List of Thor-Agena launches

Thor DM-18 Agena or just Thor-Agena was a series of orbital launch vehicles.

The launch vehicles used the Douglas-built Thor first stage and the Lockheed-built Agena second stages.

They are thus cousins of the more-famous Thor-Delta, which founded the Delta launch vehicle family.

The first attempted launch of a Thor-Agena was on 28 February 1959.

It was the first two-stage rocket to place a satellite into orbit.

A Thor-Agena launch vehicle , ready to launch the Discoverer 37 ( KH-3 ) spacecraft, on 13 January 1962