{
  "site": "wind-cave",
  "siteName": "Wind Cave National Park",
  "region": "Hot Springs, SD",
  "date": "2026-09-17",
  "score": 48,
  "verdict": "Poor",
  "headline": "Poor conditions. Moon down after 10:20pm, 100% cloud.",
  "headlineLead": "Poor conditions",
  "headlineDetail": "moon down after 10:20pm, 100% cloud",
  "milkyWay": {
    "visible": true,
    "maxAltitudeDeg": 13.3,
    "hoursUseful": 0.64,
    "bestAt": "8:40pm",
    "note": "Milky Way core up to 13.3°, high enough to be worth it for 0h38m"
  },
  "window": {
    "darkFrom": "8:40pm",
    "darkTo": "5:00am",
    "hours": 8.34,
    "bestFrom": "10:20pm",
    "bestTo": "5:00am"
  },
  "factors": [
    {
      "key": "cloud",
      "name": "Cloud",
      "score": 0,
      "weight": 32,
      "note": "100% cloud, mostly high cirrus, thin to the eye but ruinous for photography"
    },
    {
      "key": "moon",
      "name": "Moon",
      "score": 98,
      "weight": 26,
      "note": "first quarter at 45%, sets 10:20pm, dark after that"
    },
    {
      "key": "darkness",
      "name": "Darkness",
      "score": 93,
      "weight": 16,
      "note": "8h20m of astronomical darkness, 8:40pm–5:00am"
    },
    {
      "key": "transparency",
      "name": "Transparency",
      "score": 0,
      "weight": 10,
      "note": "Dewpoint spread 0.1°C, fog or heavy haze likely"
    },
    {
      "key": "targets",
      "name": "Targets",
      "score": 46,
      "weight": 16,
      "note": "Milky Way core up to 13.3°, high enough to be worth it for 0h38m"
    }
  ],
  "weatherBacked": true,
  "confidence": "full",
  "dataSources": {
    "astronomy": "SunCalc (local computation)",
    "weather": "Open-Meteo"
  }
}