The Castor A was an Argentine sounding rocket designed in 1969 by the Instituto de Investigaciones Aeronáuticas y Espaciales (IIAE).
The rocket featured a two-stage configuration, utilizing five Canopus II rockets (four in the first stage and one in the second). It was capable of placing a 75 kg (165 lb) payload at a 400 km altitude.
Throughout its operational lifespan, the Castor A was launched seven times. Experiencing one failed launch, it had a success rate of approximately 83.3%.
Castor was launched seven times: