HYG Database 4.1 selected star data
Attribution: David Nash / Astronexus, HYG Database contributors.
Source: https://github.com/astronexus/HYG-Database
Fixed revision: c7f7f883fe678cc7680169a50ccd7dcc49b060ce
Source file: hyg/CURRENT/hygdata_v41.csv
Source license: Creative Commons Attribution-ShareAlike 4.0 International
https://creativecommons.org/licenses/by-sa/4.0/
https://github.com/astronexus/HYG-Database/blob/c7f7f883fe678cc7680169a50ccd7dcc49b060ce/hyg/CURRENT/LICENSE

Modification: selected 28 rows by HIP identity, reordered by Chinese mansion,
retained original numeric fields, and added selection/identity metadata.
The adapted selection is provided under CC BY-SA 4.0. This notice concerns
the data selection, not a relicensing of unrelated application code.

This is a local engineering candidate, not an ancient mansion catalog.
The declared J2000-to-mean-EQJ interpretation is an engineering convention.
The HYG repository license does not certify the commercial rights of every
upstream catalog. Review upstream rights and attribution/share-alike
obligations before a public or commercial release.