Eccentricity
Related Category: Astronomy: General
in astronomy: see orbit.
More on Eccentricity ...
Orbital Eccentricity
PlanetOrbital EccentricityPerihelion
(Point in Orbit Closest to Sun)
measured in AU'sAphelion
(Point in Orbit Farthest from Sun)
measured in AU's
Mercury ...
Eccentricity = e = c/a
Orbital Eccentricity
PlanetOrbital EccentricityPerihelion
(Point in Orbit Closest to Sun)
measured in AU'sAphelion
(Point in Orbit Farthest from Sun)
measured in AU's ...
Definition: eccentricity: The eccentricity of an ellipse (planetary orbit) is the ratio of the distance between the foci and the major axis.In other words, the more flattened the circle (ellipse), the more 'eccentric' the orbit.
Orbital Eccentricity
The orbital eccentricity (or eccentricity) is a measure of how much an elliptical orbit is 'squashed'.
Eccentricity
(a) In astronomy, the extent to which an elliptical orbit departs from a circular one. It is usually expressed as a decimal fraction, regarding a circle as having an eccentricity of 0.
Eccentricity
An orbital parameter describing the eccentricity of the orbit ellipse. Eccentricity e is the ratio of half the distance between the foci c to the semi-major axis a: e=c/a.
ECCENTRICITY - Ratio of the distance between the foci and the major axis of an ellipse (planetary orbit). Eccentricity is:
where ra = apoapsis distance and rp = periapsis distance.
Eccentric Orbit
Pluto's highly eccentric orbit makes it the eighth-most distant planet from the Sun for part of each orbit; this most recently occurred from February 7, 1979 through February 11, 1999.
eccentricity (of the Earth's orbit): [ec, EC] a measure of the relative sizes of the major and minor axes of the Earth's elliptical orbit. ec = 0.01671. in the year 2000 and is slowly decreasing. ec = 0 would imply a circular orbit.
eccentricity A measure of the flatness of an ellipse, equal to the distance between the two foci divided by the length of the major axis.
Eccentricity A measure of how 'long or thin' an ellipse is. If the eccentricity equals zero, you have a circle.
Eclipse When one object passes into the shadow of another.
eccentricity (e):
Measure of the ellipticity of the orbit. A circular orbit has e=0 while a segment has e=1.
ecliptic:
The curve defined by the apparent motion of the Sun in the sky.
eccentricity
A value that defines the shape of an ellipse or planetary orbit. The eccentricity of an ellipse (planetary orbit) is the ratio of the distance between the foci and the major axis.
Eccentricity: The measure of the degree of elongation of an ellipse. For example, a circle has an eccentricy of 0, and a parabola (an open figure) an eccentricity of 1. The deviation of an orbit from a perfect circle.
Eccentricity -- The distance between the foci of an ellipse divided by the major axis.
Ecliptic -- The plane in which Earth orbits the sun and in which solar and lunar eclipses occur.
EDL -- (Atmospheric) Entry, Descent, and Landing.
eccentricity
A value between zero and one which represents the shape of an ellipse or an orbit. A low eccentricity is near zero and is a perfect circle, while a high eccentricity is near one and very oval.
...
Eccentricity. The measure of how non-circular an object's orbit is. 0 = a perfect circle; any figure between 0 and 1 = an ellipse; 1 = a parabola; any figure greater than 1 = a hyperbola.
eccentric: In astronomy, an off-center circular path.
eccentricity (e): A measure of the flattening of an ellipse. An ellipse of e = 0 is circular. The closer to 1 e becomes, the more flattened the ellipse.
Eccentricity - A measure of the extent to which an orbit departs from circularity. Eccentricity ranges from 0.0 for a circle to 1.0 for a parabola ...
Eccentricity of Orbit
The habitable zone around a star was first developed for roughly circular planetary orbits, where the eccentricity of the orbit is close to zero (e~ 0).
Eccentricity -- Number between 0 and 1, gauging the elongation of elliptic orbit. The eccentricity e of the orbital ellipse is one of the "orbital elements" characterizing it.
Eccentric anomaly See anomaly.
eccentricity measures how far from a circular shape an ellipse is. Numerically, the eccentricity e = 1 -- (perihelion / semi-major axis). The eccentricity e = 0 for a circle and e = nearly one (1) for very long, skinny ellipses.
Eccentricity- a measure of how closely a planet's orbit approximates to a perfect circle
Eclipse- when one celestial body passes in front of another, dimming or obscuring its light (e.g. solar, lunar, and eclipsing binaries) ...
Eccentricity is a measure of how an orbit deviates from circular. A perfectly circular orbit has an eccentricity of zero; an eccentricit between0 and 1 represents an elliptical orbit.
Eccentricity is a mathematical measure of departure from circularity. A circle has zero eccentricity, and most of the planets have orbits which are nearly circles. Only Pluto and Mercury have eccentricities exceeding 0.1.
eccentric
Non-circular; elliptical (applied to an orbit).
eccentricity
A value that defines the shape of an ellipse or planetary orbit. The eccentricity of an ellipse (planetary orbit) is the ratio of the distance between the foci and the major axis.
Eccentric JupiterEccentricityEccentricity (behavior)
Eccentrik FestivalEcchiEccky
EcclefechanEccles, Greater ManchesterEccles, Kent ...
Eccentricity
The Earth's orbit around the Sun is not a perfect circle, but slightly "stretched" into an ellipse (Figure 4). Its eccentricity is currently about 0.0167, which means that the Earth-Sun distance varies about 1.67% of the mean distance.
Eccentric orbit: An orbit that is elliptical, but very far from circular. Generally comets have this kind of orbit. (Planets do have elliptical orbits as well but they are almost circular).
Eccentric anomaly
Elliptic orbit
[edit] Notes and references
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Eccentricity
The measure of how an object's orbit differs from a perfect circle. Eccentricity defines the shape of an object's orbit.
Eclipse
The total or partial blocking of one celestial body by another.
The eccentricity of Saturn's orbit around the Sun could be responsible for the unusually uneven distribution of lakes over the polar regions of Saturn's largest moon Titan.
The eccentricity of an orbit is a measure of how elliptical (elongated) it is. Most known exoplanets have quite eccentric orbits.
The eccentricity determined in this way is more than a degree in error, owing to the effect of the evection, which was unknown to Hipparchus.
Orbit eccentricity (deviation from circular)
0.017
Mean surface temperature (K) ...
was an Eccentricity , iconoclastic Japanese Zen Buddhism priest and poet. He had a great impact on the infusion of Japanese art and literature with Zen attitudes and ideals.....
, Izumi Shikibu
Izumi Shikibu ...
Phoebe's eccentric, retrograde orbit and unusual albedo indicates that it may be a captured comet or Kuiper Belt object. Data from Cassini's 2004 flyby reinforces this idea with the detection of CO2 trapped within its rocks.
1. A narrow, eccentric ringlet inside a gap in the C Ring.
Maxwell Ringlet
87,491 ...
Mars's orbital eccentricity is 0.093, much larger than that of most other planets"only the innermost and the outermost planets, Mercury and Pluto, have more elongated orbits. Because of this, Mars's perihelion distance from the Sun"1.38 A.U.
Eccentrics
An offcenter circular path.
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118. Eclipse Season
Is the season when the Sun is close enough to a node for an eclipse to occur, An eclipse season is 32 days.
A circle has an eccentricity of 0.0, a parabola 1.0.
3
The inclination of a planetary orbit is measured with respect to the plane of the earth's orbit.
and here are the eccentricities of the planetary orbits
These two graphs display clearly the enormous distances in the outer Solar System, and that Pluto and Mercury have by far the most elliptical orbits.
where
The effect of this eccentricity is that the seasons are very uneven in length.
Orbit:
Inclination
Eccentricity (deviation from circular)
Obliquity (axis tilt) ...
The eccentricity would be the value of the foci-foci distance (green line) divided by the widest part of the ellipse (blue line). For the circle, the green line has a value of 0, so the eccentricity for a circle is 0.
parabolic orbit An orbit shaped like a parabola; the orbit representing the least eccentricity (that of 1) for escape from an attracting body.
Aphelion distance Abbreviation Q, distance of greatest heliocentric separation for a body in an eccentric orbit; Q=a(1+e). Apollo asteroids Asteroids having semimajor axes a1.
eccentricity a parameter that describes the shape of an orbit; the closer the eccentricity is to zero, the more circular the orbit ecliptic the path the Sun takes against the background stars; ...
Not only is the true path quite elliptical, but the orbit is also presented very close to edge-on, making the apparent path even more eccentric. The observations connected to the orbit by dotted lines were not used in the calculations.
The Moon is a spherical, rocky body, possibly with a small metal core, orbiting the Earth in a slightly eccentric orbit at a mean distance of near 400,000 kilometres.
Moreover, the system of movable eccentrics, and that of epicycles and deferents, accounted well for most of the irregularities observed in the motions of the Sun, the Moon, and the planets.
Eccentricity of an orbit is a measure of how far from a circle the elliptical shape appears. For a circular orbit the eccentricity, (e), is zero, for a parabolic orbit e="'1," while' a hyperbolic orbit has e greater than 1.
5 AU and an orbital eccentricity between about 0.4 and 0.65. These objects are held in this region by the 1:3 orbital resonance with Jupiter, which results in a 4:1 resonance with Earth.
It is usually expressed as a decimal fraction, regarding a circle as having an eccentricity of 0. [A84]
(b) A measure of how round or elliptical an orbit is.
Io's vulcanism results from the tremendous land tides caused by 's tremendous gravity flexing it over its eccentric orbit (Peale et al. 1979). The major gas is SO2, but there may also be O2 and Na.
Comets, which are composed largely of volatile ices and whose orbits are highly eccentric, generally having a periapsis within the orbit of the inner planets and an apoapsis out past Pluto.
Within the main belt are groups of asteroids that cluster with respect to certain mean orbital elements (semimajor axis, eccentricity, and inclination). Such groups are called families and are named for the lowest numbered asteroid in the family.
Because of Mars' eccentric (oblong) orbit around the Sun, oppositions can bring Mars anywhere from 35 to 60 million miles of Earth. Oppositons coming in late August are the closest whereas those in late February loom the most distant.
 See also: Orbit, Planet, Solar, Sun, Earth
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