After a couple of years in high-inclination orbits that limited its ability to encounter Saturn’s moons, NASA’s Cassini spacecraft returned to Saturn’s equatorial plane in March 2015. Image: Rhea. Credit: NASA/JPL-Caltech/Space Science InstituteA dual view of Saturn‘s icy moon Rhea marks the return of NASA’s Cassini spacecraft to the realm of the planet’s icy satellites. This follows nearly two years during which the spacecraft’s orbits carried it high above the planet’s poles. Those paths limited the mission’s ability to encounter the moons, apart from regular flybys of Titan.
Cassini’s orbit will remain nearly equatorial for the remainder of 2015, during which the spacecraft will have four close encounters with Titan, two with Dione and three with the geyser-moon, Enceladus.
Titan is Saturn’s largest moon. It is surrounded by a thick, hazy golden atmosphere of mostly nitrogen, with some methane, and hydrocarbons. Credit: NASA/JPL/Space Science Institute
Dione’s features include heavily cratered terrain with craters as large as 100 km (62 miles) across, moderately cratered plains, lightly cratered plains and fractured areas. Credit: NASA/JPL/Space Science Institute
Enceladus is one of the most scientifically compelling bodies in our solar system. The moon displays at least five different types of terrain, and has geysers of water vapor that gush out to a distance of three times the moons radius. Credit: Cassini Imaging Team, SSI, JPL, ESA, NASAThe two views of Rhea were taken about an hour-and-a-half apart on Feb. 9, 2015, when Cassini was about 30,000 to 50,000 miles (50,000 to 80,000 kilometers) away from the moon. Cassini officially began its new set of equatorial orbits on March 16.
The views show an expanded range of colors from those visible to human eyes in order to highlight subtle color variations across Rhea’s surface. In natural color, the moon’s surface is fairly uniform. The image at right represents the highest-resolution color view of Rhea released to date.
The Cassini-Huygens mission is a cooperative project of NASA, ESA (European Space Agency) and the Italian Space Agency. NASA’s Jet Propulsion Laboratory in Pasadena, California, manages the mission for the agency’s Science Mission Directorate in Washington. JPL is a division of the California Institute of Technology in Pasadena. The Cassini imaging operations center is based at the Space Science Institute in Boulder, Colorado.
Simulation of the Cassini Spacecraft on April 11, 2015 from NASA Eyes on the Solar System app.More information about Cassini, visit:http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov
Media Contacts
Preston Dyches
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-7013
preston.dyches@jpl.nasa.gov
Steve Mullins
Space Science Institute, Boulder, Colo.
720-974-5859
media@ciclops.org
Source: JPL Press Release 2015-103
