- Family: Thor
- Length: 27.2 m
- Diameter: 2.44 m
- Launch Mass: 56 T
- Low Earth Orbit Capacity: 400 kg
The Thor SLV-2 Agena B was manufactured by McDonnell Douglas with the first launch on 1964-01-25. Thor SLV-2 Agena B has 3 successful launches and 0 failed launches with a total of 3 launches. Thor-Agena was a series of orbital launch vehicles. The rockets used Thor first stages and Agena second stages. They are thus cousins of the more-famous Thor-Deltas, which founded the Delta rocket family.