{
  "source": "https://raw.githubusercontent.com/astronexus/HYG-Database/c7f7f883fe678cc7680169a50ccd7dcc49b060ce/hyg/CURRENT/hygdata_v41.csv",
  "revision": "c7f7f883fe678cc7680169a50ccd7dcc49b060ce",
  "sha256": "d9f69fd86bbf90a4e4d52b4c5c53eacfa6dfc0bfdef85bfd94f095e0bebe4ebd",
  "license": "CC BY-SA 4.0",
  "author": "David Nash / Astronexus and HYG contributors",
  "epoch": "J2000.0",
  "count": 105153,
  "candidates": 18363,
  "binaryLayout": "Little-endian float32: x,z,-y (parsecs), apparent magnitude, B-V. 20 bytes/star.",
  "modifications": "Exclude Sun, invalid distance, distance >=700pc; reconstruct Cartesian positions from ra,dec,dist for consistent distance norms; transform axes; candidate subset; collapse explicit companions; convert parsecs to light-years (3.26156). Missing B-V renders with 0.65.",
  "limitations": "No per-star distance uncertainty in this derivative. No claim of date-exact matches."
}