Geostationary/synchronous altitude API

Returns the synchronous orbit radius, altitude, and speed where the period matches a body's sidereal rotation (defaults to Earth's sidereal day -> ~35786 km GEO). Answers 'How high is geostationary orbit?', 'Synchronous altitude for Mars?'.

Price$0.04per request

MethodPOST

Route/v1/space/geostationary-orbit

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

spaceastronomygeostationarygeosynchronousgeoorbit-altitudesatelliteastrodynamics

API URLhttps://x402.hexl.dev/v1/space/geostationary-orbit

Integration docs

Example request

{
  "body": "earth"
}

Example response

{
  "body": "earth",
  "mu": 398600441800000,
  "siderealPeriodS": 86164.0905,
  "orbitRadiusM": 42164169.624,
  "orbitRadiusKm": 42164.1696,
  "altitudeKm": 35793.1696,
  "velocityKms": 3.07466,
  "interpretation": "GEO is at 42164 km radius (~35793 km altitude)."
}

Input schema

{
  "type": "object",
  "properties": {
    "body": {
      "type": "string",
      "examples": [
        "earth"
      ]
    },
    "mu": {
      "type": "number"
    },
    "centralMassKg": {
      "type": "number"
    },
    "centralRadiusM": {
      "type": "number"
    },
    "siderealPeriodS": {
      "type": "number",
      "description": "Body's sidereal rotation period (s); required for non-Earth bodies"
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}