Misplaced Pages

Eccentricity: Difference between revisions

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Browse history interactively← Previous editContent deleted Content addedVisualWikitext
Revision as of 09:28, 19 June 2003 edit217.158.203.146 (talk) ...sometimes thought to be a sign of genius. However, many eccentrics are cranks, rather than geniuses.← Previous edit Latest revision as of 01:13, 29 June 2021 edit undoKirby777 (talk | contribs)Extended confirmed users6,824 editsm →Other uses: formatting 
(179 intermediate revisions by more than 100 users not shown)
Line 1: Line 1:
{{wiktionary|eccentric|eccentricity}}
]


'''Eccentricity''' or '''eccentric''' may refer to:
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.
* The eccentricity of a ] is ].


* ], odd behavior on the part of a person, as opposed to being "normal"
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:
{{toc_right}}


==Mathematics, science and technology==
:eccentricity = ''e'' = &radic;( 1 - ''b''<sup>2</sup>/''a''<sup>2</sup>)
===Mathematics===
where &radic; is the ] sign.
* Off-], in geometry
In ], the eccentricity of an ] can be calculated using this formula. For example, the eccentricity of the ]'s orbit is 0.0167.
* ] 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
In popular usage, '''eccentricity''' refers to unusual or odd ] on the part of a person, as opposed to being ]. Eccentric behavior is often considered whimsical or quirky, although it can also be strange and disturbing. American millionaire ], for example was considered to be very eccentric, and stored his ] in glass jars and never cut his hair or nails. Other people may have eccentric taste in ], or have eccentric ] or collections.
* ], 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===
Many of history's most brilliant minds have displayed many unusual behaviors and habits, and eccentricity is sometimes thought to be a sign of ]. However, many eccentrics are ], rather than geniuses.
* ], 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

Topics referred to by the same term Disambiguation iconThis disambiguation page lists articles associated with the title Eccentricity.
If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: