jpl_horizons_file

Access ephemeris data for solar system objects using JPL Horizons. Input target object, time range, and parameters to generate precise positional data in JSON or text format.

Instructions

JPL Horizons - Solar system objects ephemeris data (File Input)

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_file

Instructions

Input Schema

Input Schema (JSON Schema)

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MCP directory API