Atlas Agena B
USA Official site 
Built & Operated By
United States Air Force
Government · founded 1947
Family
Atlas
variant LV-3 Agena B
Maiden Flight
31 JAN 1961
About
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.
Vehicle Specifications
Height
20.27 m
Diameter
3.05 m
Launch Mass
130 T
Thrust
363 kN
Configuration
Expendable
Launch Record
Total Launches
29
Successful
21
Failed
8
Consecutive
6
Performance
Launch Cost
$14.2M