Helene


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Helene

(həlēn`, hĕl`ənə), in astronomy, one of the named moons, or natural satellites, of SaturnSaturn,
in astronomy, 6th planet from the sun. Astronomical and Physical Characteristics of Saturn

Saturn's orbit lies between those of Jupiter and Uranus; its mean distance from the sun is c.886 million mi (1.
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. Also known as Saturn XII (or S12), Helene is an irregularly shaped (nonspherical) body measuring about 22 mi (36 km) by 20 mi (32 km) by 18 mi (30 km); it orbits Saturn at a mean distance of 234,500 mi (377,400 km) and has an orbital period of 2.7369 earth days—the rotational period is unknown but is assumed to be the same as the orbital period. It was discovered by French astronomers P. Laques and J. Lecacheaux in 1980 during ground-based observations of Saturn. Another moon, DioneDione
, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IV (or S4), Dione is 695 mi (1,120 km) in diameter, orbits Saturn at a mean distance of 234,500 mi (377,400 km), and has an orbital period of 2.
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, is co-orbital with Helene; that is, Helene orbits Saturn at the same distance as Dione but precedes Dione by about 60°. Before the present name was adopted, the moon was referred to as "Dione-B" and "Electra."

Helene

(he-lee -nee) A small irregularly shaped satellite of Saturn, discovered in 1980. Helene is a coorbital satellite with Dione. See Table 2, backmatter.
References in periodicals archive ?
For her efforts, Helene was presented with the insignia of Knight of the Legion d'Honneur by Colonel Armel Dirou, military attache at the French Embassy.
, After that point, the glacier could lose all its ice in 150 years DR HELENE SEROUSSI NASA SCIENTIST
PS Helene Darroze at the Connaught has a weekday lunch menu, with three courses and two glasses of wine for PS60; go to theconnaught.co.uk for more info.
As afternoon fades to night and selections from the singer's recordings play in the background, Helene shares her story in Orlandersmith's gentle, perceptive meditation on life and loss.
A satellite image showing tropical storm Florence, upper left, in the Atlantic Ocean on Tuesday, storm Isaac and hurricane Helene
A spokesman for the Met Office said Helene could fell a few trees, which could bring disruption to transport links and those in coastal areas are warned to be wary of large waves hitting the seafront.
Storm Helene is an intense area of low pressure and bringing some tropical weather with it.
A spokesman for the Met Office said Helene could fell a few trees, which could bring disruption to transport links, but did not think it would reach the 70mph winds originally predicted.
However unlike other storms Helene is set to bring with it warm tropical air, causing temperatures to rise to mid 20 degrees Celsius.
In the warning, forecasters say: "Storm Helene is expected to move northeastwards across the British Isles later Monday and early Tuesday before clearing into the northern North Sea by early Tuesday morning.
Grahame Madge said: "The UK's weather will come under the influence of ex-hurricane Helene, although there are other systems in the Atlantic which may modify this particular one.