EPHEMERIDES SOFTWARE OF NATURAL SATELLITES
                       N.V.Emelianov
      Universiretskij Prospect, 13, 119899 Moscow, Russia
                  E-mail: emelia@sai.msu.su

Abstract.
    Instead of tables of satellite coordinates a special software
is proposed to be transferred over the observatories to provide
the process of natural satellites observations with ephemeris.
Positions of the planet and satellites are calculated and
displayed on the screen of computer immediately during the
observation. Seeing conditions of a planet for a specified
observatory are at your disposal at all times.  The software is
designed to make up observational plans, to get circumstances of
observations and to test preliminary results. User can reproduce
the mutual phenomena of natural satellites on the screen and get a
model of each light curve. A friendly user interface and graphic
visualizations are applied. The program shows the following
phenomena: apparent disks of a planet and its satellites
configuration, entry of a satellite into the planet shadow,
passage of a satellite through the planet's surface, apparent
intersection of the disks of two satellites, the rings of Saturn,
the shadow fallen on the rings.
    The motion models of all known natural satellites of Mars,
Jupiter, Saturn, Uranus, Neptune and Pluto are embodied in the
software. For the most of the satellites the best existing
theories are realized in the software.
    All necessary parameters of all the mutual phenomena of the
saturnian satellites in 1995-1996 as well as all the mutual
phenomena of the Galilean satellites in 1997-1998 can be
reproduced by the proposed software.