The northern and southern hemispheres of Saturn's moon Rhea are seen in these polar stereographic maps, mosaicked from the best-available images obtained by NASA's Cassini and Voyager spacecraft.
These maps are updates to the versions released in February 2010 (see PIA12562 and PIA12563). The titles of those older versions ("Rhea Polar Maps - February 2010") denote the month the maps were released, not when the data in the maps were collected. The title of this new version reflects when the most recent data used in the map were captured. The newest data were used to improve coverage north of the equator between about 250 degrees west longitude and 300 degrees west longitude.
Six Voyager images fill in gaps in Cassini's coverage of the moon's north pole.
Each map is centered on one of the poles, and surface coverage extends to the equator. Grid lines show latitude and longitude in 30-degree increments. The scale in the full-size versions of these maps is 417 meters (1,400 feet) per pixel. The mean radius of Rhea used for projection of these maps is 764.1 kilometers (474.8 miles).
The Cassini Solstice Mission is a joint United States and European endeavor. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter was designed, developed and assembled at JPL. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo.