The File Extensions Database

.SE1 File Extension

  • Developer by: Astrodienst
  • Category: Data Files

What is an .SE1 file?

.SE1 is Swiss Ephemeris Data File

Data file created and used by Swiss Ephemeris, a high precision ephemeris used to compute complete horoscopes; contains data about planets, moons, or planetoids; used to increase the precision of the built-in default ephemeris.

There are several types of Swiss Ephemeris data files. One type is Planetary, which is used for all planets, such as Mars, Venus, and Neptune. It also includes the sun. The second type is Moon, which pertain to the earth's moon. The third type is Asteroid files, which is used for planetoids such as Chiron, Vesta, and Pholus. Each data file type has time intervals of 600 years.

An Ephemeris is a calendar or diary used in astronomy and celestial navigation to give the positions of astronomical objects in the sky at a given time. The Swiss Ephemeris is largely based on the DExxx ephemerides from NASA's JPL. It is a library that can be licensed by developers to incorporate into their astrological software.

Programs that open Swiss Ephemeris Data File
Astrodienst Swiss Ephemeris

How to solve problems with SE1 files

  • Associate the SE1 file extension with the correct application. On :
    Windows: Right click on any SE1 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.SE1 files". Mac: Right click (or Ctrl-click) the SE1 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .SE1 is Swiss Ephemeris Data File. Because only the current version supports the latest SE1 file format. Search, therefore, e.g. on the Astrodienst manufacturer website after an available .SE1 is Swiss Ephemeris Data File update.
  • To make sure that your SE1 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.