In-orbit fragmentation

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An in-orbit fragmentation (also known as an on-orbit fragmentation) is an event in which an orbiting human-made object releases one or more fragments (space debris) into the space environment without that release being part of its intended mission. Fragmentation events may result from accidental or intentional collisions, explosions caused by residual propellants or pressurized systems, structural failures, or other physical break-ups. According to NASA, in-orbit fragmentation events have generated approximately half of all tracked artificial objects in Earth orbit. The objects produced by these events contribute significantly to the orbital debris population. As a result, fragmentation debris represents one of the principal challenges for space traffic management, which seeks to ensure the safe and sustainable operation of spacecraft through activities such as space object tracking, conjunction assessment, and collision avoidance. As the debris environment becomes more congested, successive collisions may generate additional fragments in a self-sustaining process known as the Kessler syndrome. As Earth orbit is a finite resource, limiting the generation of space debris through the prevention of in-orbit fragmentations is a key objective of international space debris mitigation efforts. This objective is reflected in the United Nations Committee on the Peaceful Uses of Outer Space's guidelines for the long-term sustainability of outer space activities and other international debris mitigation guidelines.