longitude of perihelion
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longitude of perihelion — the heliocentric longitude of the perihelion point of a planet s or comet s orbit as usually measured along the ecliptic to the orbit s node and thence along the orbit to the perihelion point … Useful english dictionary
Longitude du périastre — En astrodynamique, la longitude du périastre, ou plus généralement la longitude du periapse, (notée ) , d un corps en orbite est la longitude (mesurée depuis le point de l équinoxe vernal) pour laquelle le périapse (point de l orbite le plus… … Wikipédia en Français
longitude — Synonyms and related words: Antarctic Zone, Arctic Circle, Arctic Zone, Cartesian coordinates, Frigid Zones, Lambert conformal projection, Mercator projection, Miller projection, Torrid Zone, Tropic of Cancer, Tropic of Capricorn, Variable Zones … Moby Thesaurus
celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… … Universalium
Apsis — For the architectural term, see Apse. Aphelion and Perihelion redirect here. For Edenbridge s Album, see Aphelion (album). Apogee and Perigee redirect here. For the literary journal, see Perigee: Publication for the Arts. For other uses, see… … Wikipedia
Earth — This article is about the planet. For other uses, see Earth (disambiguation). Earth … Wikipedia
Kreutz Sungrazers — The Kreutz Sungrazers (pronEng|ˈkrɔɪts) are sungrazing comets of a particular family. They are believed to be fragments of one large comet that broke up several centuries ago and are named for the astronomer Heinrich Kreutz, who first… … Wikipedia
Secular variations of the planetary orbits — The Secular Variations of the Planetary Orbits (French: Variations Séculaires des Orbites Planétaires, abbreviated as VSOP) is a semi analytic theory describing the long term changes (secular variation) in the orbits of the planets Mercury to… … Wikipedia
Milankovitch cycles — Past and future Milankovitch cycles. VSOP allows prediction of past and future orbital parameters with great accuracy. ε is obliquity (axial tilt). e is eccentricity. ϖ is longitude of perihelion. esin(ϖ) is the precession index, which together… … Wikipedia
2100 Ra-Shalom — The asteroid 2100 Ra Shalom was discovered in 1978 by Eleanor F. Helin. It was the second asteroid in the Aten class, after the discovery of 2062 Aten in 1976, also by Helin. The Atens have a semi major axis of less than 1 AU; of the Atens, Ra… … Wikipedia
Pasiphaë (moon) — Infobox Planet name = Pasiphaë bgcolour = #ffc0c0 discovery = yes discoverer = P. J. Melotte discovered = January 27, 1908 mean orbit radius = 24,094,770 kmcite journal |last=Jacobson |first=R. A. |authorlink=Robert A. Jacobson |title=The Orbits… … Wikipedia
