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{{wiktionary|eccentric|eccentricity}}
In ], '''eccentricity''' is a parameter associated with every ]. It can be thought of as a measure of how much the conic section deviates from being circular. In particular:
* The eccentricity of a ] is zero.
* The eccentricity of an ] is greater than zero and smaller than 1
* The eccentricity of a ] is 1.
* The eccentricity of a ] is greater than 1.


'''Eccentricity''' or '''eccentric''' may refer to:
To calculate the eccentricity of any ellipse, measure the semi-major axis and call it ''a''. Measure the semi-minor axis and call that measurement ''b''. Now:
:eccentricity = ''e'' = &radic;( 1 - ''b''<sup>2</sup>/''a''<sup>2</sup>)
where &radic; is the ] sign.
In ], the eccentricity of an ] can be calculated using this formula.


* ], odd behavior on the part of a person, as opposed to being "normal"
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{{toc_right}}
In popular usage, eccentricity refers to unusual or odd behavior on the part of a person.

==Mathematics, science and technology==
===Mathematics===
* Off-], in geometry
* ] of a vertex in a graph
* ], a parameter associated with every conic section

===Orbital mechanics===
* ], in astrodynamics, a measure of the non-circularity of an orbit
* ], the angle between the direction of periapsis and the current position of an object on its orbit
* ], in celestial mechanics, a dimensionless vector with direction pointing from apoapsis to periapsis
* Eccentric, a type of ], a circle or sphere used in obsolete epicyclical systems to carry a planet around the Earth or Sun

===Other uses in science and technology===
* ], a wheel that rotates on an axle that is displaced from the focus of the circle described by the wheel
* ], in vision, degrees of visual angle from the center of the eye
* ], the lengthening of muscle fibers
* Eccentric position of a ] tripod, to be able to measure hidden points
* ], the motion of an active muscle while it is lengthening under load
* Eccentricity, a deviation from ]

==Other uses==
* ], a London gentlemen's club
* '']''
* '']''

== See also ==
* {{lookfrom|eccentric}}
* {{intitle|eccentric*}}
* ]

{{disambiguation}}
]

Latest revision as of 01:13, 29 June 2021

Eccentricity or eccentric may refer to:

Mathematics, science and technology

Mathematics

Orbital mechanics

  • Orbital eccentricity, in astrodynamics, a measure of the non-circularity of an orbit
  • Eccentric anomaly, the angle between the direction of periapsis and the current position of an object on its orbit
  • Eccentricity vector, in celestial mechanics, a dimensionless vector with direction pointing from apoapsis to periapsis
  • Eccentric, a type of deferent, a circle or sphere used in obsolete epicyclical systems to carry a planet around the Earth or Sun

Other uses in science and technology

Other uses

See also

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