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Helene
Helene , in astronomy, one of the named moons, or natural satellites, of Saturn . 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, Dione , 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." |
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"Helene." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "Helene." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1E1-Helene.html "Helene." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-Helene.html |
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Helene
Helene A satellite of Saturn, at a distance of 377 400 km; also known as Saturn XII. Helene's orbital period is 2.737 days. It shares the same orbit as the much larger satellite Dione, lying 60° ahead of it in the leading Lagrangian point. Helene is 36 × 32 × 30 km in size. It was discovered in 1980 from ground‐based observations.
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"Helene." A Dictionary of Astronomy. 1997. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "Helene." A Dictionary of Astronomy. 1997. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O80-Helene.html "Helene." A Dictionary of Astronomy. 1997. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-Helene.html |
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Hélène
Hélène ♀ (French) form of Helen, now in fairly frequent use in the English-speaking world, usually without the accents.
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PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Hélène." A Dictionary of First Names. 2006. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Hélène." A Dictionary of First Names. 2006. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O41-Hlne.html PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Hélène." A Dictionary of First Names. 2006. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O41-Hlne.html |
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Helene
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AILSA ALLABY and MICHAEL ALLABY. "Helene." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "Helene." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O13-Helene.html AILSA ALLABY and MICHAEL ALLABY. "Helene." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Helene.html |
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Helene
Helene ♀ (German) From Greek Hēlēnē. See Helen.
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Cite this article
PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Helene." A Dictionary of First Names. 2006. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Helene." A Dictionary of First Names. 2006. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O41-Helene.html PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Helene." A Dictionary of First Names. 2006. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O41-Helene.html |
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Helene
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Cite this article
PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Helene." A Dictionary of First Names. 2006. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Helene." A Dictionary of First Names. 2006. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O41-Helene1.html PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Helene." A Dictionary of First Names. 2006. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O41-Helene1.html |
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Hélène
Hélène ♀ (French) From Greek. See Helen.
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Cite this article
PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Hélène." A Dictionary of First Names. 2006. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Hélène." A Dictionary of First Names. 2006. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O41-Hlne1.html PATRICK HANKS, KATE HARDCASTLE, and FLAVIA HODGES. "Hélène." A Dictionary of First Names. 2006. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O41-Hlne1.html |
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