Amalthea is in a close orbit around Jupiter and is within the outer edge of the Amalthea Gossamer Ring, which is formed from dust ejected from its surface.

Amalthea's orbit lies near the outer edge of the Amalthea Gossamer Ring, which is composed of the dust ejected from the satellite.

However, on November 5, 2002, the Galileo orbiter made a targeted flyby that came within 160 km of Amalthea and the deflection of its orbit was used to compute the moon's mass ( its volume had been calculated previously — to within 10 % or so — from a careful analysis of all extant images ).

During its flyby of Amalthea, the Galileo orbiter's star scanner detected nine flashes which appear to be small moonlets near the orbit of Amalthea.

However, this time Amalthea was on the other side of the planet, so it is probable that the particles form a ring around the planet near Amalthea's orbit.

To raise the dancer out of his personal, pedestrian self, Mr. Nikolais has experimented with relating him to a larger, environmental orbit.

`` The white colonnaded, cedar-roofed Southern mansion is directly traceable via the grey and buff stone of grey-skied England to the golden stucco of one particular part of the blue South, the Palladian orbit stretching out from Vicenza: the old mind of Andrea Palladio still smiles from behind many an old rocking chair on a Southern porch, the deep friezes of his architectonic music rise firm above the shallower freeze in the kitchen, his feeling for light and shade brings a glitter from a tall mint julep, his sense of columns framing the warm velvet night has brought together a million couple of mating lips ''.

Thus the term asteroid has come increasingly to refer specifically to the small bodies of the inner Solar System out to the orbit of Jupiter, which are usually rocky or metallic.

Astrometry has also been used to support claims of extrasolar planet detection by measuring the displacement the proposed planets cause in their parent star's apparent position on the sky, due to their mutual orbit around the center of mass of the system.

This galaxy has also been cited in studies of dark matter, because the stars in the outer ring orbit too quickly for their collective mass.

Thus a circular geosynchronous orbit has a radius of 42164 km ; 42164 / 6378. 1

The rotation itself is represented by the angular velocity vector Ω, which is normal to the plane of the orbit ( using the right-hand rule ) and has magnitude given by:

50000 Quaoar, for example, has a near-circular orbit close to the ecliptic.

Many dwarf galaxies may orbit a single larger galaxy ; the Milky Way has at least a dozen such satellites, with an estimated 300 – 500 yet to be discovered.

A NASA multi-center Technology Applications Assessment Team led from the Johnson Spaceflight Center, has as of January 2011 described " Nautilus-X ", a concept study for a multi-mission space exploration vehicle useful for missions beyond low earth orbit ( LEO ), of up to 24 months duration for a crew of up to six.

The other focal point, marked with a lighter dot, has no physical significance for the orbit.

In Niven's obscure story The Color of Sunfire it has entire continents covered with Slaver sunflowers ( bred as defense for Thrint manors, they focus sunlight using silver leaves as parabolic reflectors ), giving it an appearance from orbit of having " silver eyes ".

In 1984, Physicist Richard A. Muller postulated that the Sun has a heretofore undetected companion, either a brown dwarf or a red dwarf, in an elliptical orbit within the Oort cloud.

Orcus has an orbit similar in inclination and eccentricity to Pluto's.

Mercury, the smallest planet in the Solar System, has the most eccentric orbit.

An open orbit has the shape of a hyperbola ( when the velocity is greater than the escape velocity ), or a parabola ( when the velocity is exactly the escape velocity ).

A closed orbit has the shape of an ellipse.

An orbit around any star, not just the Sun, has a periastron and an apastron.

The analysis so far has been two dimensional ; it turns out that an unperturbed orbit is two-dimensional in a plane fixed in space, and thus the extension to three dimensions requires simply rotating the two-dimensional plane into the required angle relative to the poles of the planetary body involved.

This definition has been both praised and criticized, and remains disputed by some scientists since it excludes many objects of planetary mass based on where or what they orbit.

*, which has the most elliptical orbit ( its eccentricity is 0. 33 ), with the perihelion halfway between Uranus and Neptune

< span style =" font-size: 90 %;"> ( Red Faction )</ span ></ ref > After sending a distress call to the Earth Defense Force Parker destroys the missile defense system, so that he can stow away on a shuttle to an Ultor space station in Martian orbit to deactivate a laser defense system without getting shot down .< ref > Hendrix: Ultor has a system of laser satellites orbiting Mars.

In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavour.

The United States Space Surveillance Network ( SSN ), a division of The United States Strategic Command, has been tracking objects in Earth's orbit since 1957 when the Soviets opened the space age with the launch of Sputnik I.

However, despite showing some promise, none of them has come close to achieving orbit yet due to problems with finding the most efficient propulsion system.

The eccentricity ( orbit ) | eccentricities of the orbits are represented by segments ( extending from perihelion to aphelion ) with the inclination s represented on the vertical axis.

Histogram s are shown for orbit inclinations, eccentricity, and semi-major axes distribution.

To draw the orbit with a pair of compasses the centre of the circle should be offset from the focus by an amount equal to the eccentricity multiplied by the radius.

The apparent change in size is due to the eccentricity of the lunar orbit.

* involve one or any combination of the orbit parameters ( e. g. eccentricity versus semimajor axis, or eccentricity versus orbital inclination ).

A Kozai resonance occurs when the inclination and eccentricity of a perturbed orbit oscillate synchronously ( increasing eccentricity while decreasing inclination and vice versa ).

A small radial impulse given to a body in orbit changes the eccentricity, but not the orbital period ( to first order ).

* Orbital simulations by Varadi, Ghil and Runnegar ( 2003 ) provide another, slightly different series for Earth orbit eccentricity, and also a series for orbital inclination.

Precession of the equinoxes, perihelion precession, and changes in the tilt of the Earth's axis to its orbit, and the eccentricity of its orbit over tens of thousands of years are all important parts of the astronomical theory of ice ages.

Pierre-Simon Laplace produced in 1786 a theoretical analysis giving a basis on which the Moon's mean motion should accelerate in response to perturbational changes in the eccentricity of the orbit of the Earth around the Sun.

The technique works since the laser power ablates one side of the object, giving an impulse that changes the eccentricity of the object's orbit.

In the general case of a geosynchronous orbit with a non-zero inclination or eccentricity, the ground track is a more or less distorted figure-eight, returning to the same places once per sidereal day.

Its orbit has very small eccentricity (~ 0. 0002 ) and inclination (~ 0. 06 °) relative to the equator of Jupiter.

Its orbit around the Sun is highly elliptical, with an orbital eccentricity of 0. 967 ( with 0 being a perfect circle and 1 being a parabolic trajectory ).

There is a direct correlation between the period of revolution of a binary star and the eccentricity of its orbit, with systems of short period having smaller eccentricity.

Librations are primarily caused by the Moon's varying orbital speed due to the eccentricity of its orbit: this allows earthlings to see up to about 6 ° more along its perimeter.

Instead, it turned out that Mercury has a 3: 2 spin – orbit resonance, rotating three times for every two revolutions around the Sun ; the eccentricity of Mercury's orbit makes this resonance stable.