This image was taken on March 29, 2012 and received on Earth March 29, 2012. The camera was pointing toward RHEA at approximately 415,697 kilometers away, and the image was taken using the MT3 and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This image was taken on March 29, 2012 and received on Earth March 29, 2012. The camera was pointing toward RHEA at approximately 439,453 kilometers away, and the image was taken using the CL1 and BL1 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This image was taken on April 20, 2012 and received on Earth April 21, 2012. The camera was pointing toward RHEA at approximately 1,796,862 kilometers away, and the image was taken using the RED and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This Image was taken on April 20, 2012 and received on Earth April 21, 2012. The camera was pointing toward RHEA at approximately 1,796,067 kilometers away, and the image was taken using the BL1 and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This image was taken on April 20, 2012 and received on Earth April 21, 2012. The camera was pointing toward RHEA at approximately 1,795,436 kilometers away, and the image was taken using the RED and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This image was taken on April 20, 2012 and received on Earth April 21, 2012. The camera was pointing toward RHEA at approximately 1,794,815 kilometers away, and the image was taken using the CL1 and GRN filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This image was taken on April 20, 2012 and received on Earth April 21, 2012. The camera was pointing toward RHEA at approximately 1,794,202 kilometers away, and the image was taken using the BL1 and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute

This image was taken on April 20, 2012 and received on Earth April 21, 2012. The camera was pointing toward RHEA at approximately 1,793,145 kilometers away, and the image was taken using the RED and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image Credit: NASA/JPL/Space Science Institute