly reflective Enceladus (504 kilometers, or 313 miles across) appears above the center of the image. Saturn's second largest moon, Rhea (1,528 kilometers, or 949 miles across), is bisected by the right edge of the image. The smaller moon Mimas (396 kilometers, or 246 miles across) can be seen beyond Rhea also on the right side of the image.
This view looks toward the northern, sunlit side of the rings from just above the ringplane. Rhea is closest to Cassini here. The rings are beyond Rhea and Mimas. Enceladus is beyond the rings.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on July 29, 2011. The view was acquired at a distance of approximately 1.1 million kilometers (684,000 miles) from Rhea and 1.8 million kilometers (1.1 million miles) from Enceladus. Image scale is 7 kilometers (4 miles) per pixel on Rhea and 11 kilometers (7 miles) per pixel on Enceladus.
Photo credit: NASA/JPL-Caltech/Space Science Institute
