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NASA Exoplanets Equilibrium Temperature Calculator
x402
NASA Exoplanets Equilibrium Temperature Calculator is a paid API for AI agents from exoplanets-nasa.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Calculates a planet's equilibrium temperature in Kelvin, Celsius, and Fahrenheit from orbital parameters and stellar properties
Price / call$0.02
Success—
StatusUnknown
How this service works
Planet equilibrium temperature in K, C and F from star luminosity or temperature and radius, orbit distance and albedo.
Output
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.
Example use cases
Habitable zone temperature check
“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?”
Red dwarf planet temperature estimate
“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.”
Earth analog temperature validation
“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.”
Technical details
Endpoint
GEThttps://exoplanets-nasa.x402tookit.com/equilibrium-temperature?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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