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  2. Earth's orbit - Wikipedia

    en.wikipedia.org/wiki/Earth's_orbit

    One complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi). [2] Ignoring the influence of other Solar System bodies, Earth's orbit, also called Earth's revolution, is an ellipse with the Earth–Sun barycenter as one focus with a current eccentricity of 0.0167. Since this value ...

  3. Geosynchronous orbit - Wikipedia

    en.wikipedia.org/wiki/Geosynchronous_orbit

    A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital period means that, for an observer on Earth's surface, an object in geosynchronous orbit returns to ...

  4. File:Orbits around earth scale diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Orbits_around_earth...

    Distance above earth (km) Distance from center of earth (km) Earth Erde Terre భూమి: Blue/brown image: 0: 6370 Low Earth Orbit (LEO) Low Earth Orbit Orbite terrestre basse భూ నిమ్న కక్ష్య: Cyan area: 160 to 2,000: 6,530 to 8,370 Medium Earth Orbit (MEO) Medium Earth Orbit Orbite moyenne de la terre

  5. List of orbits - Wikipedia

    en.wikipedia.org/wiki/List_of_orbits

    Geosynchronous orbit (GSO): An orbit around the Earth with a period equal to one sidereal day, which is Earth's average rotational period of 23 hours, 56 minutes, 4.091 seconds. For a nearly circular orbit, this implies an altitude of approximately 35,786 kilometers (22,236 mi). The orbit's inclination and eccentricity may not necessarily be zero.

  6. Medium Earth orbit - Wikipedia

    en.wikipedia.org/wiki/Medium_Earth_orbit

    Clickable image, highlighting medium altitude orbits around Earth, [a] from Low Earth to the lowest High Earth orbit (geostationary orbit and its graveyard orbit, at one ninth of the Moon's orbital distance), [b] with the Van Allen radiation belts and the Earth to scale To-scale diagram of low, medium, and high Earth orbits Space of Medium Earth orbits (MEO) as pink area, with Earth and the ...

  7. Satellite ground track - Wikipedia

    en.wikipedia.org/wiki/Satellite_ground_track

    This ground track is shifted east or west depending on the longitude of the ascending node, which can vary over time due to perturbations of the orbit. If the period of the satellite is slightly longer than an integer fraction of a day, the ground track will shift west over time; if it is slightly shorter, the ground track will shift east. [2] [4]

  8. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    For example, the synodic period of the Moon's orbit as seen from Earth, relative to the Sun, is 29.5 mean solar days, since the Moon's phase and position relative to the Sun and Earth repeats after this period. This is longer than the sidereal period of its orbit around Earth, which is 27.3 mean solar days, owing to the motion of Earth around ...

  9. Deferent and epicycle - Wikipedia

    en.wikipedia.org/wiki/Deferent_and_epicycle

    Finding the coefficients a j to represent a time-dependent path in the complex plane, z = f(t), is the goal of reproducing an orbit with deferent and epicycles, and this is a way of "saving the phenomena" (σώζειν τα φαινόμενα). [28] This parallel was noted by Giovanni Schiaparelli.

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