- Family: Atlas
- Length: 28.7 m
- Diameter: 3 m
- Launch Mass: 120 T
- Low Earth Orbit Capacity: 1360 kg
The Atlas LV-3B was manufactured by National Aeronautics and Space Administration with the first launch on 1960-07-29. Atlas LV-3B has 7 successful launches and 3 failed launches with a total of 10 launches. The Atlas LV-3B, Atlas D Mercury Launch Vehicle or Mercury-Atlas Launch Vehicle, was a human-rated expendable launch system used as part of the United States Project Mercury to send astronauts into low Earth orbit. Manufactured by American aircraft manufacturing company Convair, it was derived from the SM-65D Atlas missile, and was a member of the Atlas family of rockets.