Natural Satellites Service. Special ephemerides
Apparent Encounters
of the Tycho-2 Catalogue stars and the main natural planetary satellites
by S.Vashkovyak
Topics
- We present the precalculated circumstances of the apparent
encounters of the
Galilean satellites of Jupiter and
the main satellites of Saturn (S1-S8)
with the Tycho-2 Catalogue stars.
-
In the beginning of the ephemerides the star conditional catalogue is given.
Instead of three numbers (ntch1 ntch2 ntch3) describing a position of a star
in the Tycho-2 catalogue, one conditional number is given. The conformity is
presented in a tabular form in the beginning of each ephemeride.
-
Apparent angular distances between a star and a satellite given in the
ephemerides tables do not exceed 6 arcminutes for the main satellites of Saturn
(S1-S8) and 15 arcminutes for the Galilean satellites.
-
The highest accuracy of observations is reached at the periods
when a satellite and a star of the same magnitude
approach each other and fall within the same CCD frame.
-
These circumstances allow to associate, with the best possible accuracy,
the dynamical reference frame with that of the star catalogue
using an appropriate theory of satellite motion.
-
The ephemerides of the apparent encounters of the satellites
with the stars allow to choose more appropriate circumstances
of observations using a given CCD frame with a given telescope.
-
Further suggestions.
See:
Explanation to the conditional catalogue.
Explications to the Galilean satellites of Jupiter ephemerides tables.
Explications to the main satellites of Saturn (S1-S8) ephemerides tables.
Ephemerides
Apparent Encounters
of the Tycho-2 Catalogue stars and the Galilean satellites of Jupiter
Apparent Encounters
of the Tycho-2 Catalogue stars and the major satellites of Saturn
Acknowledgements:
This work was supported by the Russian Foundation for Basic
Research, project no. 03-02-17441.
Celestial mechanics department / Sternberg Astronomical Institute /
Moscow University
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