@cassolotl@queer.party I just chucked Meeus' work into spreadsheet form really

If you find a copy of his Astronomical Algorithms (by say, following this link http://www.agopax.it/Libri_astronomia/pdf/Astronomical%20Algorithms.pdf ) there's a whole bunch of techniques for calculating lots of stuff like this, don't know which ones would be helpful for paganism but it's worth a look through