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Helene
Related Category: Astronomy: General
(hln´, hl´n), in astronomy, one of the 18 named moons, or natural satellites, of Saturn.
Helene
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Essential reading Compare
side-by-side A Dictionary of Astronomy A Dictionary of Earth Sciences The Columbia Encyclopedia, ...
Voyager 2 image of Helene.
External links
*The Planetary Society: Helene
Related Articles ...
Helene
Saturn XII - 1980S6
Helene was discovered by P. Laques and J. Lecacheus in 1980 through ground based observations.
Helene
Saturn XII
Helene is the thirteenth of Saturn's known satellites: orbit: 377,400 km diameter: 33 km (36 x 32 x 30) mass: ?
Helene von Druskowitz was an Austrian philosopher, writer and music critic. She was the second woman to obtain a Doctorate in Philosophy, which she obtained in Z?rich....
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Helene, a small moon of Saturn, peeks into view at the corner of this recent image from the Cassini spacecraft, with Saturn itself in the background. Helene is a small chunk of rock and ice.
Helene is the thirteenth of Saturn's moons. It was discovered by Lecacheux and Laques in 1980. Not much is known about this moon.
Helene was an Amazon who fought with Achilles, in Greek Mythology.
Rhea ...
Helene
Discovered: P. Laques & J. Lecacheus, 1980
Distance from Saturn: 377,400 km (leads Dione) ...
Helene (NASA Thesaurus) A natural satellite of Saturn orbiting at a mean distance of 377,400 kilometers. helical antenna (NASA Thesaurus / NASA SP-7, 1965) An antenna used where circular polarization is required.
SATURN S_RINGS SYSTEM MIMAS ENCELADUS TETHYS DIONE RHEA TITAN HYPERION IAPETUS PHOEBE JANUS EPIMETHEUS PANDORA CALYPSO HELENE TELESTO or SATURN S_RINGS SYSTEM MIMAS ENCELADUS TETHYS DIONE RHEA TITAN HYPERION IAPETUS PHOEBE JANUS EPIMETHEUS PANDORA ...
The Saturnian moon Dione also has two Lagrangian co-orbitals, Helene at its L4 point and Polydeuces at L5.
Next out are Enceladus, Tethys, Telesto, Calypso, Helene, Dione, and Rhea (right). Dione looks very much like our moon, except that it contains ice. Tethys, Telesto, and Calypso all share the same orbit.
The others are Phoebe, Helene, Telesto, Calypso, and 15 yet to receive names.
Lists of Natural Satellites and Rings around Saturn
Rings of Saturn
RING ...
The moon Helene is similarly tied to Dione. These 60° points are known as Lagrange points, after the French mathematician Joseph Louis Lagrange, who first studied them.
Some of the names are possibly familiar to you - Pan, Daphnis, Atlas, Prometheus, Pandora, Epimetheus, Janus, Mimas, Methone, Pallene, Enceladus, Tethys, Telesto, Calypso, Dione, Helene, Polydeuces, Rhea, Titan, Hyperion, Iapetus, Kiviuq, Ijiraq, ...
In 1980 three additional Saturnian moons were discovered from the ground and later confirmed by the Voyager probes. They are trojan moons of Dione (Helene) and Tethys (Telesto and Calypso).
Saturn's known moons are (from nearest to furthest from the planet): Pan, Atlas, Prometheus, Pandora, Epimetheus, Janus, Mimas, Enceladus, Tethys, Telesto, Calypso, Dione, Helene, Rhea, Titan, Hyperion, Iapetus, and Phoebe.
This name derives from a generalization of the names of some of the largest asteroids in Jupiter's Lagrange points: 588 Achilles, 624 Hektor, and 911 Agamemnon. Saturn's satellites Helene, Calypso and Telesto are also sometimes called Trojans.
An object orbiting in the Lagrange points of another (larger) object. This name derives from a generalization of the names of some of the largest asteroids in Jupiter's Lagrange points. Saturn's moons Helene, ...
including Titan (the largest), Rhea, Iapetus, Dione, Tethys, Enceladus, Mimas, Hyperion, Phoebe, Janus, Epimetheus, Pandora, Prometheus, Helene, Telesto, Atlas, Calypso, and Pan (the smallest named moon of Saturn).
Such objects are Telesto and Calypso, which are the leading and following companions respectively of Tethys; and Helene and Polydeuces, which are the leading and following companions of Dione.
Asteroid satellites ...
Other examples of Trojan bodies in the solar system include daughter satellites that orbit in the Trojan points of the Saturn-Tethys system, and an additional satellite (Helene) which orbits in the forward Trojan point of Saturn and Dione.
 See also: Saturn, Earth, Solar, Dione, Titan
  
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