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This tool provides a web-based
JPL's HORIZONS system
which can be used to generate ephemerides for solar-system bodies. Full access to
features is available via the primary
HORIZONS system news
shows recent changes and improvements. A
is available to assist new users.
Ephemeris Type [
Target Body [
Observer Location [
Time Span [
Table Settings [
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switch to time-span form
specify discrete output times
Available time span for currently selected target body:
Times may be specified as calendar dates and optionally times (e.g. "
)", or Julian dates (e.g. "
") where items in curly braces
are optional. For years earlier than 1000, be sure to append 'AD' (or 'BC' as appropriate). All times are UT.
Times will be sorted in ascending chronological order on output.
Allowable time-spans for all bodies are available on a
2020-May-28 09:00 UT
Ryan S. Park
Alan B. Chamberlin