Telesto (moon)

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Telesto
Telesto cassini closeup.jpg
Telesto as seen by the Cassini probe in October 2005
Discovery
Discovered by
Discovery date April 8, 1980
Orbital characteristics
294619 km
Eccentricity 0.000
1.887802 d[1]
Inclination 1.19° (to Saturn's equator)
Satellite of Saturn
Physical characteristics
Dimensions 32.6 × 23.6 × 20.0 km [2]
Mean radius
12.4±0.4 km[2]
synchronous
zero
18.7 [3]

Telesto (/tɨˈlɛst/ tə-LES-toh, Greek: Τελεστώ) is a moon of Saturn. It was discovered by Smith, Reitsema, Larson and Fountain in 1980 from ground-based observations, and was provisionally designated S/1980 S 13.[4] In the following months, several other apparitions were observed: S/1980 S 24,[5] S/1980 S 33,[6] and S/1981 S 1.[7]

In 1983 it was officially named after Telesto of Greek mythology.[a] It is also designated as Saturn XIII (13) or Tethys B.

Telesto is co-orbital with Tethys, residing in Tethys' leading Lagrangian point (L4). This relationship was first identified by Seidelmann et al. in 1981.[8] Another moon, Calypso, resides in the other (trailing) Lagrangian point of Tethys, 60 degrees in the other direction from Tethys. The Saturnian system has two additional trojan moons.

Exploration[edit]

The Cassini probe performed a distant flyby of Telesto on October 11, 2005. The resulting images show that its surface is surprisingly smooth, devoid of small impact craters.


Citations[edit]

  1. ^ Transactions of the International Astronomical Union, Vol. XVIIIA, 1982 (confirms Janus, names Epimetheus, Telesto, Calypso) (mentioned in IAUC 3872)

References[edit]

External links[edit]