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What's New?   March 2006

JPL's Solar System Dynamics web site has been recently updated. The following items summarize key improvements and changes.

Improved Web-Interface to Horizons

  • settings saved between sessions for a given IP address
  • access to Cartesian vector and orbital element tables
  • observer/center no longer restricted to Earth
  • access to all table settings
  • discrete time output (up to 10 values)
  • improved user-interface

Custom Small-Body Database Query Tool

  • generate custom tables of orbital elements and/or physical parameters
  • constrain search based on object type, orbital class, orbital elements, and/or physical parameters
  • sort output based on almost any output field
  • optionally download results in CSV (comma separated values) for import into your favorite software

New Small-Body Database

  • master asteroid and comet database implemented in MySQL
  • significantly improved query speeds
  • full references available for any physical parameter
  • complete taxonomic classification data from both Tholen and SMASSII

Improved Organization and Navigation

  • all pages contain standard header/footer sections with navigation buttons pointing to primary sections of the web site
  • new site map showing all available pages on the site (

Formulae for Approximate Planetary Ephemerides

  • instead of only listing Keplerian elements for the planets, we now include equations appropriate for use with those elements to compute approximate ephemerides

New FAQ (Frequently Asked Questions) Page

Updated Glossary

  • a few more entries have been added to the glossary database
  • improved user-interface to display glossary entries
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