[4] As of October 21, 2023[update], the catalog listed 58,010 objects, including 16,645 satellites that had been launched into orbit since 1957 of which 8,936 were still active.
[7] Analyst objects are variably tracked and in constant flux, so their catalog and element set data are not published.
As of September 12, 2023[update] ESA estimated there were about 36,500 pieces of orbiting debris that are large enough for USSPACECOM to track.
From 1985 onwards, USSPACECOM was tasked to detect, track, identify, and maintain a catalog of all human-made objects in Earth orbit.
In 2020, Space-Track started to provide data in CCSDS OMM (Orbit Mean-Elements Message) format, which increased the maximum catalog number to 999,999,999.