The Éridan is a two-stage French sounding rocket, which results from the use of the Stromboli engine (also used on the Dragon and Dauphin) for the first and second stages.

[1][2] It belonged to a family of solid-propellant rockets that also encompasses the Belier, the Centaure, the Dragon, and the Dauphin.

[2][5] An improved version called Éridan II was planned in 1971 but it never materialized due to the project being cancelled in 1973.

[2] The first flight from Kourou on 26 September 1968 failed,[2] but was followed by twelve successful launches that took the rocket to altitudes of 196 to 420 km between 12 April 1969 and 14 November 1979.

[5] Two Éridan were launched in January and February 1975 off the Kerguelen Islands for magnetosphere studies.