In the editor click on Load or View Ephemeris . This will bring up a separate browser. From this browser click on the button labelled Load HORIZONS file as ephemeris . This will bring up a file dialog. Load the ephemeris file, and click on Apply Changes . Later one can view or change the ephemeris by the same process. Also an ephemeris can be saved from the SB to disk. Note that direct editing of the ephemeris field is not allowed.For details on how to generate JPL HORIZONS ephemeris files please check Appendix D .