{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.mars-crossing-asteroid","code":"thing-q777140","url":"https://ver.cy/models/thing/q777140/","name":"Mars-crossing asteroid","alternateNames":[],"kind":"thing","status":"research-draft","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"","entryKind":"","plane":"","domain":["PHY.SPC"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"An asteroid whose orbit crosses that of Mars, defined by the Minor Planet Center as having a perihelion distance between about 1.3 and 1.666 astronomical units; examples include 132 Aethra and 323 Brucia, the first Mars-crosser discovered.","purpose":"Let an agent handle Mars-crossing asteroids by orbital definition, examples, dynamics and relation to near-Earth asteroids.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Orbit crosses Mars","Defined by perihelion distance","Dynamically unstable over long times","Source of some near-Earth asteroids"],"structure":{"bundles":[{"id":"definition","name":"Definition","description":"What counts.","layers":[{"id":"criterion","name":"Criterion","description":"Perihelion range.","findings":[{"id":"criterion-finding","name":"Criterion","description":"Perihelion criterion.","questions":[{"text":"What is the perihelion distance of this asteroid?","kind":"measurement"},{"text":"Does it fall within the Mars-crosser range?","kind":"boundary"}]}]},{"id":"crossing","name":"Crossing","description":"Orbit crossing.","findings":[{"id":"crossing-finding","name":"Crossing","description":"Orbit crossing.","questions":[{"text":"Does crossing the orbit of Mars mean it can collide with Mars?","kind":"boundary"},{"text":"What else is needed for a close approach?","kind":"definition"}]}]}]},{"id":"examples","name":"Examples","description":"Known objects.","layers":[{"id":"known","name":"Known","description":"Examples.","findings":[{"id":"known-finding","name":"Known","description":"Examples.","questions":[{"text":"Which notable Mars-crossers are known?","kind":"provenance"},{"text":"When were they discovered?","kind":"provenance"}]}]},{"id":"data","name":"Data","description":"Orbital elements.","findings":[{"id":"data-finding","name":"Data","description":"Orbital data.","questions":[{"text":"Where can current orbital elements be found?","kind":"provenance"},{"text":"How precise are they?","kind":"measurement"}]}]}]},{"id":"dynamics","name":"Dynamics","description":"Evolution.","layers":[{"id":"evolution","name":"Evolution","description":"Orbital evolution.","findings":[{"id":"evolution-finding","name":"Evolution","description":"Orbital evolution.","questions":[{"text":"How do encounters with Mars change these orbits over time?","kind":"definition"},{"text":"Can they become near-Earth asteroids?","kind":"provenance"}]}]},{"id":"sources","name":"Sources","description":"Origins.","findings":[{"id":"sources-finding","name":"Sources","description":"Origins.","questions":[{"text":"Where do Mars-crossers come from, according to dynamical studies?","kind":"provenance"},{"text":"Which resonances feed them?","kind":"definition"}]}]}]},{"id":"risk","name":"Risk","description":"Earth relevance.","layers":[{"id":"earth","name":"Earth","description":"Earth approach.","findings":[{"id":"earth-finding","name":"Earth","description":"Earth relevance.","questions":[{"text":"Does this object come close to Earth, according to official risk lists?","kind":"provenance"},{"text":"How should risk be explained calmly?","kind":"action"}]}]},{"id":"observe","name":"Observe","description":"Amateur observing.","findings":[{"id":"observe-finding","name":"Observe","description":"Observing.","questions":[{"text":"Can this asteroid be observed with amateur telescopes?","kind":"boundary"},{"text":"How can observations be reported?","kind":"action"}]}]}]}]},"agentConduct":{"may":["check whether an asteroid is a Mars-crosser","explain the orbital definition","describe how Mars-crossers evolve","find orbital data"],"mustNot":[],"requiresHuman":[]},"ethics":{"considerations":["An asteroid whose orbit crosses that of Mars, defined by the Minor Planet Center as having a perihelion distance between about 1.3 and 1.666 astronomical units; examples include 132 Aethra and 323 Brucia, the first Mars-crosser discovered.","planet-crossing minor planet","Minor Planet Center","Minor Planet Center orbit classifications"],"affectedParties":[]},"owners":{"steward":"","roles":[],"masterSystems":[]},"relations":[{"target":"planet-crossing minor planet","type":"related","note":"category"},{"target":"orbit of Mars","type":"related","note":"orbit"},{"target":"near-Earth asteroid","type":"related","note":"related group"},{"target":"Minor Planet Center","type":"related","note":"catalogue"}],"interaction":{"identity":{"applicability":"required","items":[]},"properties":{"applicability":"required","items":[]},"recognition":{"applicability":"required","items":["Perihelion between about 1.3 and 1.666 AU","Orbits crossing Mars","Near-Earth asteroids have perihelia below 1.3 AU","Not visible to the naked eye; points of light in telescopic images and orbits in diagrams."]},"capabilities":{"applicability":"required","items":["check whether an asteroid is a Mars-crosser","explain the orbital definition","describe how Mars-crossers evolve","find orbital data"]},"hazards":{"applicability":"required","items":["Confusing orbit crossing with collision risk","Using outdated orbital elements"]},"interfaces":{"applicability":"required","items":["Minor Planet Center orbit classifications"]},"context":{"applicability":"required","items":["Classifying asteroid orbits in planetary science.","Mars-crossers from the inner main belt","Hungaria-region crossers","long-lived and transient crossers"]}},"sources":[],"openQuestions":["Should each asteroid be a separate entry?","How should orbit databases be linked?","How should classification boundaries be recorded?","How should risk be explained calmly?","How can observations be reported?"],"resources":{"spec":"/models/things/publications/thing-q777140/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q777140/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T12:48:55Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"derived","ethics":"derived","owners":"missing","relations":"filled","interaction.identity":"missing","interaction.properties":"missing","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"missing"},"notes":{"agentConduct":"Affordances listed as what may be done; prohibitions collected from the text.","sources":"Written from model knowledge without web access; claims are unverified."},"score":0.706}}