New ephemerides of outer planetary satellitesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 мая 2022 г.
Аннотация:Ephemerides of planetary satellites require regular update to take into account new observations of the satellites. Such revision has been all the more necessary in the case of outer planetary satellites, since a number of new moons have been discovered recently. Thus, we present updated version of the ephemerides of the outer planetary satellites. The problem and methodology for estimating the ephemerides' accuracy is discussed. Comparison with the JPL ephemerides proves that the accuracy largely depends on the distribution of the observations. We give examples where, for few satellites, the O-C residuals sharply increase at time intervals lying significantly beyond the time interval of observations used to generate the ephemerides. This fact alone indicates that there is an urgent need for new observations.
Besides the moons' ephemerides, which can be accessible online via the MULTI-SAT server, we provide orbital parameters for the recently discovered faint satellites of Jupiter and Saturn.
The problems discussed in this paper are important for planning space observations of the outer satellites by future space missions like {\bf ESA's JUpiter ICy moons Explorer (JUICE) and NASA's Europa Clipper missions}.