Orbits from the minor planet center.  This is updated automatically
using an execute element within q.rd.

Test data:

zcat /data/gavo/inputs/mpc/data/MPCORB.DAT.gz | head -10000 | gzip > data/MPCORB.DAT.gz

The format is documented on
https://www.minorplanetcenter.net/iau/info/MPOrbitFormat.html