Hohmann transfer delta-v & time API

Returns the two-burn Hohmann transfer between coplanar circular orbits: both delta-v burns, total delta-v, and half-ellipse transfer time. Answers 'Delta-v from LEO to GEO?', 'How long is a Hohmann transfer?'.

Price$0.08per request

MethodPOST

Route/v1/space/hohmann-transfer

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

spaceastronomyhohmanntransfer-orbitdelta-vorbital-mechanicsmission-planningastrodynamics

API URLhttps://x402.hexl.dev/v1/space/hohmann-transfer

Integration docs

Example request

{
  "body": "earth",
  "r1M": 6771000,
  "r2M": 42164000
}

Example response

{
  "body": "earth",
  "mu": 398600441800000,
  "r1M": 6771000,
  "r2M": 42164000,
  "transferSemiMajorAxisM": 24467500,
  "deltaV1Ms": 2399.4679,
  "deltaV2Ms": 1457.221,
  "totalDeltaVMs": 3856.6889,
  "totalDeltaVKms": 3.85669,
  "transferTimeS": 19044.316,
  "transferTimeHours": 5.29009,
  "transferTimeDays": 0.22042,
  "interpretation": "Raising orbit 6771->42164 km costs 3856.7 m/s over 5.29 h."
}

Input schema

{
  "type": "object",
  "required": [
    "r1M",
    "r2M"
  ],
  "properties": {
    "body": {
      "type": "string",
      "examples": [
        "earth"
      ]
    },
    "mu": {
      "type": "number"
    },
    "centralMassKg": {
      "type": "number"
    },
    "r1M": {
      "type": "number",
      "examples": [
        6771000
      ]
    },
    "r2M": {
      "type": "number",
      "examples": [
        42164000
      ]
    }
  }
}

Output schema

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