{
  "schema_version": 1,
  "id": "110",
  "type": "star",
  "name": "Sadr",
  "summary": "bright star in Cygnus used as a fixed-sky reference",
  "representation": {
    "machine": "./110.json",
    "human_source": "summary",
    "human": "/stories/special-stars/110.html"
  },
  "constellation_abbreviation": "Cyg",
  "constellation": "Cygnus",
  "position": {
    "ra_deg": 305.557095,
    "dec_deg": 40.256679,
    "ecliptic_longitude_deg": 324.841514,
    "ecliptic_latitude_deg": 57.124408
  },
  "representative_visual_magnitude": 2.23,
  "guiding_asterisms": [
    {
      "id": "1371",
      "geometry_key": "asterism-northern-cross",
      "name": "Northern Cross",
      "relationship": "visual-member",
      "provenance": {
        "source": "Astronomical League",
        "source_url": "https://www.astroleague.org/wp-content/uploads/2025/12/Asterism_List_20251223.pdf",
        "source_role": "verification",
        "supports": "visual-membership"
      }
    }
  ]
}