For Earth, on average L is equal to 1. 384 km, which is much larger than the Moon's semimajor axis of 3. 844 km.

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

Together they form the upper branch of an ellipse of long semimajor axis that approximately orientates from west to east.

With a semimajor axis of 2. 5294 AU, or roughly 2. 5 times the separation of the Earth from the Sun, Toutatis has a 3: 1 orbital resonance with Jupiter and a near-1: 4 resonance with Earth.

For example, there are very few asteroids with semimajor axis near 2. 50 AU, period 3. 95 years, which would make three orbits for each orbit of Jupiter ( hence, called the 3: 1 orbital resonance ).

For circular orbits the semimajor axis is the distance between the center of the bodies, not the distance of the bodies to the center of mass.

* Argument of periapsis defines the orientation of the ellipse ( in which direction it is flattened compared to a circle ) in the orbital plane, as an angle measured from the ascending node to the semimajor axis.

It differs from the sidereal period because the object's semimajor axis typically advances slowly.

Estimates of the maximum radius of its elliptical orbit — the semimajor axis — range from 3. 38 AU to 3. 50 AU and approximations of its orbital eccentricity range from to.

For a typical GTO with a semimajor axis of 24, 582 km, perigee velocity is 9. 88 km / s and apogee velocity is 1. 64 km / s, clearly making the inclination change far less costly at apogee.

a is the semimajor axis of the ellipse.

is close to that of a circular one, and the mean orbital speed can be approximated either from observations of the orbital period and the semimajor axis of its orbit, or from knowledge of the masses of the two bodies and the semimajor axis.

where is the orbital velocity, is the length of the semimajor axis, is the orbital period, and is the standard gravitational parameter.

Radial velocity can be used to estimate the masses of the stars, and some orbital elements, such as eccentricity and semimajor axis.

If a is taken to be the semimajor axis of the orbit of one body around the other, then r < sub > 1 </ sub > will be the semimajor axis of the first body's orbit around the center of mass or barycenter, and r < sub > 2 </ sub >

The defining parameters of the WGS 66 Ellipsoid were the flattening ( 1 / 298. 25 ), determined from satellite data and the semimajor axis ( 6, 378, 145 meters ), determined from a combination of Doppler satellite and astro-geodetic data.

The value for the semimajor axis ( a ) of the WGS 72 Ellipsoid is 6 378 135 meters.

A chart of the distribution of asteroid semimajor axes, showing the Kirkwood gap s where orbits are destabilized by resonances with Jupiter.

Hyades binaries tend to have small separations, with most binary pairs in shared orbits whose semimajor axes are smaller than 50 astronomical units.

Instead, it has adopted the following naming convention for such objects: befitting their centaur-like transitional orbits between TNOs and comets, " objects on unstable, non-resonant, giant-planet-crossing orbits with semimajor axes greater than Neptune's " are to be named for other hybrid and shape-shifting mythical creatures.

* semimajor axes between 3. 08 AU and 3. 24 AU

* Equator of orbited body for satellites with small semimajor axes

* Local Laplace plane-satellites with intermediate-to-large semimajor axes

More recent calculations by Bobylev in 2010 suggest Gliese 710 has an 86 percent chance of passing through the Oort cloud, considering the Oort cloud to be a spheroid around the Sun with semiminor and semimajor axes of 80, 000 and 100, 000 astronomical units.

Based on an estimated semimajor axis of 12 ″ and a parallax of 0. 168 ″, the two stars are separated by an average distance of 71 AU, where an AU is the average distance between the Sun and the Earth.

The size is represented by the radius at the equator — the semimajor axis of the cross-sectional ellipse — and designated by the letter.

The secondary star B orbits A at only 9. 5 times the semimajor axis of A's planet.

The second planet HD 74156 c is a long-period, massive planet ( at least 8 times the mass of Jupiter ), which orbits the star in an elliptical orbit with a semimajor axis of 3. 90 astronomical units.

Confirmation of the existence of a second planet followed in 2005, when long term observations of the star's radial velocity variations revealed a variation on a period of about eight years, caused by a planet with a mass at least twice that of Jupiter in a very eccentric orbit with a semimajor axis of about 4. 3 AU.

They move along the orbits with a semimajor axis near 4. 0 AU and moderate values of eccentricity ( up to 0. 3 ) and inclination ( up to 20 °).

In 2008, a second planet, designated " Gliese 436 c " was claimed to have been discovered, with an orbital period of 5. 2 days and an orbital semimajor axis of 0. 045 AU .< ref > The planet was thought to have a mass of roughly 5 Earth masses and have a radius about 1. 5 times larger than the Earth's.

The orbit of B relative to the A-C pair was determined in 1999 and not updated since ( as of June 2007 ): plausible orbits range in period from 18, 200 to 1. 3 million years, with a semimajor axis ranging from 877 to 15, 180 AU.

The planet's orbit takes 798. 5 days to complete, with a semimajor axis of 1. 68 AU.

As noted above, this orbit has only half as long a semimajor axis ( R / 2 ) as a circular orbit with radius R ( where the semimajor axis is R ), and thus the period for the shorter high-eccentricity " orbit " is that for one with an axis of R / 2 and a total orbital pathlength of only twice the infall distance.

Thus, by Kepler's third law, with half the semimajor axis radius it thus takes only ( 1 / 2 )< sup > 3 / 2 </ sup >

Sets of satellite derived station coordinates and gravimetric deflection of the vertical and geoid height data were used to determine local-to-geocentric datum shifts, datum rotation parameters, a datum scale parameter and a value for the semimajor axis of the WGS Ellipsoid.

The eccentricity can be defined as the ratio of the linear eccentricity to the semimajor axis a: that is,.

Their orbit has a semimajor axis of 35 AU ( which is also the approximate average distance between B and C ) and is rather elliptical ( eccentricity 0. 410 ).

Angular momenta of a classical object .< p > Left: intrinsic " spin " angular momentum S is really orbital angular momentum of the object at every point ,</ p >< p > right: extrinsic orbital angular momentum L about an axis ,</ p >< p > top: the moment of inertia tensor | moment of inertia tensor I and angular velocity ω ( L is not always parallel to ω )</ p >< p > bottom: momentum p and it's radial position r from the axis .</ p > The total angular momentum ( spin + orbital ) is J.

Cup-type anemometer with vertical axis, a sensor on a remote meteorological station deployed on Skagit Bay, Washington ( state ) | Washington July – August, 2009.

The interface of two Miscibility | immiscible liquids rotating around a vertical axis is an upward-opening circular paraboloid.

The interface of two Miscibility | immiscible liquids rotating around a vertical axis is an upward-opening circular paraboloid.

The horizontal axis represents the semi-major axis | semi-major axes.

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.

Here, it is shown projected outward ( gray ) to the celestial sphere, along with the Earth's equator and Earth's rotation | polar axis ( green ).

This is the essentially the reason for the restriction to exponential type of less than 2π: the function sin ( 2πnz ) grows faster than e < sup > 2π | z |</ sup > along the imaginary axis!

< ol >< li > polarizer | Polarizing filter film with a vertical axis to polarize light as it enters .</ li > < li > Glass substrate with Indium tin oxide | ITO electrode s. The shapes of these electrodes will determine the shapes that will appear when the LCD is turned ON.

L is an arbitrary Chord ( geometry ) | chord of the parabola perpendicular to its axis of symmetry, which passes through V and F. ( The ends of the chord are not shown here.

File: Electronic_band_diagram. svg | Integrating over the k axis gives the bands of a semiconductor showing a full valence band and an empty conduction band.

Relations between rotation axis, Orbital plane ( astronomy ) | plane of orbit and axial tilt ( for Earth ).

The north and south celestial poles and their relation to Rotation | axis of rotation, Orbital plane ( astronomy ) | plane of orbit and axial tilt.

Image: Arc De Triomphe from La Defense. jpg | The Arc de Triomphe from La Défense 5 km ( 3 mi ) away, showing how precisely the axis is aligned.

The horizontal axis is voltage drop, the vertical axis is electric current | current.

The Axe historique | historical axis, looking west from Place de la Concorde ( the Obelisk of Luxor is in the foreground ). The Champs-Elysées seen from the Arc de Triomphe

As the distance to the axis of revolution decreases, the ring torus becomes a horn torus, then a spindle torus, and finally Degeneracy ( mathematics ) | degenerates into a sphere.

The rotation | axis of a planet remains oriented in the same direction with reference to the background stars regardless of where it is in its orbit.