MPEC Orbit Computers
The following list, in initial-order, indicates the full names for the orbit computers that appear in abbreviated form on the Daily Orbit Update MPECs.Initial Computer A David Asher D Andreas Doppler E Edward Bowell I Kiyotaka Ichikawa K Takao Kobayashi M Brian G. Marsden N Syuichi Nakano S Timothy B. Spahr (= X, before 2000 July 27) U Takeshi Urata W Gareth V. Williams X Minor Planet Center staff Z Joachim Schubart e Maria Eugenia Sansaturio f Giuseppe Forti g Edwin Goffin i Nina K. Sumzina n Arno Gnadig r Mike Kretlow s Piero Sicoli (= S, before 2000 July 27)Additional names will be added to this list as necessary.
Other codes
In the column immediately preceding the orbit computer code, there may be a letter indicating that the orbit is e-assumed, that there is a double designation, or both.
Code Meaning
D Double designation (new double designations will
be listed on the same MPEC)
E Eccentricity was assumed
F = D + E
