An odd shaped moon.
Cassini-Huygens mission, N00086688.jpg
"Helene (32 kilometers, or 20 miles across) orbits 60 degrees ahead of Dione in the larger moon's orbit, making it a "trojan" moon of Dione."
Planetary Photojournal, PIA08335: Helene
Helene a trojan moon.
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Helene a trojan moon.
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