.SE1 File Extension

A .SE1 file is a Swiss Ephemeris Data File, created by Astrodienst.

Open with Astrodienst Swiss Ephemeris. Available for Windows.

What is a .SE1 file?

The .SE1 file extension is associated with a Swiss Ephemeris Data File. This type of file is crucial for the Swiss Ephemeris software, which is known for its high precision in calculating astronomical positions and is commonly used in astrology to create detailed horoscopes. The data contained in .SE1 files includes information about the positions of planets, moons, or smaller celestial bodies known as planetoids. This data helps enhance the accuracy of predictions beyond what the software's default ephemeris can provide.

Swiss Ephemeris Data Files are categorized into several types based on the celestial bodies they describe. The first type covers planetary data, which includes information about all the planets in our solar system, such as Mars, Venus, and Neptune, as well as the Sun. The second type focuses on the Moon and provides detailed data specifically about Earth's moon. The third type includes data on asteroids or planetoids, such as Chiron, Vesta, and Pholus. Each of these data files spans time intervals of 600 years, offering extensive historical and future astronomical data.

An ephemeris, in general, serves as a calendar or diary in the fields of astronomy and celestial navigation, listing the positions of stars, planets, and other celestial bodies at specific times. The Swiss Ephemeris is particularly noted for its reliance on the DExxx ephemerides from NASA's Jet Propulsion Laboratory (JPL), ensuring a high level of accuracy. It is also available as a library that developers can license and integrate into their own astrological software applications.

To open a .SE1 file, you would typically use the Astrodienst Swiss Ephemeris software, which is specifically designed to read and process this type of data file. This software is essential for astrologers and astronomers who require precise planetary and lunar data for their calculations and predictions.


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