Atlas LV-3 Agena B – United States Air Force
- Family: Atlas
- Length: 20.27 m
- Diameter: 3.05 m
- Launch Mass: 130 T
The Atlas LV-3 Agena B, manufactured by United States Air Force established in 1947, undertook its inaugural launch on 01/31/1961. Notably, Atlas LV-3 Agena B has 21 successful launches and 8 failed attempts, with a cumulative tally of 29 launches, currently with 0 pending launches in the pipeline.
The Atlas LV-3A was a largely unsuccessful configuration until it was given an Agena B upper stage. It was responsible for the launch of Mariner II to Venus and had one of the first engines that could be restarted in orbit.