{ "model": { "rank": 6551, "code": "thing-q193139", "model_id": "vr.tr.trajectory", "name": "trajectory", "purpose": "Let an agent explain trajectories as curves in mathematics and spaceflight: how they are computed, represented and used in mission design, without weapons-related detail.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.QLT", "industry": "", "version": "", "url": "/models/thing/q193139/", "tier": 2, "score": 60, "payload": { "layer": "wikidata", "aliases": [ "cyclocross track", "trans-lunar injection", "cycler", "lunar cycler", "Mars cycler", "orbit insertion", "hyperbolic anomaly", "escape trajectory", "path of totality", "shuttle route", "path of least resistance", "limit cycle", "parabolic trajectory", "flight trajectory", "orthogonal trajectory", "hyperbolic trajectory", "circumlunar trajectory", "flyway", "handling course", "Songline", "line-of-sight propagation", "line-of-sight", "route", "free-return trajectory", "pathline", "world line", "parabolic flight" ], "aliasCount": 27, "merged": 27, "knownIn": 60, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.trajectory", "source": { "dataset": "wikidata", "item": "Q193139", "url": "https://www.wikidata.org/wiki/Q193139", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T12:56:33Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 1, "engine": "claude" }, "metaModel": { "id": "THING-Q193139", "registryId": "vr.tr.trajectory", "name": "trajectory", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.QLT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q193139/", "model": { "registry_id": "vr.tr.trajectory", "name": "trajectory", "purpose": "Let an agent explain trajectories as curves in mathematics and spaceflight: how they are computed, represented and used in mission design, without weapons-related detail.", "definition": "A curve describing the path of a moving body through space as a function of time, including orbits and transfer paths in spaceflight such as trans-lunar injection and cycler trajectories, and in mathematics the solution curves of dynamical systems; weapons ballistics is excluded here.", "what_it_is_for": "Mission design, dynamics and mathematical modelling.", "affordances": [ "describe trajectories as curves and solutions", "explain spaceflight manoeuvres such as injections and insertions", "find mission trajectory data", "relate trajectories to phase space" ], "distinguishing_features": [ "Curve parametrised by time", "Determined by initial conditions and forces", "Designed for missions", "Studied in dynamical systems" ], "appearance": "Not physical; curves drawn in diagrams, simulations and mission plans.", "visual_identification": [ "Orbit and transfer diagrams", "Phase space curves", "A career path is a figurative sense" ], "physical_properties": [], "families_and_kinds": [ "orbital transfers", "injection and insertion manoeuvres", "cycler trajectories", "phase space trajectories", "sports and race tracks (figurative extension)" ], "related_models": [ { "relation": "is a kind of", "target": "curve", "why": "category" }, { "relation": "is related to", "target": "trajectory", "why": "physics entry" }, { "relation": "is used in", "target": "spaceflight mission design", "why": "application" }, { "relation": "is studied in", "target": "dynamical systems", "why": "field" } ], "identifiers": [], "standards_and_regulation": [ "Space agency mission design standards", "Space debris mitigation guidelines" ], "failure_modes_and_hazards": [ "Providing weapons trajectory or targeting detail", "Confusing reference frames" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "math", "name": "Mathematics", "description": "Curves.", "rationale": "Trajectories are curves.", "layers": [ { "id": "curve", "name": "Curve", "description": "Parametrisation.", "findings": [ { "id": "curve-finding", "name": "Curve", "description": "Parametric curve.", "questions": [ { "text": "How is a trajectory represented as a parametric curve?", "kind": "definition" }, { "text": "What determines it uniquely?", "kind": "definition" } ] } ] }, { "id": "phase", "name": "Phase space", "description": "Dynamical systems.", "findings": [ { "id": "phase-finding", "name": "Phase space", "description": "Phase space.", "questions": [ { "text": "What does a trajectory in phase space show about a system?", "kind": "definition" }, { "text": "How are fixed points and cycles identified?", "kind": "definition" } ] } ] } ] }, { "id": "space", "name": "Spaceflight", "description": "Mission design.", "rationale": "Missions plan paths.", "layers": [ { "id": "manoeuvres", "name": "Manoeuvres", "description": "Injections and insertions.", "findings": [ { "id": "manoeuvres-finding", "name": "Manoeuvres", "description": "Manoeuvres.", "questions": [ { "text": "What is a trans-lunar injection or orbit insertion, in general terms?", "kind": "definition" }, { "text": "Which missions used them?", "kind": "provenance" } ] } ] }, { "id": "cyclers", "name": "Cyclers", "description": "Cycler orbits.", "findings": [ { "id": "cyclers-finding", "name": "Cyclers", "description": "Cycler trajectories.", "questions": [ { "text": "What is a cycler trajectory between Earth and Mars, according to studies?", "kind": "provenance" }, { "text": "Has one been flown?", "kind": "provenance" } ] } ] } ] }, { "id": "data", "name": "Data", "description": "Ephemerides.", "rationale": "Data describe paths.", "layers": [ { "id": "ephemeris", "name": "Ephemeris", "description": "Trajectory data.", "findings": [ { "id": "ephemeris-finding", "name": "Ephemeris", "description": "Ephemerides.", "questions": [ { "text": "Where can the trajectory data for this mission be found?", "kind": "provenance" }, { "text": "In which reference frame?", "kind": "definition" } ] } ] }, { "id": "compute", "name": "Compute", "description": "Simulation.", "findings": [ { "id": "compute-finding", "name": "Compute", "description": "Computation.", "questions": [ { "text": "Which tools compute trajectories for education or research?", "kind": "provenance" }, { "text": "What accuracy is needed?", "kind": "boundary" } ] } ] } ] }, { "id": "limits", "name": "Limits", "description": "Agent conduct.", "rationale": "No weapons help.", "layers": [ { "id": "weapons", "name": "Weapons", "description": "No ballistics for harm.", "findings": [ { "id": "weapons-finding", "name": "Weapons", "description": "Weapons limits.", "questions": [ { "text": "Does the request seek weapons trajectories or targeting calculations?", "kind": "boundary" }, { "text": "How should the agent decline?", "kind": "action" } ] } ] }, { "id": "figurative", "name": "Figurative", "description": "Other senses.", "findings": [ { "id": "figurative-finding", "name": "Figurative", "description": "Figurative sense.", "questions": [ { "text": "Is a figurative trajectory or a race track layout meant?", "kind": "boundary" }, { "text": "Which entry fits?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should manoeuvre types be separate entries?", "How should mission ephemerides be linked?", "How should this entry be merged with the physics entry?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a trajectory, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain trajectories as curves in mathematics and spaceflight: how they are computed, represented and used in mission design, without weapons-related detail.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: cyclocross track, trans-lunar injection, cycler, lunar cycler, Mars cycler, orbit insertion, hyperbolic anomaly, escape trajectory, path of totality, shuttle route, path of least resistance, limit cycle.", "27 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 60 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a trajectory, and on what evidence are they told apart?" ], "whatItIsMadeOf": "an abstraction with no physical instance", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "cyclocross track", "trans-lunar injection", "cycler", "lunar cycler", "Mars cycler", "orbit insertion", "hyperbolic anomaly", "escape trajectory", "path of totality", "shuttle route", "path of least resistance", "limit cycle" ] } ], "standing": "Described in 60 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 27 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one trajectory from another, and a trajectory from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a trajectory sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a trajectory from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a trajectory passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a trajectory between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a trajectory, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a trajectory is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What trajectory is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of trajectory are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is trajectory operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of trajectory and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of trajectory?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as trajectory?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a trajectory came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a trajectory and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a trajectory is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a trajectory, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a trajectory, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a trajectory is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 5, "layers": 10, "findings": 12, "questions": 32 } } } }