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Abstract Amateur contributions to professional publications have increased exponentially
over the last decades in the field of planetary astronomy. Here we review the
different domains of the field in which collaborations between professional and amateur
astronomers are effective and regularly lead to scientific publications.We discuss
the instruments, detectors, software and methodologies typically used by amateur
astronomers to collect the scientific data in the different domains of interest. Amateur
contributions to the monitoring of planets and interplanetary matter, characterization
of asteroids and comets, as well as the determination of the physical properties of
Kuiper Belt Objects and exoplanets are discussed.