Bright-star subset of HYG v4.1 by David Nash / Astronexus.
Source: https://raw.githubusercontent.com/astronexus/HYG-Database/c7f7f883fe678cc7680169a50ccd7dcc49b060ce/hyg/CURRENT/hygdata_v41.csv
License: Creative Commons Attribution-ShareAlike 4.0 International
https://creativecommons.org/licenses/by-sa/4.0/
Changes: omit Sun; select apparent magnitude <= 5.5, convert RA hours to degrees, retain coordinates/names/magnitude.
Positions are catalogue epoch J2000.0; no proper-motion, precession or atmospheric corrections.