Helene

Helene
Helene Cassini passed within 36,000 kilometers of Helene to take this image on July 20, 2007. Helene is the leading co-orbital companion to Dione and is a small, irregular body measuring approximately 36 by 32 by 30 kilometers in size. This image has been enlarged by a factor of two. NASA / JPL-Caltech / SSI