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Saturn and Titan seen from the Cassini spacecraft on Nov 9, 2003, compared with an actual Cassini image (credit NASA/JPL/Space Science Institute). The Cassini origin file was created using the CASSINI ephemeris tool and this script, supplied with xplanet in the scripts directory.
xplanet -origin_file origin -origin saturn -target saturn -interpolate_origin_file -radius 21 -north orbit -config config -date 20031109.085400 -light_time -utclabel -label_string "Looking at %t from Cassini" -date_format "%a, %b %e %Y (day %j) at %T %Z" -geometry 578x575
Alternatively, if you have compiled Xplanet with the SPICE library, you can use the spacecraft kernel files supplied by JPL:
xplanet -ephemeris lnx1900.405 -spice_file spice -origin naif-82 -target saturn -radius 21 -north orbit -config config -date 20031109.085400 -light_time -utclabel -label_string "Looking at %t from Cassini" -date_format "%a, %b %e %Y (day %j) at %T %Z" -geometry 578x575
