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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
    (http://ssd.jpl.nasa.gov/horizons.cgi)

  • 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
    (http://ssd.jpl.nasa.gov/sbdb_query.cgi)

  • 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
    (http://ssd.jpl.nasa.gov/sbdb.cgi)

  • 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 (http://ssd.jpl.nasa.gov/?site_map)

Formulae for Approximate Planetary Ephemerides
    (http://ssd.jpl.nasa.gov/?planet_pos)

  • 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
    (http://ssd.jpl.nasa.gov/?faq)

Updated Glossary
    (http://ssd.jpl.nasa.gov/?glossary)

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