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  2. Template:Comparison satellite navigation orbits - Wikipedia

    en.wikipedia.org/wiki/Template:Comparison...

    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

  3. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy , it usually applies to planets or asteroids orbiting the Sun , moons orbiting planets, exoplanets orbiting other stars , or binary stars .

  4. Kepler's laws of planetary motion - Wikipedia

    en.wikipedia.org/wiki/Kepler's_laws_of_planetary...

    The ratio of the square of an object's orbital period with the cube of the semi-major axis of its orbit is the same for all objects orbiting the same primary. This captures the relationship between the distance of planets from the Sun, and their orbital periods.

  5. Sidereal year - Wikipedia

    en.wikipedia.org/wiki/Sidereal_year

    At present, the rate of axial precession corresponds to a period of 25,772 years, [3] so sidereal year is longer than tropical year by 1,224.5 seconds (20 min 24.5 s, ~365.24219*86400/25772). Before the discovery of the precession of the equinoxes by Hipparchus in the Hellenistic period , the difference between sidereal and tropical year was ...

  6. Binary mass function - Wikipedia

    en.wikipedia.org/wiki/Binary_mass_function

    Radial velocity curve with peak radial velocity K=1 m/s and orbital period 2 years. The peak radial velocity is the semi-amplitude of the radial velocity curve, as shown in the figure. The orbital period is found from the periodicity in the radial velocity curve. These are the two observable quantities needed to calculate the binary mass function.

  7. Synchronous orbit - Wikipedia

    en.wikipedia.org/wiki/Synchronous_orbit

    T = rotational period of the body = Radius of orbit. By this formula one can find the stationary orbit of an object in relation to a given body. Orbital speed (how fast a satellite is moving through space) is calculated by multiplying the angular speed of the satellite by the orbital radius. [3]

  8. Mean longitude - Wikipedia

    en.wikipedia.org/wiki/Mean_longitude

    Diagram of an orbit. The plane of the orbit is in yellow, the reference plane is in gray, and the reference direction (vernal point) is the arrow in red.Also labeled are the mean anomaly (M) in pink, the true anomaly in red, the argument of periapsis (ω) and periapsis in purple, the longitude of ascending node (Ω) in green, and the inclination (i) in dark green.

  9. Kepler orbit - Wikipedia

    en.wikipedia.org/wiki/Kepler_orbit

    The distance to the focal point is a function of the polar angle relative to the horizontal line as given by the equation In celestial mechanics , a Kepler orbit (or Keplerian orbit , named after the German astronomer Johannes Kepler ) is the motion of one body relative to another, as an ellipse , parabola , or hyperbola , which forms a two ...

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