sentences:  Satellite Catalog Number
  
  The Satellite Catalog Number (also known as NORAD (North American Aerospace Defense) Catalog Number, NORAD ID, NASA catalog number, USSPACECOM object number or simply catalog number and similar variants) is a sequential five-digit number assigned by USSTRATCOM (United States Strategic Command) in order of discovery to all artificial objects in Earth orbit and space probes launched from Earth.The first catalogued object, catalog number 00001, is the Sputnik 1 launch vehicle, with the Sputnik 1 satellite assigned catalog number 00002.