GCAT: General Catalog of Artificial Space Objects

Jonathan C. McDowell

Object Catalogs

GCAT Release 1.3.0 (2022 Sep 25) | Data Update 2022 Sep 25

Geostationary Orbit Catalog Column Descriptions


The GEO catalog lists objects in or near geosynchronous orbit.



Objects are entered in the GEO catalog if at any time in their careers their orbital period is in the near-geosynchronous ring (NGEO) between 23 hours (1380 min) and 25 hours (1500 min).


The file gives latest available orbital information. Fields are:



Note that an object may be in the list because its orbit code was transiently one of the GEO/ ones for a early phase of the mission - an example is the CAPSTONE probe.