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  Encyclopedia of Keywords > Universe > Planets > Orbits > Mean Anomaly > Mean Motion   Michael Charnine

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    This Review contains major "Mean Motion"- related terms, short phrases and links grouped together in the form of Encyclopedia article.


  1. Mean motion (n) is conventionally defined as the hours in a day (24) divided by the number of hours that it takes a satellite to complete a single orbit.
  2. Mean Motion is usually given in units of revolutions per day.
  3. The mean motion (field 2.8) is measured in revolutions per day.
  4. The mean motion (or orbital frequency) is the reciprocal of the period.
  5. Finally, mean motion is the average position of the satellite in an east-west direction relative to a sub-satellite point on the Earth.


  1. The Keplerian element DECAY is half the rate of change of mean motion.

Long Way

  1. SMA is one-half the length (measured the long way) of the orbit ellipse, and is directly related to mean motion by a simple equation.


  1. We next calculate the mean motion, m of the planet along its orbit.
  2. Earth companion asteroids are bodies in 1:1 mean motion resonance, though are not necessarily confined ahead of or behind our planet the way Trojans are.

Average Value

  1. Unless the orbit is circular, the Mean Motion is only an average value, and does not represent the instantaneous angular rate.


  1. Mean motion resonances in the Solar System The Laplace resonance exhibited by three of the Galilean moons.


  1. The bottommost migrating particles are trapped in the z 1 secular resonance and stay so even after a period of interaction with the mean motion resonances.


  1. Precisely, Drag is one half the first time derivative of Mean Motion.
  2. The Drag orbital element simply tells us the rate at which Mean Motion is changing due to drag or other related effects.

Mean Anomaly

  1. Thus the mean anomaly is the angle from pericenter of a hypothetical body moving with a constant angular speed that is equal to the mean motion.
  2. The average angular velocity, called the mean motion, is the rate of change of the mean anomaly l defined above.


  1. In effect, Mean Distance and Mean Motion are two ways of describing the same thing.


  1. Period is simply the reciprocal of Mean Motion.


  1. Together, these two fields give a second-order picture of how the mean motion is changing with time.
  2. As described above, eccentric time is eccentric anomaly converted to units of time, as is accomplished by dividing eccentric anomaly by mean motion.


  1. Kepler referred to M as the mean motion, and E - e sin E as the mean anomaly.


  1. Integral values for mean motion of the satellites in the array ensures that the ground track repeats on a daily basis.


  1. Mean motion,, is a measure of how fast a satellite progresses around its elliptical orbit.


  1. By plotting the mean motion, eccentricity and inclination of the asteroid orbits, he discovered that some of the objects formed groupings.
  2. The four thrusters provide complete control of the three orbit vectors, namely, inclination, eccentricity and mean motion.


  1. This allows orbits to be formed wherein the values of eccentricity are allowed to become smaller as the mean motion increases.


  1. Mean Motion,, is a measure of how fast a satellite progresses around its orbit.
  2. For example, a satellite that completes an orbit every three hours ("a 3-hour satellite") has a mean motion of 8.
  3. This described orbit is not practical since its period is about 1 hour and 45 minutes which is not an integral value for the mean motion.


  1. The "mean motion" is a value indicating the number of complete revolutions per day that a satellite makes.
  2. You could call this number "average speed", but astronomers call it the "Mean Motion".
  3. The mean motion integer sets the minimum number of satellites in the array and n.sub.c the number of continents that are followed.


  1. The common practice is to average the speed, call it the "Mean Motion", and record it in units of revolutions per day.
  2. In databases of satellite orbital parameters the Mean Motion is typically specified in revolutions per day.

Mean Motion

  1. MEAN MOTION: Number of revolutions (perigee to perigee) completed by satellite in a solar day (1440 minutes).
  2. The total mean anomaly over the period of a day for a satellite with mean motion n is simply n times 360 degrees.
  3. Mean anomaly: in undisturbed elliptic motion, the product of the mean motion of an orbiting body and the interval of time since the body passed pericenter.


  1. Universe > Planets > Orbits > Mean Anomaly
  2. Encyclopedia of Keywords > Society > Revolutions
  3. Sma
  4. Orbit
  5. Eccentricity
  6. Books about "Mean Motion" in

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  Short phrases about "Mean Motion"
  Originally created: March 31, 2007.
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