I learned a lot about astronomical coordinates while figuring this out.

Also star catalogues. Hipparcos is the one I ended up using; Gaia is way too big. I found hip_main.dat here: https://cdsarc.cds.unistra.fr/ftp/I/239/. Here’s a pic of what the data looks like inside:

There’s also a fancy PDF version:

Names can be tied to HIP numbers (i.e. the index in the Hipparcos catalogue) here: https://exopla.net/star-names/modern-iau-star-names/

To convert into 3D space I need to use the right ascension, declination values and parallax values to get x, y, and z in equatorial coordinates. This page from “Vol 1: Introduction and Guide to the Data” was extremely useful. It also contains the matrix needed to convert equatorial coordinates into galactic coordinates. You can find this doc linked on this page: https://www.cosmos.esa.int/web/hipparcos/catalogues

I used the formula on the Absolute magnitude Wikipedia page to compute the absolute magnitude from the data.

A webpage titled What color are the stars? provides a table of colors for each classification.

I also used Space Engine as a sort of “ground truth” when trying to align the stars with the galactic plane. Phew. Hopefully I now have enough to make a 2D map of the campaign world.