eccentricity of parabola

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• parabola — [pə rab′ə lə] n. [ModL < Gr parabolē, lit., application, comparison (see PARABLE): it is produced by the “application” of a given area to a given straight line] Geom. a plane curve which is the path, or locus, of a moving point that remains… …   English World dictionary

• eccentricity — [ek΄sen tris′ə tē, ek΄səntris′ə tē] n. pl. eccentricities [see ECCENTRIC] 1. the state, quality, or amount of being eccentric 2. a) deviation from what is ordinary or customary, as in conduct or manner; oddity; unconventionality b) an eccentric… …   English World dictionary

• Parabola — For other uses, see Parabola (disambiguation). A parabola …   Wikipedia

• Eccentricity (mathematics) — In mathematics, the eccentricity, denoted e or varepsilon, is a parameter associated with every conic section. It can be thought of as a measure of how much the conic section deviates from being circular.In particular, * The eccentricity of a… …   Wikipedia

• Orbital eccentricity — This article is about eccentricity in astrodynamics. For other uses, see Eccentricity (disambiguation). An elliptic Kepler orbit with an eccentricity of 0.7 (red), a parabolic Kepler orbit (green) and a hyperbolic Kepler orbit with an… …   Wikipedia

• directrix — [də rek′triks; ] also [ dīrek′triks] n. pl. directrixes or directrices [dī΄rek trī′sēz] 1. Rare a woman director 2. Geom. a) a fixed line associated with a conic section and its focus and eccentricity: see PARABOLA b) the curve th …   English World dictionary

• Conic section — Types of conic sections: 1. Parabola 2. Circle and ellipse 3. Hyperbola …   Wikipedia

• Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole …   Wikipedia

• Ellipse — Elliptical redirects here. For the exercise machine, see Elliptical trainer. This article is about the geometric figure. For other uses, see Ellipse (disambiguation). Not to be confused with ellipsis. An ellipse obtained as the intersection of a… …   Wikipedia

• comet — cometary /kom i ter ee/, cometic /keuh met ik/, cometical, adj. cometlike, adj. /kom it/, n. Astron. a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and… …   Universalium

• Focus (geometry) — Point F is a focus point for the red ellipse, green parabola and blue hyperbola. In geometry, the foci (  / …   Wikipedia