{"uid":"cap_4VLtsHJ4v1kmhz9oPAMbK","slug":"nasa-exoplanets-equilibrium-temperature-calculator-253baaf2","name":"NASA Exoplanets Equilibrium Temperature Calculator","description":"Planet equilibrium temperature in K, C and F from star luminosity or temperature and radius, orbit distance and albedo.","url":"https://exoplanets-nasa.x402tookit.com/equilibrium-temperature?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"],"type":"string"},"queryParams":{"type":"object","required":["orbitAu"],"properties":{"teffK":{"type":"number","description":"Star effective temperature in K (with radiusSolar)"},"albedo":{"type":"number","description":"Bond albedo 0 to 0.95 (default 0; Earth is about 0.3)"},"orbitAu":{"type":"number","description":"Semi-major axis in AU, 0.001 to 1000"},"radiusSolar":{"type":"number","description":"Star radius in solar radii (with teffK)"},"luminositySolar":{"type":"number","description":"Star luminosity in solar units (give this, or teffK with radiusSolar)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"albedo":{"type":["null","number"]},"source":{"type":["null","string"]},"orbitAu":{"type":["null","number"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"zeroAlbedoK":{"type":["null","number"]},"equilibriumC":{"type":["null","number"]},"equilibriumF":{"type":["null","number"]},"equilibriumK":{"type":["null","number"]},"insolationEarth":{"type":["null","number"]},"luminositySolar":{"type":["null","number"]},"luminosityDerivedFromTeffAndRadius":{"type":["boolean","null"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yaKm57bOteH7Vn_dYkCcg","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates a planet's equilibrium temperature in Kelvin, Celsius, and Fahrenheit from orbital parameters and stellar properties","exampleAgentPrompt":"What's the equilibrium temperature in Kelvin, Celsius, and Fahrenheit for a planet orbiting at 1 AU from a star with luminosity 1.0 solar units, assuming a Bond albedo of 0.3?","exampleUseCases":[{"title":"Habitable zone temperature check","prompt":"I have an exoplanet candidate orbiting at 0.72 AU from a star with luminosity 0.7 solar units and albedo 0.3 — what's its equilibrium temperature in Kelvin and Celsius?"},{"title":"Red dwarf planet temperature estimate","prompt":"Calculate the equilibrium temperature for a planet at 0.1 AU from a red dwarf star with effective temperature 3500 K and radius 0.35 solar radii, assuming zero albedo."},{"title":"Earth analog temperature validation","prompt":"What equilibrium temperature in K, C, and F do I get for an Earth-like planet at 1 AU with albedo 0.3 around a star with luminosity 1 solar unit? I want to see if it matches Earth's known value."}],"resultDescription":"Returns equilibrium temperature in Kelvin, Celsius, and Fahrenheit; zero-albedo temperature in Kelvin; insolation relative to Earth; derived or provided luminosity in solar units; a summary string; and metadata including albedo used, orbit in AU, data source, and any warnings or reasons.","failureModes":["Missing required orbitAu parameter returns an error","orbitAu outside range 0.001–1000 AU may be rejected","Providing neither luminositySolar nor both teffK+radiusSolar returns an error — one of these combinations is required","albedo outside 0–0.95 may produce a validation error","Conflicting stellar inputs (all three of luminositySolar, teffK, radiusSolar) may yield unexpected behavior"],"whenToPreferThis":"Use this endpoint when you need a quick, physics-based planetary equilibrium temperature calculation from stellar and orbital parameters without running a full climate model. Ideal for screening exoplanet habitability, comparing candidate planets, or enriching planet datasets with thermal estimates. It supports both luminosity-direct and temperature+radius inputs, making it flexible for catalog data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:08:21.558Z","isFirstParty":false,"canonicalSlug":"nasa-exoplanets-equilibrium-temperature-calculator-253baaf2"}