A Trojan moon is a natural satellite of a planet occupying the L4 or L5 equilateral Lagrangian points of a primary-moon system. They are named by analogy with the Trojan asteroids, which occupy the L4 and L5 points of the Sun-Jupiter system. Moons of solar system scaled to Earths Moon The common noun moon (not capitalized) is used to mean any natural satellite of the other planets. ... A planet (from the Greek πλανήτης, planētēs which means wanderer or more forcefully vagrant, tramp) is an object in orbit around a star that is not a star in its own right. ... The Lagrangian points, (also Lagrange point, L-point, or libration point) are the five positions in space where a small object can be stationary with respect to two larger objects (such as a satellite with respect to the Earth and Moon). ... Image of the Trojan asteroids in front of and behind Jupiter along its orbital path. ... The Sun is the star at the centre of our Solar system. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...
Four examples are known, all in Saturn's system: Telesto and Calypso bracket Tethys, whilst Helene and the newly discovered Polydeuces bracket Dione. The Earth-Moon points have been repeatedly searched for Trojans, but nothing else than a slight overabundance of dust has ever been found. Atmospheric characteristics Atmospheric pressure 140 kPa Hydrogen >93% Helium >5% Methane 0. ... Atmosphere none Telesto (te-les-toe, Greek Τελεστώ) is a moon of Saturn. ... Atmosphere none Calypso (ka-lip-soe, Greek Καλυψώ) is a moon of Saturn. ... Atmosphere none Tethys (tee-this or teth-is, Greek ΤηθÏÏ‚) is a moon of Saturn that was discovered by Giovanni Domenico Cassini in 1684. ... Helene (hel-e-nee, Greek ‘ΕλÎνη) is a moon of Saturn. ... Atmosphere none Polydeuces (pol-ee-dew-seez, Greek ΠολυδεÏκης) is a natural satellite of Saturn that was discovered on images taken on October 21, 2004 by the Cassini imaging team, led by Carolyn C. Porco et al, and given the temporary designation S/2004 S 5. ... Atmosphere none Dione (dye-oe-nee, Greek Διώνη) is a moon of Saturn discovered by Giovanni Cassini in 1684. ... Earth - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... Crust composition Oxygen 43% Silicon 21% Aluminium 10% Calcium 9% Iron 9% Magnesium 5% Titanium 2% Nickel 0. ...
Telesto [tah-LESS-toh] and Calypso [ka-LIP-so] are called the TethysTrojans because they circle Saturn in the same orbit as Tethys, about 60 degrees ahead of and behind that body.
Telesto is the leading Trojan and Calypso is the trailing Trojan.
The image was taken with the Cassini spacecraft narrow-angle camera on October 11, 2005, at a distance of approximately 10,424 kilometers from Telesto.
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