Cassini Completes Final Close Enceladus Flyby

NASA's Cassini spacecraft paused during its final close flyby of Enceladus to focus on the icy moon's craggy, dimly lit limb, with the planet Saturn beyond. Image Credit: NASA/JPL-Caltech/Space Science Institute

NASA’s Cassini spacecraft paused during its final close flyby of Enceladus to focus on the icy moon’s craggy, dimly lit limb, with the planet Saturn beyond. Image Credit: NASA/JPL-Caltech/Space Science Institute

January 4, 2016 – NASA’s Cassini has been transmitting data and images from the mission’s final close flyby of Saturn’s active moon Enceladus. Cassini passed Enceladus at a distance of 3,106 miles (4,999 kilometers) on Saturday, December 19, at 9:49 a.m. PST (12:49 p.m. EST).

“This final Enceladus flyby elicits feelings of both sadness and triumph,” said Earl Maize, Cassini project manager at JPL. “While we’re sad to have the close flybys behind us, we’ve placed the capstone on an incredible decade of investigating one of the most intriguing bodies in the solar system.”

During its final close flyby of Saturn's moon Enceladus, NASA's Cassini spacecraft captured this view featuring the nearly parallel furrows and ridges of the feature named Samarkand Sulci. Image Credit: NASA/JPL-Caltech/Space Science Institute

During its final close flyby of Saturn’s moon Enceladus, NASA’s Cassini spacecraft captured this view featuring the nearly parallel furrows and ridges of the feature named Samarkand Sulci. Image Credit: NASA/JPL-Caltech/Space Science Institute

Cassini will continue to monitor activity on Enceladus from a distance, through the end of its mission in September 2017. Future encounters will be much farther away — at closest, more than four times farther than this latest encounter.

This was the 22nd Enceladus encounter of Cassini’s mission. The spacecraft’s discovery of geologic activity there, not long after arriving at Saturn, prompted changes to the mission’s flight plan to maximize the number and quality of flybys of the icy moon.

NASA's Cassini spacecraft peered out over the northern territory on Saturn's moon Enceladus, capturing this view of two different terrain types. A region of older terrain covered in craters that have been modified by geological processes is seen at right, while at left is a province of relatively craterless, and presumably more youthful, wrinkled terrain. Cassini acquired the view during its final close flyby of Enceladus, on Dec. 19, 2015. Image Credit: NASA/JPL-Caltech/Space Science Institute

NASA’s Cassini spacecraft peered out over the northern territory on Saturn’s moon Enceladus, capturing this view of two different terrain types. A region of older terrain covered in craters that have been modified by geological processes is seen at right, while at left is a province of relatively craterless, and presumably more youthful, wrinkled terrain. Cassini acquired the view during its final close flyby of Enceladus, on Dec. 19, 2015. Image Credit: NASA/JPL-Caltech/Space Science Institute

“We bid a poignant goodbye to our close views of this amazing icy world,” said Linda Spilker, the mission’s project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California. “Cassini has made so many breathtaking discoveries about Enceladus, yet so much more remains to be done to answer that pivotal question, ‘Does this tiny ocean world harbor life?'”

After revealing Enceladus’ surprising geologic activity in 2005, Cassini made a series of discoveries about the material gushing from warm fractures near its south pole. Scientists announced strong evidence for a regional subsurface sea in 2014, revising their understanding in 2015 to confirm that the moon hosts a global ocean beneath its icy crust.

In addition to the processed images, unprocessed, or “raw,” images appear on the Cassini mission website at:

http://saturn.jpl.nasa.gov/mission/flybys/enceladus20151219/

Additional information and multimedia products for Cassini’s final Enceladus flybys are available at:

http://solarsystem.nasa.gov/finalflybys

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. The Cassini imaging operations center is based at the Space Science Institute in Boulder, Colorado.