The bundle of numbers above is called a TLE (Two-Line Element Set). A TLE is a two line file containing mostly orbit element data that computers read to enable the orbit propagation necessary to generate ephemerides for the satellite in question.
Scroll over or click on a number (highlighted by its colour) to determine what each of these numbers mean.
Sometimes, this file can be called the "Three-Line Element Set". In this case, there is a "Line 0" in which normally reserved for the common name of the satellite. This assists the user in cross-referencing the NASA catalogue number with the satellite's common name. Some orbit propagating software (like TheSky, by Software Bisque) requires the use of Three-Line Element Sets to work properly with the orbit element data. Many propagators take little or no notice of this line and can use two and three-line elements sets interchangeably.
TLEs Was Last Modified On May 23, 2010