{
  "width": 32768,
  "height": 16384,
  "photosphere": "photosphere.png",
  "radianceTexture": null,
  "radianceTiles": [
    {
      "row": 0,
      "col": 0,
      "file": "photosphere-radiance-r0c0.png",
      "x0": 0,
      "x1": 8192,
      "y0": 0,
      "y1": 8192,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 0,
      "col": 1,
      "file": "photosphere-radiance-r0c1.png",
      "x0": 8192,
      "x1": 16384,
      "y0": 0,
      "y1": 8192,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 0,
      "col": 2,
      "file": "photosphere-radiance-r0c2.png",
      "x0": 16384,
      "x1": 24576,
      "y0": 0,
      "y1": 8192,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 0,
      "col": 3,
      "file": "photosphere-radiance-r0c3.png",
      "x0": 24576,
      "x1": 32768,
      "y0": 0,
      "y1": 8192,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 1,
      "col": 0,
      "file": "photosphere-radiance-r1c0.png",
      "x0": 0,
      "x1": 8192,
      "y0": 8192,
      "y1": 16384,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 1,
      "col": 1,
      "file": "photosphere-radiance-r1c1.png",
      "x0": 8192,
      "x1": 16384,
      "y0": 8192,
      "y1": 16384,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 1,
      "col": 2,
      "file": "photosphere-radiance-r1c2.png",
      "x0": 16384,
      "x1": 24576,
      "y0": 8192,
      "y1": 16384,
      "width": 8192,
      "height": 8192
    },
    {
      "row": 1,
      "col": 3,
      "file": "photosphere-radiance-r1c3.png",
      "x0": 24576,
      "x1": 32768,
      "y0": 8192,
      "y1": 16384,
      "width": 8192,
      "height": 8192
    }
  ],
  "displayOverviewSize": [
    8192,
    4096
  ],
  "previewPlate": "render-nebulania-view.png",
  "comparisonPlate": "real-sky-comparison.jpg",
  "realSkyReference": {
    "title": "Milky Way at Chajnantor, ESO/Y. Beletsky",
    "url": "https://commons.wikimedia.org/wiki/File:Milky_Way_at_Chajnantor_(uhd_9428_panorama_eq).jpg",
    "imageUrl": "https://cdn.eso.org/images/large/uhd_9428_panorama_eq.jpg",
    "note": "Long-exposure dark-site panorama; useful for qualitative sky texture, not a one-to-one human-eye brightness target."
  },
  "catalog": "AT-HYG v3.3 full split catalog plus Gaia Sky DR3 large when available",
  "catalogRows": 2552165,
  "usableRows": 2491333,
  "aboveHorizonRows": 1292807,
  "renderedStars": 2491180,
  "brightBloomStars": 4002,
  "gaiaSky": {
    "enabled": true,
    "catalogRoot": "/Users/elinaro/.data/astro/gaiasky/dr3-large/catalog-gaia-dr3-large",
    "particleFiles": 31463,
    "catalogRows": 122183859,
    "renderedStars": 121857481,
    "skippedBrightDuplicates": 324609,
    "minMagnitude": 9.0,
    "limitingMagnitude": 21.0,
    "workers": 8,
    "batchRows": 1600000,
    "coordinateUnits": "Gaia Sky internal units converted to parsecs with U_TO_PC=1/30856775.814913673",
    "format": "Gaia Sky BinaryVersion2/3 particles, compact point-source scatter with parallel decode/project batches",
    "catalogRowsExpected": 122183859,
    "batches": 78,
    "lastVersion": 2,
    "elapsedSeconds": 47.383
  },
  "totalRenderedStars": 124348661,
  "renderedDsoCount": 0,
  "starsOnly": true,
  "elapsedSeconds": 197.601,
  "limitingMagnitude": 17.5,
  "starKernel": {
    "coreSigmaTexels": 0.68,
    "coreRadiusTexels": 3,
    "brightHalo": "compact saturated core plus faint Airy-like glare/spike layer; bright stars are not rendered as broad Gaussian smudges",
    "gaiaFaintLayer": "Gaia Sky faint stars are rendered as compact point-energy samples from catalog positions, not broad procedural impostors."
  },
  "hdrEncoding": {
    "kind": "log2(1 + radiance * scale)",
    "scale": 65536.0,
    "stops": 18.0,
    "viewerDefaultExposureStops": 10.0
  },
  "observerPc": [
    12.261,
    18.397,
    -39.736
  ],
  "enebiGaia": "4680479510336488064",
  "enuliGaia": "4675222436007028608",
  "enuliRa": 191.105073,
  "enuliDec": 5.013436,
  "provisionalSurfaceFrame": "No ground mask is baked into the photosphere. A true surface horizon still needs Betia latitude, pole, season, and local sidereal time.",
  "transportApproximation": "Star-only point-source render: AT-HYG near-field stars plus Gaia Sky DR3 resolved star field, full celestial sphere, mild provisional low-declination color loss, tone mapping, and shader exposure control. Deep-sky objects, nebula impostors, airglow, and synthetic Milky Way backgrounds are disabled.",
  "webglTileSize": [
    8192,
    8192
  ],
  "viewerRadianceTexture": "photosphere-radiance-view.png",
  "viewerRadianceSize": [
    8192,
    4096
  ],
  "observer": "enebi",
  "viewer": {
    "title": "Enebula Betia Photosphere",
    "heading": "Enebula Betia Night-Sky Photosphere",
    "footer": "Texture is an offline render from Enebi. Drag for yaw/pitch; two-finger twist changes roll and FOV.",
    "readoutSuffix": "surface fix  need Betia pole + lat/lon + local sidereal time",
    "initialMarkerId": "enuli",
    "observerName": "Enebi"
  },
  "markers": [
    {
      "id": "enuli",
      "label": "Enuli / Nebulania's star",
      "ra": 191.105073,
      "dec": 5.013436,
      "distancePc": 4.680204,
      "gaia": "4675222436007028608",
      "earthMag": 7.89,
      "absMag": 4.686,
      "color": "#ffd166"
    }
  ]
}
