openapi: 3.0.1
info:
  title: Space-Track.org REST Authentication Space Object History API
  description: Space-Track.org is the official US Space Command (USSPACECOM) source for space situational awareness data. The REST API provides access to the satellite catalog (SATCAT), orbital element sets (GP/TLEs), conjunction data messages (CDMs), decay predictions (TIP), and space object history. Requires a free account. Authenticate via POST to /ajaxauth/login then use session cookies for subsequent requests.
  version: '1.0'
  contact:
    name: US Space Command / 18th Space Defense Squadron
    url: https://www.space-track.org
servers:
- url: https://www.space-track.org
security:
- sessionCookie: []
tags:
- name: Space Object History
  description: Historical orbital ephemerides
paths:
  /basicspacedata/query/class/gp_history/format/{format}:
    get:
      tags:
      - Space Object History
      operationId: listGPHistory
      summary: List Historical General Perturbation Elements
      description: Returns historical orbital element sets. Contains 138+ million records. Use with caution — apply filters to avoid large downloads.
      parameters:
      - name: format
        in: path
        required: true
        schema:
          type: string
          enum:
          - json
          - xml
          - csv
          - tle
          - 3le
          - kvn
          default: json
      - name: NORAD_CAT_ID
        in: query
        required: true
        description: NORAD catalog number (required to prevent full table scans)
        schema:
          type: string
      - name: EPOCH
        in: query
        description: Epoch date range filter
        schema:
          type: string
      - name: orderby
        in: query
        schema:
          type: string
      - name: limit
        in: query
        schema:
          type: integer
      responses:
        '200':
          description: Historical orbital element records
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/GeneralPerturbations'
        '401':
          description: Unauthorized
components:
  schemas:
    GeneralPerturbations:
      type: object
      description: Orbital element set for a tracked space object
      properties:
        CCSDS_OMM_VERS:
          type: string
        CLASSIFICATION_TYPE:
          type: string
          enum:
          - U
          - S
          - C
          description: Classification type (U=Unclassified)
        NORAD_CAT_ID:
          type: integer
          description: NORAD catalog number
        OBJECT_NAME:
          type: string
          description: Object name
        OBJECT_ID:
          type: string
          description: International designator (YYYY-NNNPPP)
        OBJECT_TYPE:
          type: string
          enum:
          - PAYLOAD
          - ROCKET BODY
          - DEBRIS
          - UNKNOWN
          - TBA - TO BE ASSIGNED
        EPOCH:
          type: string
          format: date-time
          description: Epoch of the orbital elements
        MEAN_MOTION:
          type: number
          description: Revolutions per day
        ECCENTRICITY:
          type: number
          description: Orbital eccentricity
        INCLINATION:
          type: number
          description: Orbital inclination (degrees)
        RA_OF_ASC_NODE:
          type: number
          description: Right ascension of ascending node (degrees)
        ARG_OF_PERICENTER:
          type: number
          description: Argument of perigee (degrees)
        MEAN_ANOMALY:
          type: number
          description: Mean anomaly (degrees)
        EPHEMERIS_TYPE:
          type: integer
        ELEMENT_SET_NO:
          type: integer
        REV_AT_EPOCH:
          type: integer
          description: Revolution number at epoch
        BSTAR:
          type: number
          description: BSTAR drag term
        APOGEE:
          type: number
          description: Apogee altitude (km)
        PERIGEE:
          type: number
          description: Perigee altitude (km)
        PERIOD:
          type: number
          description: Orbital period (minutes)
        COUNTRY_CODE:
          type: string
          description: Owning country code
  securitySchemes:
    sessionCookie:
      type: apiKey
      in: cookie
      name: chocolatechip
      description: Session cookie obtained after successful login via POST /ajaxauth/login