The Pico dos Dias Observatory (Portuguese: Observatório Pico dos Dias (OPD)) is an astronomical observatory owned and operated by the National Astrophysical Laboratory of Brazil (Portuguese: Laboratório Nacional de Astrofísica (LNA)).

It is located in the Brazilian state of Minas Gerais, 37 kilometers (23 mi) from the city of Itajubá.

In April 2017, Russia's space agency, Roscosmos, opened the first Automated Warning System on Hazardous Situations in Outer Space (ASPOS OKP) at Pico dos Dias.

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