Discovery images of Anthe
|Discovered by||CICLOPS Team |
|Discovery date||May 30, 2007|
|Orbital characteristics |
|Semi-major axis||197,700 km|
|Orbital period||1.03650 d|
|Inclination||0.1° to Saturn's equator|
|Mass||5 ×1012 kg [a]|
|Equatorial surface gravity||unknown|
|Rotation period||assumed synchronous|
Anthe (pron.: // AN-thee;[b] Greek: Άνθη) is a very small natural satellite of Saturn lying between the orbits of Mimas and Enceladus. It is also known as Saturn XLIX; its provisional designation was S/2007 S 4. It is named after one of the Alkyonides; the name means flowery. It is the sixtieth confirmed moon of Saturn.
It was discovered by the Cassini Imaging Team in images taken on May 30, 2007. Once the discovery was made, a search of older Cassini images revealed this small satellite in observations from as far back as June 2004. It was first announced on July 18, 2007.
Anthe is visibly affected by a perturbing mean-longitude resonance with the much larger Mimas. This causes its osculating orbital elements to vary with an amplitude of about 20 km in semi-major axis on a timescale of about 2 Earth years. The close proximity to the orbits of Pallene and Methone suggests that these moons may form a dynamical family.
Media related to Anthe at Wikimedia Commons
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