That sounds hopeful. I shall have to read round that a bit. Presumably, the files are each for a declination swathe then?
I had forgotten there was an astometry.net group. Thanks for the reminder.
EDIT: I was wrong. Its not as simple as I had envisaged. These links appear to show the declination versus index file relationship…
https://github.com/dstndstn/astrometry.net/blob/main/util/hp.png
https://github.com/dstndstn/astrometry.net/blob/main/util/hp2.png
Realistically, looking at the layout, a better speed increase could be achieved by running multiple instances of astometry.net simultaneously, so I shall take that route instead. Theres no point having multi-core/threaded machines if you don’t redline them occasionally. 🙂