Ephemiston

Ephemiston is a term derived from the Greek words "ephemeros," meaning fleeting or transient, and "hysteron," meaning later. It refers to a specific type of ephemeris, which is a table or chart that provides the positions of celestial bodies at a given time. Ephemistons are particularly focused on the positions of the Moon, as they are calculated for a specific time period, typically a day or a few days, and are updated regularly to reflect the Moon's changing position.

The term "ephemiston" is often used in the context of astrology and astronomy, where precise knowledge of the Moon's position is crucial for various calculations and predictions. Ephemistons are typically published in almanacs or astronomical tables and are used by astronomers, astrologers, and navigators to determine the exact position of the Moon at any given time.

The creation of an ephemiston involves complex mathematical calculations, taking into account various factors such as the Moon's orbit, the Earth's rotation, and the gravitational influences of other celestial bodies. These calculations are often performed using sophisticated software and algorithms, which can generate highly accurate ephemistons.

In summary, an ephemiston is a specialized ephemeris that provides the positions of the Moon for a specific time period. It is a valuable tool in astronomy, astrology, and navigation, and is created through complex mathematical calculations.