Orión was the designation of a sounding rocket of Argentina, which was started between 1965 and 1971 at CELPA, Mar Chiquita, Tartagal and Wallops Island. Developed by the Instituto de Investigaciones Aeronauticas y Espaciales (IIAE), it marked Argentina's entry into the club of space-faring nations.
The Orión-2 had a gross takeoff mass of 100 kg (220 lb) and could carry a 25-kilogram (55 lb) payload. Its dimensions were 3.77 m (12.4 ft) in length and 0.21 m (8.3 in) in diameter. It could reach a ceiling of 160 km (99 mi). The first version Orión-1 was flown twice in 1965 and 1966 in order to test the engines and technologies; with a length of 3.00 m (9.84 ft) it was limited to a 10-kilogram (22 lb) payload. The production version Orión-2 was launched 22 times from 1966 to 1971.