{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.kreutz-sungrazers","code":"thing-q386772","url":"https://ver.cy/models/thing/q386772/","name":"Kreutz sungrazers","alternateNames":[],"kind":"thing","status":"research-draft","version":"0.2.0-wave.1","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 family of sungrazing comets with very similar orbits that pass extremely close to the Sun at perihelion, thought to be fragments of a single large comet that broke up; named after Heinrich Kreutz, it includes the Great Comet of 1882 and Comet Ikeya-Seki, and thousands of small members have been found by the SOHO spacecraft.","purpose":"Let an agent explain Kreutz sungrazers by orbit, history, notable members, detection and fate near the Sun, with sourced findings.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Common parent body","Extremely close perihelia","Many fragments","Most small members disintegrate"],"structure":{"bundles":[{"id":"family","name":"Family","description":"Membership.","layers":[{"id":"orbit","name":"Orbit","description":"Orbital elements.","findings":[{"id":"orbit-finding","name":"Orbit","description":"Orbital elements.","questions":[{"text":"Which orbital elements identify a comet as a Kreutz sungrazer?","kind":"definition"},{"text":"How close does it pass to the Sun?","kind":"measurement"}]}]},{"id":"origin","name":"Origin","description":"Parent comet.","findings":[{"id":"origin-finding","name":"Origin","description":"Origin.","questions":[{"text":"What do astronomers propose about the parent comet and its break-up?","kind":"provenance"},{"text":"How certain is the history?","kind":"boundary"}]}]}]},{"id":"members","name":"Members","description":"Notable comets.","layers":[{"id":"great","name":"Great comets","description":"Bright members.","findings":[{"id":"great-finding","name":"Great comets","description":"Great comets.","questions":[{"text":"Which great comets belong to the family, according to sources?","kind":"provenance"},{"text":"How bright did they become?","kind":"measurement"}]}]},{"id":"soho","name":"SOHO","description":"Small fragments.","findings":[{"id":"soho-finding","name":"SOHO","description":"SOHO discoveries.","questions":[{"text":"How many Kreutz comets has SOHO discovered, according to the mission?","kind":"provenance"},{"text":"How can amateurs help find them?","kind":"action"}]}]}]},{"id":"physics","name":"Physics","description":"Near the Sun.","layers":[{"id":"fate","name":"Fate","description":"Survival.","findings":[{"id":"fate-finding","name":"Fate","description":"Fate at perihelion.","questions":[{"text":"Why do most small members disintegrate near the Sun?","kind":"definition"},{"text":"Which comets survived?","kind":"provenance"}]}]},{"id":"corona","name":"Corona","description":"Solar environment.","findings":[{"id":"corona-finding","name":"Corona","description":"Solar environment.","questions":[{"text":"What can sungrazers reveal about the solar corona?","kind":"provenance"},{"text":"Which studies use them?","kind":"provenance"}]}]}]},{"id":"observing","name":"Observing","description":"Viewing.","layers":[{"id":"view","name":"View","description":"Seeing a sungrazer.","findings":[{"id":"view-finding","name":"View","description":"Viewing.","questions":[{"text":"When and where could a bright sungrazer be seen safely?","kind":"provenance"},{"text":"Why must the Sun never be viewed directly?","kind":"boundary"}]}]},{"id":"forecast","name":"Forecast","description":"Brightness forecasts.","findings":[{"id":"forecast-finding","name":"Forecast","description":"Forecasts.","questions":[{"text":"How reliable are brightness predictions for new sungrazers?","kind":"boundary"},{"text":"Which sources publish them?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe the Kreutz family and its members from published orbital data.","Report new sungrazer discoveries with their source and confirmation status."],"mustNot":["Claim that a sungrazer threatens Earth without evidence.","Present the breakup history of the family as settled when it remains a hypothesis.","Credit a discovery to the wrong observer or omit amateur discoverers."],"requiresHuman":["Announcing a new member of the family as confirmed."]},"ethics":{"considerations":["Comet scares spread quickly; accurate reporting prevents needless fear.","Many sungrazers are found by amateurs whose credit should be respected."],"affectedParties":["The public","Amateur and professional astronomers"]},"owners":{"steward":"Nobody: natural objects held in common; the astronomical community names and catalogues them.","roles":[],"masterSystems":["Minor Planet Center comet and orbit catalogues"]},"relations":[{"target":"Q3575238","type":"parent","note":"registry parent class"},{"target":"sungrazing comet","type":"related","note":"category"},{"target":"Heinrich Kreutz","type":"related","note":"person"},{"target":"SOHO","type":"related","note":"spacecraft"},{"target":"comet","type":"related","note":"class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.kreutz-sungrazers","Wikidata: Q386772 (https://www.wikidata.org/wiki/Q386772)"]},"properties":{"applicability":"required","items":[]},"recognition":{"applicability":"required","items":["Very small perihelion distances","Coronagraph detections by SOHO","Other sungrazer groups have different orbits","Bright comets with long tails near the Sun, or tiny streaks in coronagraph images."]},"capabilities":{"applicability":"required","items":["explain what makes a comet a Kreutz sungrazer","describe famous members","find SOHO comet discoveries","explain what happens at perihelion"]},"hazards":{"applicability":"required","items":["Predicting brightness too confidently","Sensational claims about comets and the Sun"]},"interfaces":{"applicability":"required","items":["Minor Planet Center comet designations"]},"context":{"applicability":"required","items":["Understanding comet fragmentation and solar environment.","great Kreutz comets","small SOHO-discovered fragments","subgroups of the Kreutz family"]}},"sources":[],"openQuestions":["Should each great comet be a separate entry?","How should SOHO discovery counts be linked?","How should subgroups be recorded?"],"resources":{"spec":"/models/things/publications/thing-q386772/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q386772/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T13:33:51Z","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":"missing","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"missing"},"notes":{"sources":"Written from model knowledge without web access; claims are unverified."},"score":0.882}}