jpl_horizons

Access precise ephemeris data for solar system objects, including planets, comets, and asteroids, to calculate positions and trajectories for specific time ranges and observation points.

Instructions

JPL Horizons - Solar system objects ephemeris data

Input Schema

Name	Required	Description
`CENTER`	No	Coordinate center (e.g., '500@399' for Earth)
`COMMAND`	Yes	Target object identifier (e.g., '499' for Mars, '1' for Ceres, 'C/2020 F3' for Comet NEOWISE)
`EPHEM_TYPE`	No	Type of ephemeris (OBSERVER, VECTORS, ELEMENTS)
`MAKE_EPHEM`	No	Generate ephemeris
`OBJ_DATA`	No	Include object data
`OUT_UNITS`	No	Output units for vector tables
`QUANTITIES`	No	Observable quantities to include (e.g., 'A' for all, or '1,2,20,23' for specific ones)
`START_TIME`	No	Start time for ephemeris (e.g., '2023-01-01')
`STEP_SIZE`	No	Step size for ephemeris points (e.g., '1d' for daily, '1h' for hourly)
`STOP_TIME`	No	Stop time for ephemeris (e.g., '2023-01-02')
`format`	No	Response format (json, text)

Input Schema (JSON Schema)

{
  "properties": {
    "CENTER": {
      "description": "Coordinate center (e.g., '500@399' for Earth)",
      "type": "string"
    },
    "COMMAND": {
      "description": "Target object identifier (e.g., '499' for Mars, '1' for Ceres, 'C/2020 F3' for Comet NEOWISE)",
      "type": "string"
    },
    "EPHEM_TYPE": {
      "description": "Type of ephemeris (OBSERVER, VECTORS, ELEMENTS)",
      "enum": [
        "OBSERVER",
        "VECTORS",
        "ELEMENTS"
      ],
      "type": "string"
    },
    "MAKE_EPHEM": {
      "description": "Generate ephemeris",
      "enum": [
        "YES",
        "NO"
      ],
      "type": "string"
    },
    "OBJ_DATA": {
      "description": "Include object data",
      "enum": [
        "YES",
        "NO"
      ],
      "type": "string"
    },
    "OUT_UNITS": {
      "description": "Output units for vector tables",
      "enum": [
        "KM-S",
        "AU-D",
        "KM-D"
      ],
      "type": "string"
    },
    "QUANTITIES": {
      "description": "Observable quantities to include (e.g., 'A' for all, or '1,2,20,23' for specific ones)",
      "type": "string"
    },
    "START_TIME": {
      "description": "Start time for ephemeris (e.g., '2023-01-01')",
      "type": "string"
    },
    "STEP_SIZE": {
      "description": "Step size for ephemeris points (e.g., '1d' for daily, '1h' for hourly)",
      "type": "string"
    },
    "STOP_TIME": {
      "description": "Stop time for ephemeris (e.g., '2023-01-02')",
      "type": "string"
    },
    "format": {
      "description": "Response format (json, text)",
      "enum": [
        "json",
        "text"
      ],
      "type": "string"
    }
  },
  "required": [
    "COMMAND"
  ],
  "type": "object"
}

NASA MCP Server

jpl_horizons

Instructions

Input Schema

Input Schema (JSON Schema)

Other Tools from NASA MCP Server

Related Tools

MCP directory API