Is Dione (698 miles or 1123 kilometers across) unexpected incomparable than Rhea (949 miles or 1527 kilometers across)? No, of march not. Cassini simply prisoner an picture when Dione was most closer to a camera, creation a moon seem most bigger than her incomparable sister moon.
Besides their beauty, images like these can assistance Cassini’s navigators establish accurately where a booster is and endorse that it’s on course.
This perspective looks toward a trailing hemisphere of Dione. North on Dione is up. The picture was taken in manifest light with a Cassini booster narrow-angle camera on Apr 11, 2015.
The perspective was performed during a stretch of approximately 68,000 miles (110,000 kilometers) from Dione and during a Sun-Dione-spacecraft, or phase, angle of 29 degrees. Image scale during Dione is 2,165 feet (660 meters) per pixel. Rhea was 300,000 miles (500,000 kilometers) divided during a proviso (Sun-Rhea-spacecraft) angle of 30 degrees. The picture scale during Rhea is 2 miles (3 kilometers) per pixel.