{
  "_meta": {
    "name": "p2",
    "photo": "2.Photometeor-jeff_mod_red.jpg",
    "parhelion_anchor_source": "Phase 2 multi-photo calibration (h=18.6 deg, R22=182, dagger residuals -1/-1 px)",
    "cza_anchor_source": "Task #53 step 2 (2026-05-13): parabola-fit of CZA lower edge in y=[60,138] band, saturation > 22 threshold, 400 edge points across x=[367,767]",
    "cza_apex_residual": {
      "x_px": -6.7,
      "y_px": -19.3,
      "y_pct_r22": -10.6,
      "note": "Y-residual exceeds the 8 px / 0.04*R22 route threshold by ~2.4x. Route still cannot promote because of coverage gate (only p2 eligible: p7 above CZA cutoff, p13 cropped at low h)."
    }
  },
  "sun": [567, 496],
  "r22": 182,
  "r22_source": "ring-fit",
  "r22_source_note": "From Phase 2 multi-photo calibration. p2 is the clean modern halo display with a continuous, unambiguous 22-degree halo arc (image 1 label-key role). R22 is independent of the parhelion offsets. Pass B1 classification 2026-05-13; lever sec(h)-1 = 5.52 percent (eligible).",
  "parhelion": {
    "left_x": 375,
    "right_x": 759,
    "y": 495
  },
  "cza_apex": [560, 113],
  "upper_tangent_manual_samples": {
    "method": "Pass C5 2026-05-14: visual identification from photograph at original display resolution; per-point uncertainty estimated at +/-15 px. Sun and R22 anchors from this file's existing fields used as the coordinate reference. The chromatic dome at the 22-degree halo crown is clearly visible (consistent with Persona 1 section 3 p2 entry: 'clean, brilliantly coloured upper-tangent smile that sits on the 22-degree halo crown exactly where Cowley's standard description places it').",
    "rationale_pointer": "PHASE10_ATTACK_ROADMAP.md Pass C5; PHASE10_OPTICAL_AUDIT_SYNTHETIC_MEMO.md Persona 1 section 5 manual sample selection alternative",
    "points": [
      {"x": 567, "y": 312, "label": "apex at halo crown"},
      {"x": 505, "y": 295, "label": "left inner wing"},
      {"x": 455, "y": 260, "label": "left outer wing"},
      {"x": 630, "y": 295, "label": "right inner wing"},
      {"x": 680, "y": 260, "label": "right outer wing"}
    ]
  }
}