{
  "schemaVersion": 1,
  "catalog": "HYG Database v4.4 — magnitude-limited subset",
  "publisher": "Astronexus / David Nash",
  "sourceRepository": "https://codeberg.org/astronexus/hyg",
  "immutableSource": "https://codeberg.org/astronexus/hyg/media/commit/53e3df311869e813ace5f1ad2ec4ce909f13256c/data/hyg/CURRENT/hyg_v44.csv.gz",
  "sourceSha256": "00b349893b9a53106dd488d8371e8d2fa586043e500bb3cdb8bff3931682197d",
  "sourceLicense": "CC BY-SA 4.0",
  "sourceLicenseUrl": "https://codeberg.org/astronexus/hyg/src/branch/main/LICENSE",
  "derivedDataLicense": "CC BY-SA 4.0",
  "coordinateFrame": "J2000 equatorial",
  "fields": [
    "rightAscensionHours",
    "declinationDeg",
    "magnitude",
    "colorIndex"
  ],
  "transformation": [
    "Excluded HYG id=0 (Sol), which the simulator models separately.",
    "Selected records with apparent visual magnitude <= 7.5.",
    "Retained RA, declination, magnitude and B-V color index as float32.",
    "Sorted by ascending magnitude, then stable HYG id."
  ],
  "rowCount": 25790,
  "missingColorCount": 83,
  "magnitudeLimit": 7.5,
  "magnitudeRange": [
    -1.44,
    7.5
  ],
  "catalogSha256": "8dfc291cc22f0b39a7e7e31e4bd742ea219fe871f3965ec5232f8fa87dbce7e6",
  "byteLength": 412656
}