The primary use of astronomical portions specified in using this method is always to determine other relevant parameters of movement, in an effort to forecast long term positions and velocities.In The actual list of coordinates exampled over, much of the elements has been omitted as unfamiliar or undetermined; such as, the factor n allows an approx

Epoch (geology), a span of time on the geologic time scale shorter than the usual time period and longer than an ageIn chronology and periodization, an epoch or reference epoch is An immediate in time chosen since the origin of a particular calendar period. The "epoch" serves as being a reference issue from which era is measured.The position at oth