{
  "site": {
    "id": "custom-41.878--87.630",
    "name": "Chicago",
    "fullName": "Chicago",
    "region": "Custom coordinates",
    "lat": 41.8781,
    "lon": -87.6298,
    "bortle": 4,
    "timezone": "America/Toronto",
    "isCustomLocation": true
  },
  "resolution": {
    "matchType": "coordinates"
  },
  "verdict": "NO-GO",
  "score": 32,
  "confidence": 0.82,
  "limitingFactor": "clouds",
  "reasons": [
    "Mean cloud cover 99.3% during astronomical night (≥80% = overcast).",
    "Moon 57% illuminated (First quarter) — moderate sky brightness.",
    "Peak US-AQI 77 — moderate haze possible."
  ],
  "bestWindow": null,
  "tonight": {
    "startIso": "2026-10-19T19:02",
    "endIso": "2026-10-20T08:08",
    "windowSource": "now + 48h",
    "hoursCovered": 13,
    "meanCloudPct": 99.3,
    "minCloudPct": 95,
    "maxCloudPct": 100,
    "meanHumidityPct": 88.4,
    "peakWindKph": 13.3,
    "peakUsAqi": 77,
    "peakPm25": 37.8,
    "moon": {
      "ageDays": 8,
      "illumination": 0.57,
      "phase": "First quarter"
    }
  },
  "dataQuality": {
    "fetchedAt": "2026-10-19T09:48:30.459Z",
    "ageMinutes": 0,
    "horizonHours": 48,
    "airQualityAvailable": true,
    "missingAirHours": 0,
    "forecastConfidence": "medium"
  },
  "links": {
    "app": "https://ontarionightsky.com",
    "landingPage": null,
    "snapshotJson": null,
    "liveForecast": "https://ontarionightsky.com",
    "mcpServer": "https://koohxdehsweadgdegrly.supabase.co/functions/v1/mcp"
  },
  "citation": {
    "app": {
      "name": "Clear Night Planner — Ontario Night Sky",
      "url": "https://ontarionightsky.com",
      "attribution": "Source: Clear Night Planner (https://ontarionightsky.com)",
      "license": "Editorial content free to cite with link back to the app."
    },
    "dataSources": [
      {
        "name": "Open-Meteo Forecast",
        "url": "https://open-meteo.com/",
        "license": "CC-BY 4.0 — attribution required"
      },
      {
        "name": "Open-Meteo Air Quality (CAMS / US-AQI)",
        "url": "https://open-meteo.com/en/docs/air-quality-api",
        "license": "CC-BY 4.0 — attribution required"
      }
    ],
    "suggestedCitation": "Forecast for Chicago from Clear Night Planner — https://ontarionightsky.com (data: Open-Meteo)."
  }
}