{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.klemperer-rosette","code":"thing-q4396596","url":"https://ver.cy/models/thing/q4396596/","name":"Klemperer rosette","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.SPC"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A hypothetical gravitational configuration proposed by Wolfgang Klemperer in 1962 in which bodies of equal or alternating masses orbit a common centre under mutual gravity in a symmetric arrangement that can comprise two interleaved regular polygons with different radii; rosettes are exact solutions of the n-body problem but are unstable to perturbations and are not observed in nature, appearing mainly in celestial mechanics and science fiction.","purpose":"Let an agent explain the Klemperer rosette concept, its mathematical basis and instability, and its uses in fiction and thought experiments, with attribution.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Symmetric n-body configuration","Exact but unstable solution","Not observed","Popular in fiction"],"structure":{"bundles":[{"id":"concept","name":"Concept","description":"What a rosette is.","layers":[{"id":"definition","name":"Definition","description":"The configuration.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What did Klemperer propose, and what arrangements did he analyse?","kind":"provenance"},{"text":"How does the configuration satisfy the equations of motion?","kind":"definition"}]}]},{"id":"variants","name":"Variants","description":"Kinds of rosette.","findings":[{"id":"variants-finding","name":"Variants","description":"Variants.","questions":[{"text":"How do equal-mass and alternating-mass rosettes differ?","kind":"definition"},{"text":"How do they relate to other central configurations?","kind":"definition"}]}]}]},{"id":"stability","name":"Stability","description":"Why they do not exist.","layers":[{"id":"instability","name":"Instability","description":"Perturbations.","findings":[{"id":"instability-finding","name":"Instability","description":"Instability.","questions":[{"text":"Why is a rosette unstable to small perturbations, and how quickly does it break up?","kind":"definition"},{"text":"Could active correction maintain one?","kind":"boundary"}]}]},{"id":"compare","name":"Compare","description":"Stable configurations.","findings":[{"id":"compare-finding","name":"Compare","description":"Comparison.","questions":[{"text":"How do rosettes compare with stable configurations such as Lagrange points?","kind":"definition"},{"text":"Which entry fits Lagrange points?","kind":"action"}]}]}]},{"id":"fiction","name":"Fiction","description":"Rosettes in culture.","layers":[{"id":"uses","name":"Uses","description":"In fiction.","findings":[{"id":"uses-finding","name":"Uses","description":"Fiction.","questions":[{"text":"How have rosettes been used in science fiction and games?","kind":"provenance"},{"text":"Are they presented as speculative?","kind":"boundary"}]}]},{"id":"megastructures","name":"Megastructures","description":"Engineered systems.","findings":[{"id":"megastructures-finding","name":"Megastructures","description":"Megastructures.","questions":[{"text":"How do rosettes feature in discussions of hypothetical megastructures?","kind":"provenance"},{"text":"What physical limits apply?","kind":"boundary"}]}]}]},{"id":"learn","name":"Learn","description":"Study.","layers":[{"id":"simulate","name":"Simulate","description":"Simulating a rosette.","findings":[{"id":"simulate-finding","name":"Simulate","description":"Simulation.","questions":[{"text":"How can a rosette be simulated numerically to show its instability?","kind":"action"},{"text":"Which tools suit teaching?","kind":"provenance"}]}]},{"id":"explain","name":"Explain","description":"Plain language.","findings":[{"id":"explain-finding","name":"Explain","description":"Plain explanation.","questions":[{"text":"How can the rosette be explained simply while noting it is theoretical?","kind":"action"},{"text":"Which caveats apply?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Describe the Klemperer rosette and its stability from astrophysics sources.","Note that no such system is known to exist in nature."],"mustNot":["Present the configuration as an observed system.","Misattribute its proposal or date.","Use it to support pseudoscientific claims."],"requiresHuman":["Publishing new stability results as established."]},"ethics":{"considerations":["Accurate description of hypothetical systems keeps science and fiction distinct.","Fringe claims borrow real-sounding concepts to mislead."],"affectedParties":["Students","Readers of science"]},"owners":{"steward":"Nobody owns the concept; astrophysics researchers document it.","roles":[],"masterSystems":[]},"relations":[{"target":"Q15053549","type":"parent","note":"registry parent class"},{"target":"gravitationally bound system","type":"related","note":"category"},{"target":"celestial mechanics","type":"related","note":"field"},{"target":"superior planet","type":"related","note":"orbital concepts"},{"target":"black star","type":"related","note":"other theoretical object"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.klemperer-rosette","Wikidata: Q4396596 (https://www.wikidata.org/wiki/Q4396596)"]},"properties":{"applicability":"required","items":["Body mass:  kilogram - Mass is specified for each body in the mathematical model, with no established natural population providing a typical range.","Orbital radius:  metre - Radius is the distance from a body's centre to the common centre of the idealized configuration.","Rotation period:  second - Period is the time required for the idealized configuration to complete one revolution."]},"recognition":{"applicability":"required","items":["Polygonal arrangement of orbiting bodies","Theoretical solution","Real planetary systems are not rosettes","Not observed; a symmetric arrangement of bodies in diagrams."]},"capabilities":{"applicability":"required","items":["explain the configuration and its origin","explain why it is unstable","describe uses in fiction and thought experiments","clarify that none are observed"]},"hazards":{"applicability":"required","items":["Presenting rosettes as physically realised","Confusing with stable Lagrange configurations"]},"interfaces":{"applicability":"required","items":["No regulation"]},"context":{"applicability":"required","items":["Celestial mechanics and imagination.","rosettes with equal masses","rosettes with alternating masses","related central configurations","fictional rosettes"]}},"sources":[{"title":"Wikidata item Q4396596: Klemperer rosette","url":"https://www.wikidata.org/wiki/Q4396596","note":"identity and sense of the item"},{"title":"Wikipedia: Klemperer rosette","url":"https://en.wikipedia.org/wiki/Klemperer_rosette","note":"general description of the item"}],"openQuestions":["Should central configurations be a separate entry?","How should the original paper be linked?","How should fictional uses be catalogued?"],"resources":{"spec":"/models/things/publications/thing-q4396596/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q4396596/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T20:31:50Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T12:16:33+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}