astroquery's Horizons.ephemerides has a closest_apparition parameter that selects the orbit closest to the epoch(s) being requested. The default is to select the most recent orbit when closest_apparition is True. According to JPL Horizons's documentation other orbits can be selected:

     CAP;         (return last apparition before current da

With the addition of new config options in 1.3, the existing documentation for Custom Asteroids' config format has become too hard to navigate and read. It should be rewritten to be more user-friendly, including the following changes:

• content split across multiple pages instead of one very long page
• common data like distributions or expression syntax should be explicitly linked from descr