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| | C source code for JPL DE ephemerides |
 | | Those looking for more information as to the inner workings of DE ephemerides, as well as how to convert their raw output into useful positions, may be interested in the book Fundamental Ephemeris Computations, by Paul J. Heafner, published by Willmann-Bell. |
 | | The full ephemerides tend to be large (DE-406 runs to about 200 MBytes), but as you'll see, "subset" ephemerides are available covering shorter spans. |
 | | That is, one might use the code to open up a DE ephemeris (of any of the three flavors), and ask that a smaller ephemeris covering a particular time span be written out, in any of the three flavors. |
| www.projectpluto.com /jpl_eph.htm (2372 words) |
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