{
  "plate": "R4073",
  "families": [
    {
      "offset_native": [
        25.63005357760494,
        0.6408606929205689
      ],
      "catalog_pairs": 40,
      "models": [
        {
          "coordinate": "arithmetic_mean",
          "order": 1,
          "train": 30,
          "heldout": 10,
          "heldout_median_native": 0.7477073357645052,
          "heldout_p90_native": 2.0363861986749243,
          "training_median_native": 0.633439653041739
        },
        {
          "coordinate": "arithmetic_mean",
          "order": 2,
          "train": 30,
          "heldout": 10,
          "heldout_median_native": 0.6544076287246228,
          "heldout_p90_native": 1.7972192950219406,
          "training_median_native": 0.6195732802001531
        },
        {
          "coordinate": "brighter_component",
          "order": 1,
          "train": 30,
          "heldout": 10,
          "heldout_median_native": 0.7517299276488834,
          "heldout_p90_native": 1.9976004677172532,
          "training_median_native": 0.6660390862077321
        },
        {
          "coordinate": "brighter_component",
          "order": 2,
          "train": 30,
          "heldout": 10,
          "heldout_median_native": 0.7072854049693182,
          "heldout_p90_native": 1.848261472589387,
          "training_median_native": 0.5496525846539264
        },
        {
          "coordinate": "fainter_component",
          "order": 1,
          "train": 30,
          "heldout": 10,
          "heldout_median_native": 0.9020316705545242,
          "heldout_p90_native": 1.7458783104313642,
          "training_median_native": 0.6833857559817123
        },
        {
          "coordinate": "fainter_component",
          "order": 2,
          "train": 30,
          "heldout": 10,
          "heldout_median_native": 0.6309258198032726,
          "heldout_p90_native": 1.7092816667209163,
          "training_median_native": 0.6345519092878145
        }
      ],
      "holdout_scope": "Entire exposure pairs held out; same catalog identities for all coordinate choices",
      "note": "This smaller, cleaner subset is not directly comparable to earlier full-sample residual summaries. Epoch proper motions remain uncorrected."
    }
  ],
  "interpretation": "Image duplication requires exposure-aware centroids before a physical distortion claim; no new model is installed by this diagnostic"
}