{
  "story_id": "638acf7dbcf77f0ab0c4e15cc670ff5c",
  "desk": "drm3",
  "revision": 1,
  "published_at": "2026-09-01T22:00:04.000Z",
  "content_hash": "7ebd9cbf156dcf82b80b6ffff059c7980284c19f45224b39c048aa45126da1f1",
  "hash_basis": "sha256 over `headline\\ndek\\nprose`, plus `\\n` + the canonical citations JSON when any source is placed, plus `\\n#blog` for blogs",
  "basis": {
    "headline": "Saturn encounter triggers comet-like activity in Centaur 450P",
    "dek": "New data suggests a Saturn encounter in 1992 set Centaur 450P on a path to becoming a comet.",
    "prose": "Researchers led by Charles Schambeau, an associate professor at the University of Central Florida, reported that Centaur 450P/LONEOS is showing signs of transforming into a comet. [^1]\n\nResearchers led by Charles Schambeau, a research associate professor at UCF's Florida Space Institute, detected carbon dioxide gas and icy dust surrounding the Centaur object 450P/LONEOS. [^2]\n\nObservations from NASA's James Webb Space Telescope and the Gemini North telescope detected carbon dioxide gas, icy dust, and signs of recent thermal activity surrounding 450P/LONEOS. [^3]\n\nThe altered orbit brought the perihelion of 450P/LONEOS closer to Jupiter, increasing solar heating and causing the gradual formation of a faint coma. [^4]\n\nThe research team found that a close gravitational encounter with Saturn in 1992 significantly altered the orbit of 450P/LONEOS, moving it inward from a more distant trajectory. [^5]\n\nCharles Schambeau stated that Centaurs are transitional objects originating from the outer solar system that evolve toward becoming Jupiter-family comets. [^6]\n\nThe study found strong evidence of carbon dioxide emission but no signs of water vapor or carbon monoxide, suggesting carbon dioxide is likely driving the centaur's activity. [^7]",
    "cited": "[{\"statement\":\"Researchers led by Charles Schambeau, an associate professor at the University of Central Florida, reported that Centaur 450P/LONEOS is showing signs of transforming into a comet.\",\"source\":\"Phys.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T22:00:04.000Z\",\"publisher_count\":1,\"sources\":[\"Phys.org\"]},{\"statement\":\"Researchers led by Charles Schambeau, a research associate professor at UCF's Florida Space Institute, detected carbon dioxide gas and icy dust surrounding the Centaur object 450P/LONEOS.\",\"source\":\"University of Central Florida News | UCF Today\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T13:00:47.000Z\",\"publisher_count\":1,\"sources\":[\"University of Central Florida News | UCF Today\"]},{\"statement\":\"Observations from NASA's James Webb Space Telescope and the Gemini North telescope detected carbon dioxide gas, icy dust, and signs of recent thermal activity surrounding 450P/LONEOS.\",\"source\":\"Phys.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T22:00:04.000Z\",\"publisher_count\":1,\"sources\":[\"Phys.org\"]},{\"statement\":\"The altered orbit brought the perihelion of 450P/LONEOS closer to Jupiter, increasing solar heating and causing the gradual formation of a faint coma.\",\"source\":\"Phys.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T22:00:04.000Z\",\"publisher_count\":1,\"sources\":[\"Phys.org\"]},{\"statement\":\"The research team found that a close gravitational encounter with Saturn in 1992 significantly altered the orbit of 450P/LONEOS, moving it inward from a more distant trajectory.\",\"source\":\"Phys.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T22:00:04.000Z\",\"publisher_count\":1,\"sources\":[\"Phys.org\"]},{\"statement\":\"Charles Schambeau stated that Centaurs are transitional objects originating from the outer solar system that evolve toward becoming Jupiter-family comets.\",\"source\":\"University of Central Florida News | UCF Today\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T13:00:47.000Z\",\"publisher_count\":1,\"sources\":[\"University of Central Florida News | UCF Today\"]},{\"statement\":\"The study found strong evidence of carbon dioxide emission but no signs of water vapor or carbon monoxide, suggesting carbon dioxide is likely driving the centaur's activity.\",\"source\":\"University of Central Florida News | UCF Today\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T13:00:47.000Z\",\"publisher_count\":1,\"sources\":[\"University of Central Florida News | UCF Today\"]}]",
    "kind": "news"
  },
  "receipt_verify": "Ed25519 over the dot-joined string `slice_hash.cursor_from.cursor_to.view.view_version.row_count`; public_key and sig are base64url of the raw 32-byte key / 64-byte signature",
  "receipt": null,
  "receipt_note": "this revision predates receipt-keeping (before v0.37.0); the filed row lives in the record",
  "generation_chain": {
    "wire": {
      "stream": "fountain_news",
      "story_id": "6ad020bf63bd9d76716d28dca148d01d",
      "thread_id": "ed072697b0f904f71546977237135ecb",
      "thread_label": "450P/LONEOS",
      "novelty": "UPDATE",
      "content_hash": "edbf0b19e67f308a9833ddca601e4d85f8c236a5f25d221c6d8771e0f36bdb63",
      "last_published_at": "2026-09-01T22:00:04.000Z",
      "read_receipt": {
        "slice_hash": "94efec08fd0d214ef194bd691e89871ee900cf5633206597da4e36612fb5065e",
        "cursor_from": "eyJ0cyI6IjIwMjYtMDktMDFUMjE6NDY6MDkuMDAwMDAwWiIsImlkIjoiOWRjN2I4OTdiNGY4ODdhNmVlODMzZjlhMzQxMjkzZDIiLCJ2IjoiMSJ9",
        "cursor_to": "eyJ0cyI6IjIwMjYtMDktMDFUMjI6MjE6MDkuMDAwMDAwWiIsImlkIjoiYzRkMTQ4MTI1YmM0NzI3ZGEzZGQyOGE4ZWExMzc1ODEiLCJ2IjoiMSJ9",
        "view": "v_fountain_news",
        "view_version": "1",
        "row_count": 100,
        "window_days": 3,
        "bytes_scanned": 12017721,
        "credits": 8,
        "price_per_100_rows": 8,
        "sig": "lGj04Kf4Vwe0ROhWMslkXds-fVfG31NYP0ibjmPP-3MHbalhVXU9iuozCXsV7Ptf4iuCwdDgLfosH2_1_0zWDA",
        "public_key": "bMUigy8O0jOnBxQ4Sc-5lwhIZ8LQVAhxMbR7qESVuUE",
        "signer_path": "lakehouse/data-extract/v1",
        "alg": "Ed25519",
        "signed": true
      }
    },
    "written_at": "2026-09-02T22:21:17.925Z"
  },
  "cited_facts": [
    {
      "statement": "Researchers led by Charles Schambeau, an associate professor at the University of Central Florida, reported that Centaur 450P/LONEOS is showing signs of transforming into a comet.",
      "source": "Phys.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T22:00:04.000Z",
      "publisher_count": 1,
      "sources": [
        "Phys.org"
      ]
    },
    {
      "statement": "Researchers led by Charles Schambeau, a research associate professor at UCF's Florida Space Institute, detected carbon dioxide gas and icy dust surrounding the Centaur object 450P/LONEOS.",
      "source": "University of Central Florida News | UCF Today",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T13:00:47.000Z",
      "publisher_count": 1,
      "sources": [
        "University of Central Florida News | UCF Today"
      ]
    },
    {
      "statement": "Observations from NASA's James Webb Space Telescope and the Gemini North telescope detected carbon dioxide gas, icy dust, and signs of recent thermal activity surrounding 450P/LONEOS.",
      "source": "Phys.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T22:00:04.000Z",
      "publisher_count": 1,
      "sources": [
        "Phys.org"
      ]
    },
    {
      "statement": "The altered orbit brought the perihelion of 450P/LONEOS closer to Jupiter, increasing solar heating and causing the gradual formation of a faint coma.",
      "source": "Phys.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T22:00:04.000Z",
      "publisher_count": 1,
      "sources": [
        "Phys.org"
      ]
    },
    {
      "statement": "The research team found that a close gravitational encounter with Saturn in 1992 significantly altered the orbit of 450P/LONEOS, moving it inward from a more distant trajectory.",
      "source": "Phys.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T22:00:04.000Z",
      "publisher_count": 1,
      "sources": [
        "Phys.org"
      ]
    },
    {
      "statement": "Charles Schambeau stated that Centaurs are transitional objects originating from the outer solar system that evolve toward becoming Jupiter-family comets.",
      "source": "University of Central Florida News | UCF Today",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T13:00:47.000Z",
      "publisher_count": 1,
      "sources": [
        "University of Central Florida News | UCF Today"
      ]
    },
    {
      "statement": "The study found strong evidence of carbon dioxide emission but no signs of water vapor or carbon monoxide, suggesting carbon dioxide is likely driving the centaur's activity.",
      "source": "University of Central Florida News | UCF Today",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T13:00:47.000Z",
      "publisher_count": 1,
      "sources": [
        "University of Central Florida News | UCF Today"
      ]
    }
  ],
  "note": "A signature proves who filed this and that it has not changed since. It never makes a claim true."
}