Anthe (moon)
Anthe is the bright dot in the center
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| Discovery | |
|---|---|
| Discovered by | Cassini Imaging Team [1] |
| Discovery date | May 30, 2007 |
| Orbital characteristics [2] | |
| 197,700 km | |
| Eccentricity | 0.001 |
| 1.03650 d | |
| Inclination | 0.1° to Saturn's equator |
| Satellite of | Saturn |
| Physical characteristics | |
| Dimensions | 2 km [3] |
| Mass | 5×1012 kg[lower-alpha 1] |
| assumed synchronous | |
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Anthe (/ˈænθiː/ AN-thee;[lower-alpha 2] 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.[4]
It was discovered by the Cassini Imaging Team[1] in images taken on 30 May 2007.[2] Once the discovery was made, a search of older Cassini images revealed it in observations from as far back as June 2004. It was first announced on 18 July 2007.[2]
Anthe is visibly affected by a perturbing 10:11 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.
Material blasted off Anthe by micrometeoroid impacts is thought to be the source of the Anthe Ring Arc, a faint partial ring about Saturn co-orbital with the moon first detected in June 2007.[5][6]
References
Explanatory
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External links
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- ↑ 1.0 1.1 Cassini Imaging Team.
- ↑ 2.0 2.1 2.2 IAUC 8857.
- ↑ [1]
- ↑ Agle 2007.
- ↑ Porco et al., 2008.
- ↑ Hedman et al., 2009.
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