{
  "schema_version": 1,
  "id": "60",
  "type": "star",
  "name": "Spica",
  "summary": "bright star in Virgo used as a fixed-sky reference",
  "representation": {
    "machine": "./60.json",
    "human_source": "summary",
    "human": "/stories/baseline/60.html"
  },
  "constellation_abbreviation": "Vir",
  "constellation": "Virgo",
  "position": {
    "ra_deg": 201.298245,
    "dec_deg": -11.161322,
    "ecliptic_longitude_deg": 203.841357,
    "ecliptic_latitude_deg": -2.054492
  },
  "representative_visual_magnitude": 0.98,
  "guiding_asterisms": [
    {
      "id": "1381",
      "geometry_key": "asterism-spring-triangle",
      "name": "Spring Triangle",
      "relationship": "visual-member",
      "provenance": {
        "source": "Sky & Telescope",
        "source_url": "https://skyandtelescope.org/astronomy-news/observing-news/this-weeks-sky-at-a-glance-may-1-9-3/",
        "source_role": "verification",
        "supports": "visual-membership"
      }
    },
    {
      "id": "1382",
      "geometry_key": "asterism-great-diamond",
      "name": "Great Diamond",
      "relationship": "visual-member",
      "provenance": {
        "source": "NASA",
        "source_url": "https://science.nasa.gov/solar-system/skywatching/night-sky-network/connecting-the-dots-with-asterisms/",
        "source_role": "verification",
        "supports": "visual-membership"
      }
    },
    {
      "id": "1362",
      "geometry_key": "asterism-big-dipper",
      "name": "Big Dipper",
      "relationship": "star-hop-anchor",
      "relationship_route_ids": [
        "big-dipper-arcturus-spica"
      ],
      "provenance": {
        "source": "Astronomical League",
        "source_url": "https://www.astroleague.org/wp-content/uploads/2025/12/Asterism_List_20251223.pdf",
        "source_role": "verification",
        "supports": "asterism-definition"
      }
    }
  ],
  "star_hops": [
    {
      "id": "big-dipper-arcturus-spica",
      "target_type": "star",
      "target": "Spica",
      "steps": [
        "Big Dipper",
        "Arcturus",
        "Spica"
      ],
      "instruction": "Trace the curve of the Big Dipper's handle to Arcturus, then continue the same sweep to Spica.",
      "instruction_authorship": "Star Almanack original wording",
      "provenance": {
        "source": "NASA Jet Propulsion Laboratory",
        "source_url": "https://www.jpl.nasa.gov/videos/whats-up-for-april-2011/",
        "source_role": "verification",
        "supports": "star-hop-method"
      },
      "target_fixed_object_id": 60,
      "step_identities": [
        {
          "type": "asterism",
          "id": 1362
        },
        {
          "type": "fixed-object",
          "id": 63
        },
        {
          "type": "fixed-object",
          "id": 60
        }
      ]
    }
  ]
}