This Recommended Standard for Conjunction Data Message (CDM) specifies a standard message format for use in exchanging spacecraft conjunction information between data originators of conjunction assessments, satellite owner/operators, and other authorized parties. Such exchanges are used to inform satellite operator(s) of conjunctions between objects in space to enable consistent warning by different organizations employing diverse conjunction assessment techniques.

The current version of this document contains all updates through technical corrigendum 2, dated October 2021.