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IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

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HORIZONS Web-Interface
This tool provides a web-based limited interface to JPL's HORIZONS system which can be used to generate ephemerides for solar-system bodies. Full access to HORIZONS features is available via the primary telnet interface. HORIZONS system news shows recent changes and improvements. A web-interface tutorial is available to assist new users.

Current Settings

Ephemeris Type [change] :  OBSERVER
Target Body [change] :  Mars [499]
Observer Location [change] :  Geocentric [500]
Time Span [change] :  Start=2019-12-05, Stop=2020-01-04, Step=1 d
Table Settings [change] :  defaults
Display/Output [change] :  default (formatted HTML)
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Time Span

switch to discrete-times form

Preset:       
Start Time:
Stop Time:
 


    		     Available time span for currently selected target body:
1600-Jan-01 to 2500-Jan-04 TT.

Times may be specified as calendar dates and optionally times (e.g. "YYYY{BC|AD}-MMM-DD {hh:mm} {UT|TT})", or Julian dates (e.g. "{JD }DDDDDDD.DDDD") where items in curly braces {} are optional. For years earlier than 1000, be sure to append 'AD' (or 'BC' as appropriate). Unless otherwise specified, UT is assumed for OBSERVER tables.

See the HORIZONS documentation for accepted formats and advanced capabilities. Allowable time-spans for all bodies are available on a separate page.
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