{"uid":"cap_e_s3QRI6xgrIh0oUUj5J8","slug":"561-group-astronomy-positions-37d7f593","name":"561 Group Astronomy Positions","description":"Apparent geocentric ecliptic longitude, latitude and angular speed with lunar illumination, computation provenance and measured error bounds.","url":"https://market.561.group/v1/astronomy/positions/2026-07-21T00:00:00Z?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","required":["date"],"properties":{"date":{"type":"string","description":"Exact ISO-8601 UTC date or instant, e.g. 2026-07-21T00:00:00Z."}}},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["tier","time","frame","bodies","lunarPhase","provenance","accuracy"],"properties":{"tier":{"const":"astronomy-positions"},"time":{"type":"string"},"frame":{"type":"string"},"bodies":{"type":"object"},"accuracy":{"type":"object"},"lunarPhase":{"type":"object"},"provenance":{"type":"object"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.04","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.04/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_0nRs5cMtCPg0PPekS-jzX","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.04","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns apparent geocentric ecliptic longitude, latitude, and angular speed for celestial bodies at a given UTC instant, with lunar illumination, computation provenance, and error bounds.","exampleAgentPrompt":"What are the apparent geocentric ecliptic longitude, latitude, and angular speed for the main celestial bodies on July 21, 2026 at midnight UTC, including lunar illumination and error bounds?","exampleUseCases":[{"title":"Astrological chart computation","prompt":"Can you get the geocentric ecliptic positions of all major bodies for January 15, 2025 at 00:00:00 UTC, including their angular speeds and how bright the moon is?"},{"title":"Lunar phase lookup for event planning","prompt":"What's the lunar illumination and phase on March 20, 2026 at midnight UTC? I want to know how much moonlight there'll be and the moon's ecliptic coordinates."},{"title":"Astronomical accuracy audit","prompt":"Pull the apparent ecliptic longitude, latitude, and angular speed data for celestial bodies on December 1, 2024 at 00:00:00 UTC and include the computation provenance and measured error bounds so I can verify the accuracy."}],"resultDescription":"A JSON object containing the reference frame, timestamp, per-body ecliptic longitude/latitude/angular-speed measurements, lunar phase details (including illumination percentage), computation provenance metadata, and accuracy/error bound information for the requested instant.","failureModes":["Invalid or malformed ISO-8601 date returns a 400 error","Date out of supported ephemeris range returns an error","Missing required path parameter 'date' causes a validation failure","Payment failure or insufficient USDC balance blocks the request (x402)","Network timeout for computation-heavy instants"],"whenToPreferThis":"Choose this endpoint when you need precise, geocentric ecliptic coordinates (longitude, latitude, angular speed) for celestial bodies at a specific UTC instant, especially when computation provenance and formal error bounds are required for scientific or astrological rigor. Prefer it over generic ephemeris APIs when you also need lunar illumination data and traceable accuracy metadata bundled in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:40:45.580Z","isFirstParty":false,"canonicalSlug":"561-group-astronomy-positions-37d7f593"}