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The International Astronomical Union (IAU) Working Group for Planetary System Nomenclature has approved a new designation and name for a satellite of Saturn discovered by Cassini, cf.
IAUC 8873: Saturn LIII | Aegaeon = S/2008 S 1 | IAUC 9023.
Aegaeon is estimated to be half a kilometer in diameter, orbits within the bright segment of Saturn's G ring, and is likely a major source of the ring.
Debris knocked off the moon forms a bright arc near the inner edge, which in turn spreads to form the rest of the ring.
See also:
Newfound Moon May Be Source of Outer Saturn Ring
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