perturbations of orbit

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• Orbit — This article is about orbits in celestial mechanics, due to gravity. For other uses, see Orbit (disambiguation). A satellite orbiting the Earth has a tangential velocity and an inward acceleration …   Wikipedia

• Orbit of the Moon — Not to be confused with Lunar orbit in the sense of a selenocentric orbit, that is, an orbit around the Moon The Moon completes its orbit around the Earth in approximately 27.3 days (a sidereal month). The Earth and Moon orbit about their… …   Wikipedia

• PERTURBATIONS —    name given to irregularities or slight deviations in the movement of a heavenly body, due chiefly to the neighbourhood of another point in its orbit …   The Nuttall Encyclopaedia

• Perturbations —    Changes in an objects orbit caused by the gravitational effects of other bodies …   The writer's dictionary of science fiction, fantasy, horror and mythology

• Osculating orbit — In astronomy, and in particular in astrodynamics, the osculating orbit of an object in space (at a given moment of time) is the gravitational Kepler orbit (i.e. ellipse or other conic) that it would have about its central body (corresponding to… …   Wikipedia

• Molniya orbit — For other uses, see Molniya (disambiguation). Figure 1: The Molniya orbit. Usually the period from perigee + 2 hours to perigee + 10 hours is used to transmit to the northern hemisphere Molniya orbit is a type of highly elliptical orbit with an… …   Wikipedia

• Geosynchronous orbit — A geosynchronous orbit is an orbit around the Earth with an orbital period matching the Earth s sidereal rotation period [V. Chobotov, ed., (1996) Orbital Mechanics, 2nd edition , AIAA Education Series, p. 304.] . This synchronization means that… …   Wikipedia

• Graveyard orbit — A graveyard orbit, also called a supersynchronous orbit, junk orbit or disposal orbit, is an orbit significantly above synchronous orbit, where spacecraft are intentionally placed at the end of their operational life. It is a measure performed in …   Wikipedia

• Minimum orbit intersection distance — The orbit of (4953) 1990 MU, which, with a MOID of 0.0276 AU, is classified as a potentially hazardous object Minimum orbit intersection distance (MOID) is a measure used in astronomy to assess collision risk between astronomical objects.[1] It… …   Wikipedia

• celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …   Universalium

• Two-Line Elements — Éléments orbitaux : * a le demi grand axe de l orbite * e l excentricité de l orbite * i l inclinaison de l orbite * Ω la longitude du …   Wikipédia en Français