## 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 orĀ **Keplerian Elements**). These are the parameters that define an orbit at a particular time.

**Inclination (i)**angle between the plane of the Ecliptic and the 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