{
  "site": "glacier",
  "siteName": "Glacier National Park",
  "region": "St. Mary, MT",
  "date": "2026-11-09",
  "score": 71,
  "verdict": "Good",
  "headline": "Good night. No moon all night, clear skies.",
  "headlineLead": "Good night",
  "headlineDetail": "no moon all night, clear skies",
  "milkyWay": {
    "visible": false,
    "maxAltitudeDeg": -3.1,
    "hoursUseful": 0,
    "bestAt": null,
    "note": "Milky Way core below the horizon all night. It is a summer object here, roughly late April to early September"
  },
  "window": {
    "darkFrom": "6:51pm",
    "darkTo": "5:47am",
    "hours": 10.92,
    "bestFrom": "6:51pm",
    "bestTo": "5:47am"
  },
  "factors": [
    {
      "key": "cloud",
      "name": "Cloud",
      "score": 89,
      "weight": 32,
      "note": "10% cloud, essentially clear"
    },
    {
      "key": "moon",
      "name": "Moon",
      "score": 100,
      "weight": 26,
      "note": "new moon, below the horizon all night, so no moonlight at all"
    },
    {
      "key": "darkness",
      "name": "Darkness",
      "score": 100,
      "weight": 16,
      "note": "10h55m of astronomical darkness, 6:51pm–5:47am"
    },
    {
      "key": "transparency",
      "name": "Transparency",
      "score": 5,
      "weight": 10,
      "note": "Dewpoint spread 2.5°C, some haze possible"
    },
    {
      "key": "targets",
      "name": "Targets",
      "score": 0,
      "weight": 16,
      "note": "Leonids running, about 0 an hour at best"
    }
  ],
  "weatherBacked": true,
  "confidence": "full",
  "dataSources": {
    "astronomy": "SunCalc (local computation)",
    "weather": "Open-Meteo"
  }
}