{
  "format": "tessera-hologram",
  "version": 2,
  "id": "brass-solar-orrery",
  "title": "Brass Orrery — The Clockwork Solar System",
  "subject": {
    "category": "machine",
    "accuracy": "generic",
    "synthetic": false,
    "summary": "A showcase interpretation of the requested brass orrery: a large central Sun, eight planet globes on independently rotating, vertically separated counterbalanced arms, and an exposed geared pedestal. No particular historical instrument is reproduced. Dimensions, orbital phases, gear design and animation rates are designed, not measured; distances, sizes and time are deliberately not to astronomical scale. The gear train is an illustrative drive, not an engineered transmission for the eight orbital rates."
  },
  "units": "m",
  "seed": 2187,
  "sources": [
    {
      "id": "request",
      "kind": "user_request",
      "title": "Public showcase orrery request",
      "rights": "user_private",
      "ref": "A brass orrery of the solar system: the sun at the centre and the planets on arms that orbit at different speeds, on a geared base."
    }
  ],
  "facts": [
    {"key":"subject","value":"Brass orrery of the solar system","certainty":"user_supplied","source":"request"},
    {"key":"material","value":"brass","certainty":"user_supplied","source":"request"},
    {"key":"sun.position","value":"Sun at the centre","certainty":"user_supplied","source":"request"},
    {"key":"arms","value":"Planets carried on orbiting arms at different speeds","certainty":"user_supplied","source":"request"},
    {"key":"base","value":"Geared base","certainty":"user_supplied","source":"request"},
    {"key":"design.envelope","value":"5.37 m maximum swept diameter; 1.95 m high; 1.72 m pedestal diameter","certainty":"inferred","note":"Designed monumental showcase proportions, not supplied dimensions. The swept diameter includes Neptune's globe; initial-pose bounds are smaller."},
    {"key":"design.silhouette","value":"Broad turned instrument base, exposed wheels, narrow spindle, a central Sun and a wide fan of eight rising arms","certainty":"inferred","note":"Recognition plan: a clockwork solar model rather than an armillary sphere; retain open space around each globe."},
    {"key":"design.identity","value":"Central Sun; eight mechanically supported orbiting globes including ringed Saturn; visible toothed drive wheels","certainty":"inferred","note":"Three identity features chosen to make the requested machine legible at a glance."},
    {"key":"design.assembly","value":"Plinth, drum and deck; gear bearings and drive; spindle and collars; counterbalanced arms; Sun and inner globes; outer globes and Saturn rings; final instrument lettering","certainty":"inferred","note":"Bottom-up assembly design; all permanent parts are physically supported, not holographic levitation."},
    {"key":"planets","value":"Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune","certainty":"inferred","note":"Conventional eight-planet educational interpretation of solar system; not an astronomical measurement or a supplied inventory."},
    {"key":"design.scale","value":"NOT TO SCALE","certainty":"inferred","note":"Orbital spacing, globe sizes and time are compressed independently for recognition; all planets occupy a common display plane at y=1.65 m."},
    {"key":"design.rates","value":"Mercury 1.50; Venus 1.12; Earth 0.85; Mars 0.64; Jupiter 0.43; Saturn 0.31; Uranus 0.22; Neptune 0.16 rpm","unit":"rpm","certainty":"inferred","note":"Invented ambient exhibition rates preserve faster inner and slower outer motion, not real orbital-period ratios. Every arm, counterweight and globe shares its planet's identical world-axis spin."},
    {"key":"design.clearance","value":"Concentric orbit radii 0.43, 0.65, 0.88, 1.10, 1.39, 1.825, 2.20, 2.58 m; arm bearings descend outward from y=1.38 to 0.96 m in 0.06 m steps","certainty":"inferred","note":"Designed nonintersecting radial tracks: outer beams pass below inner bearings and risers. Outer beam radius is 0.016 m, leaving clearance between adjacent levels."},
    {"key":"design.sun","value":"0.30 m radius Sun on the fixed central spindle","certainty":"inferred","note":"Deliberately oversized central identity mass, not a scale solar diameter."},
    {"key":"design.gears","value":"One 24-tooth wheel and two 16-tooth pinions, horizontal on the exposed deck","certainty":"inferred","note":"Stylized trapezoidal teeth, not involute engineering profiles. Centres are 0.475 m apart; wheels counterrotate at 1.2 and -1.8 rpm. The eight independent arm drives are conceptual and not mechanically resolved."},
    {"key":"design.saturn","value":"Saturn represented by an oblate globe with a continuous tilted annular ring","certainty":"inferred","note":"Familiar identifying convention; tilt and ring radii chosen for readability. A broad solid annulus reaches the globe so this is a supported manufactured model, not a floating torus."},
    {"key":"design.counterweights","value":"Eight turned counterweights on short rearward extensions of the orbital arms","certainty":"inferred","note":"Designed visible mechanism detail; not a calculated balance specification."},
    {"key":"plaque.title","value":"SOLAR ORRERY","certainty":"decorative","note":"Designed display engraving, not an authentic maker's inscription."},
    {"key":"plaque.subtitle","value":"BRASS / EIGHT PLANETS","certainty":"inferred","note":"Display text derived from the supplied brass requirement and chosen eight-planet interpretation."},
    {"key":"plaque.caveat","value":"DESIGNED MODEL / NOT TO SCALE","certainty":"inferred","note":"Visible disclosure of the generic reconstruction and deliberately compressed scales."}
  ],
  "assets": [],
  "parts": [
    {
      "id":"stepped-plinth","label":"Stepped turned foundation","role":"mass","certainty":"inferred","stage":0,"basis":["base","design.envelope"],
      "shape":{"type":"lathe","segments":64,"meridians":12,"profile":[[0.78,0],[0.86,0.025],[0.86,0.065],[0.82,0.09],[0.82,0.13],[0.74,0.18],[0.66,0.18]]},"at":[0,0,0]
    },
    {
      "id":"fluted-drum","label":"Fluted instrument drum","role":"mass","certainty":"inferred","stage":1,"basis":["base","design.envelope"],
      "shape":{"type":"cylinder","radius":0.66,"height":0.22,"segments":64,"ribs":24,"rings":1},"at":[0,0.18,0]
    },
    {
      "id":"overhanging-gear-deck","label":"Exposed gear deck","role":"structure","certainty":"inferred","stage":1,"basis":["base","design.gears"],
      "shape":{"type":"lathe","segments":64,"meridians":8,"profile":[[0.66,0],[0.76,0.018],[0.80,0.025],[0.80,0.055],[0.75,0.065]]},"at":[0,0.40,0]
    },
    {
      "id":"pinion-bearings","role":"structure","certainty":"inferred","stage":1,"basis":["design.gears"],
      "shape":{"type":"cylinder","radius":0.065,"height":0.11,"segments":20,"ribs":4},"at":[-0.475,0.465,0],"repeat":{"count":2,"step":{"at":[0.95,0,0]}}
    },
    {
      "id":"drive-bearing","role":"structure","certainty":"inferred","stage":1,"basis":["design.gears"],
      "shape":{"type":"cylinder","radius":0.105,"height":0.08,"segments":24,"ribs":6},"at":[0,0.465,0]
    },
    {
      "id":"main-drive-wheel","label":"24-tooth drive wheel","role":"identity","certainty":"inferred","stage":2,"basis":["base","design.gears"],
      "shape":{"type":"extrude","axis":"y","height":0.055,"ribs":0,"profile":[[0.275,0.0],[0.299358,0.019621],[0.297433,0.039158],[0.269716,0.05365],[0.26563,0.071175],[0.284079,0.096432],[0.277164,0.114805],[0.24664,0.121629],[0.238157,0.1375],[0.249441,0.166671],[0.238006,0.182628],[0.206756,0.18132],[0.194454,0.194454],[0.197804,0.225552],[0.182628,0.238006],[0.152782,0.228654],[0.1375,0.238157],[0.132687,0.269062],[0.114805,0.277164],[0.088396,0.260406],[0.071175,0.26563],[0.058527,0.294236],[0.039158,0.297433],[0.017986,0.274411],[0.0,0.275],[-0.019621,0.299358],[-0.039158,0.297433],[-0.05365,0.269716],[-0.071175,0.26563],[-0.096432,0.284079],[-0.114805,0.277164],[-0.121629,0.24664],[-0.1375,0.238157],[-0.166671,0.249441],[-0.182628,0.238006],[-0.18132,0.206756],[-0.194454,0.194454],[-0.225552,0.197804],[-0.238006,0.182628],[-0.228654,0.152782],[-0.238157,0.1375],[-0.269062,0.132687],[-0.277164,0.114805],[-0.260406,0.088396],[-0.26563,0.071175],[-0.294236,0.058527],[-0.297433,0.039158],[-0.274411,0.017986],[-0.275,0.0],[-0.299358,-0.019621],[-0.297433,-0.039158],[-0.269716,-0.05365],[-0.26563,-0.071175],[-0.284079,-0.096432],[-0.277164,-0.114805],[-0.24664,-0.121629],[-0.238157,-0.1375],[-0.249441,-0.166671],[-0.238006,-0.182628],[-0.206756,-0.18132],[-0.194454,-0.194454],[-0.197804,-0.225552],[-0.182628,-0.238006],[-0.152782,-0.228654],[-0.1375,-0.238157],[-0.132687,-0.269062],[-0.114805,-0.277164],[-0.088396,-0.260406],[-0.071175,-0.26563],[-0.058527,-0.294236],[-0.039158,-0.297433],[-0.017986,-0.274411],[0.0,-0.275],[0.019621,-0.299358],[0.039158,-0.297433],[0.05365,-0.269716],[0.071175,-0.26563],[0.096432,-0.284079],[0.114805,-0.277164],[0.121629,-0.24664],[0.1375,-0.238157],[0.166671,-0.249441],[0.182628,-0.238006],[0.18132,-0.206756],[0.194454,-0.194454],[0.225552,-0.197804],[0.238006,-0.182628],[0.228654,-0.152782],[0.238157,-0.1375],[0.269062,-0.132687],[0.277164,-0.114805],[0.260406,-0.088396],[0.26563,-0.071175],[0.294236,-0.058527],[0.297433,-0.039158],[0.274411,-0.017986]]},
      "at":[0,0.49,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,0.49,0],"rpm":1.2}
    },
    {
      "id":"twin-pinion-wheels","label":"Counterrotating 16-tooth pinions","role":"structure","certainty":"inferred","stage":2,"basis":["design.gears"],
      "shape":{"type":"extrude","axis":"y","height":0.055,"ribs":0,"profile":[[0.175,0.0],[0.199037,0.019603],[0.196157,0.039018],[0.167465,0.0508],[0.161679,0.06697],[0.176384,0.094279],[0.166294,0.111114],[0.135277,0.111019],[0.123744,0.123744],[0.126879,0.154602],[0.111114,0.166294],[0.082494,0.154336],[0.06697,0.161679],[0.058057,0.191388],[0.039018,0.196157],[0.017153,0.174157],[0.0,0.175],[-0.019603,0.199037],[-0.039018,0.196157],[-0.0508,0.167465],[-0.06697,0.161679],[-0.094279,0.176384],[-0.111114,0.166294],[-0.111019,0.135277],[-0.123744,0.123744],[-0.154602,0.126879],[-0.166294,0.111114],[-0.154336,0.082494],[-0.161679,0.06697],[-0.191388,0.058057],[-0.196157,0.039018],[-0.174157,0.017153],[-0.175,0.0],[-0.199037,-0.019603],[-0.196157,-0.039018],[-0.167465,-0.0508],[-0.161679,-0.06697],[-0.176384,-0.094279],[-0.166294,-0.111114],[-0.135277,-0.111019],[-0.123744,-0.123744],[-0.126879,-0.154602],[-0.111114,-0.166294],[-0.082494,-0.154336],[-0.06697,-0.161679],[-0.058057,-0.191388],[-0.039018,-0.196157],[-0.017153,-0.174157],[0.0,-0.175],[0.019603,-0.199037],[0.039018,-0.196157],[0.0508,-0.167465],[0.06697,-0.161679],[0.094279,-0.176384],[0.111114,-0.166294],[0.111019,-0.135277],[0.123744,-0.123744],[0.154602,-0.126879],[0.166294,-0.111114],[0.154336,-0.082494],[0.161679,-0.06697],[0.191388,-0.058057],[0.196157,-0.039018],[0.174157,-0.017153]]},
      "at":[-0.475,0.49,0],"repeat":{"count":2,"step":{"at":[0.95,0,0]}},"motion":{"type":"spin","axis":[0,1,0],"pivot":[-0.475,0.49,0],"rpm":-1.8}
    },
    {
      "id":"pinion-engraved-rims","role":"detail","certainty":"inferred","stage":2,"basis":["design.gears"],
      "shape":{"type":"torus","major":0.14,"minor":0.008,"segments":32,"sides":6,"rings":4},"at":[-0.475,0.55,0],"repeat":{"count":2,"step":{"at":[0.95,0,0]}}
    },
    {
      "id":"turned-spindle-pedestal","label":"Turned spindle pedestal","role":"mass","certainty":"inferred","stage":2,"basis":["design.silhouette"],
      "shape":{"type":"lathe","segments":40,"meridians":8,"profile":[[0.155,0],[0.18,0.025],[0.18,0.055],[0.13,0.08],[0.095,0.145],[0.095,0.235],[0.125,0.265],[0.155,0.28],[0.155,0.315],[0.11,0.34]]},"at":[0,0.545,0]
    },
    {
      "id":"solar-spindle","label":"Fixed solar spindle","role":"structure","certainty":"inferred","stage":3,"basis":["sun.position","design.sun"],
      "shape":{"type":"cylinder","radius":0.052,"height":0.81,"segments":24,"ribs":4},"at":[0,0.86,0]
    },
    {
      "id":"orbital-bearing-stack","label":"Eight concentric orbital bearings","role":"structure","certainty":"inferred","stage":3,"basis":["arms","design.clearance"],
      "shape":{"type":"lathe","segments":24,"meridians":4,"profile":[[0.105,-0.024],[0.13,-0.016],[0.13,0.016],[0.105,0.024]]},"at":[0,0.96,0],"repeat":{"count":8,"step":{"at":[0,0.06,0]}}
    },
    {
      "id":"neptune-arm","label":"Neptune orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.016,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[2.48,0,0],[2.565,0.04,0],[2.58,0.13,0],[2.58,0.585,0]]},"at":[0,0.96,0],"rotate":[0,-235,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,0.96,0],"rpm":0.16}
    },
    {
      "id":"uranus-arm","label":"Uranus orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.016,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[2.10,0,0],[2.185,0.04,0],[2.20,0.13,0],[2.20,0.525,0]]},"at":[0,1.02,0],"rotate":[0,-115,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.02,0],"rpm":0.22}
    },
    {
      "id":"saturn-arm","label":"Saturn orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.016,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[1.725,0,0],[1.810,0.04,0],[1.825,0.13,0],[1.825,0.44,0]]},"at":[0,1.08,0],"rotate":[0,-325,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.08,0],"rpm":0.31}
    },
    {
      "id":"jupiter-arm","label":"Jupiter orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.016,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[1.29,0,0],[1.375,0.04,0],[1.39,0.13,0],[1.39,0.35,0]]},"at":[0,1.14,0],"rotate":[0,-195,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.14,0],"rpm":0.43}
    },
    {
      "id":"mars-arm","label":"Mars orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.014,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[1.00,0,0],[1.085,0.04,0],[1.10,0.13,0],[1.10,0.38,0]]},"at":[0,1.20,0],"rotate":[0,-75,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.20,0],"rpm":0.64}
    },
    {
      "id":"earth-arm","label":"Earth orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.014,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[0.78,0,0],[0.865,0.04,0],[0.88,0.13,0],[0.88,0.30,0]]},"at":[0,1.26,0],"rotate":[0,-260,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.26,0],"rpm":0.85}
    },
    {
      "id":"venus-arm","label":"Venus orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.014,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[0.55,0,0],[0.635,0.04,0],[0.65,0.13,0],[0.65,0.245,0]]},"at":[0,1.32,0],"rotate":[0,-145,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.32,0],"rpm":1.12}
    },
    {
      "id":"mercury-arm","label":"Mercury orbital arm","role":"structure","certainty":"inferred","stage":4,"basis":["arms","design.clearance","design.rates"],
      "shape":{"type":"tube","radius":0.014,"sides":6,"samples":4,"longitudinal":2,"ring_every":0,"path":[[-0.25,0,0],[0,0,0],[0.33,0,0],[0.415,0.04,0],[0.43,0.13,0],[0.43,0.21,0]]},"at":[0,1.38,0],"rotate":[0,-15,0],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.38,0],"rpm":1.5}
    },
    {"id":"mercury-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[-0.241481,1.38,-0.064705],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.38,0],"rpm":1.5}},
    {"id":"venus-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[0.204788,1.32,-0.143394],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.32,0],"rpm":1.12}},
    {"id":"earth-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[0.043412,1.26,0.246202],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.26,0],"rpm":0.85}},
    {"id":"mars-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[-0.064705,1.20,-0.241481],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.20,0],"rpm":0.64}},
    {"id":"jupiter-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[0.241481,1.14,0.064705],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.14,0],"rpm":0.43}},
    {"id":"saturn-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[-0.204788,1.08,0.143394],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.08,0],"rpm":0.31}},
    {"id":"uranus-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[0.105655,1.02,-0.226577],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.02,0],"rpm":0.22}},
    {"id":"neptune-counterweight","role":"detail","certainty":"inferred","stage":4,"basis":["design.counterweights"],"shape":{"type":"lathe","segments":16,"meridians":4,"profile":[[0.04,-0.023],[0.052,-0.015],[0.052,0.015],[0.04,0.023]]},"at":[0.143394,0.96,0.204788],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,0.96,0],"rpm":0.16}},
    {
      "id":"central-sun","label":"Central Sun","role":"identity","certainty":"inferred","stage":5,"basis":["sun.position","design.sun"],
      "shape":{"type":"sphere","radius":0.30,"lat":12,"lon":16},"at":[0,1.65,0]
    },
    {"id":"mercury","label":"Mercury","role":"mass","certainty":"inferred","stage":5,"basis":["planets","design.scale","design.rates"],"shape":{"type":"sphere","radius":0.06,"lat":5,"lon":6},"at":[0.415348,1.65,0.111292],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.38,0],"rpm":1.5}},
    {"id":"venus","label":"Venus","role":"mass","certainty":"inferred","stage":5,"basis":["planets","design.scale","design.rates"],"shape":{"type":"sphere","radius":0.085,"lat":6,"lon":8},"at":[-0.532449,1.65,0.372825],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.32,0],"rpm":1.12}},
    {"id":"earth","label":"Earth","role":"mass","certainty":"inferred","stage":5,"basis":["planets","design.scale","design.rates"],"shape":{"type":"sphere","radius":0.09,"lat":7,"lon":10},"at":[-0.15281,1.65,-0.866631],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.26,0],"rpm":0.85}},
    {"id":"mars","label":"Mars","role":"mass","certainty":"inferred","stage":5,"basis":["planets","design.scale","design.rates"],"shape":{"type":"sphere","radius":0.07,"lat":5,"lon":8},"at":[0.284701,1.65,1.062518],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.20,0],"rpm":0.64}},
    {"id":"jupiter","label":"Jupiter","role":"mass","certainty":"inferred","stage":6,"basis":["planets","design.scale","design.rates"],"shape":{"type":"sphere","radii":[0.17,0.16,0.17],"lat":12,"lon":8},"at":[-1.342637,1.65,-0.359758],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.14,0],"rpm":0.43}},
    {"id":"saturn","label":"Saturn","role":"mass","certainty":"inferred","stage":6,"basis":["planets","design.saturn","design.rates"],"shape":{"type":"sphere","radii":[0.14,0.13,0.14],"lat":8,"lon":8},"at":[1.494952,1.65,-1.046777],"rotate":[24,0,12],"motion":{"type":"spin","axis":[0,1,0],"pivot":[0,1.08,0],"rpm":0.31}},
    {
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      "id":"instrument-nameplate","label":"Designed exhibition nameplate","role":"detail","certainty":"inferred","stage":7,"basis":["plaque.title","plaque.subtitle","plaque.caveat"],
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    "framing":{"yaw":30,"pitch":28,"fit":1.25},
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      {"id":"sun-and-bearings","label":"Central Sun and orbital bearings","yaw":-22,"pitch":16,"distance":2.4,"target":"central-sun"},
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    "assembly":{"style":"ceremony","seconds":10,"interference":false},
    "idle":{"life":"calm","events":["sweep","shimmer"],"cadence":[10,18],"strength":0.22},
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}