Cassini/Saturn Ephemeris Generator Help

This form enables you to generate a table listing useful information about the viewing geometry for Saturn and/or any of its moons as a function of time. You are free to specify which of a variety of useful quantities to tabulate. The file returned will contain a single header line describing each column, followed by one row of numbers for each time step.

Change History

1.0 (January 28, 1997): Original Saturn Ephemeris Generator on line.
1.1 (February 6, 1997): Added optional columns for sub-solar and sub-Earth inertial longitudes.
2.0 (January 12, 1999): Added sub-solar and sub-Earth latitude/rotating longitude options. Revised user interface. Extended time limits and added new ephemeris option.
2.1 (January 31, 2002): Added a new ephemeris option ("Prometheus 2002"); introduction of the Ephemeris Generator for Cassini.
2.2 (January 9, 2003): Added Phoebe. Added a new column option to provide second accuracy in time tags.
2.3 (August 8, 2007): Added Cassini-discovered moons and the latest ephemeris options.
2.4 (December 1, 2009): Updated the default ephemerides. To reduce confusion, we have removed the choice about what ephemeris to use.
2.5 (January 23, 2013): Anthe and Aegaeon added. Raised the maximum number of output lines to 10,000. Renumbered for consistency across all the Ephemeris Generator tools. Ephemeris updates.
2.6 (January 4, 2016): Ported to new server. Ephemeris updates.
2.7 (October 14, 2020): Ephemeris updates.
2.8 (June 20, 2021): Ephemeris updates.

3.0 (August 2, 2022): Major new features:

Time Limits

The start and stop times (UTC) of the table can be entered in a variety of formats. For example, the following all parse to 0:01:02 UTC on July 4, 1976: If you want the gory details of how times are interpreted, click here.

Enter the time interval to be used for the tabulation as a number in the box, and select the time unit from the choices provided.

General Column Selection

Click on the box to the left of each quantity or set of quantities that you wish to tabulate. The order of the columns in the table will match the order listed on the form. Possible selections are as follows:

Moon Column Selection

You may also include the positions of any set of moons in the table. Any of these quantities can be tabulated for each moon:

Moon Selection

Click on the box to the left of each moon that you wish to include in the table. Note that it is not necessary to include any moon columns at all.

Cassini/Saturn Ephemeris Generator Form | Node Tools | Ring-Moon Systems Node Home

Last updated August 3, 2022