The Idea!- Kepler’s Algorithms
Yes! the Real time position of any celestial body can be calculated using some parameters called Orbital Elements (or Osculating Elements or Keplerian Elements). These are the parameters that define an orbit at a particular time.
- Inclination (i)angle between the plane of the Ecliptic and th
e plane of the orbit.
- Longitude of the Ascending Node (o)states the position in the orbit where the elliptical path of the planet passes through the plane of the ecliptic, from below the plane to above the plane.
- Longitude of Perihelion (p)states the position in the orbit where the planet is
closest to the Sun.
- Mean distance (a)the value of the semi-major axis of the orbit – measured in Astronomical Units for the major planets.
- Daily motion (n)states how far in degrees the planet moves in one (mean solar) day. This figure can be used to find the mean anomaly of the planet for a given number of days either side of the date of the elements. The figures quoted in the Astronomical Almanac do not tally with the period of the planet as calculated by applying Kepler’s 3rd Law to the semi-major axis.
- Eccentricity (e)eccentricity of the ellipse which describes the orbit.
- Mean Longitude (L)Position of the planet in the orbit on the date of the elements.source:2