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