This was the second attempt to launch a dummy Surveyor lunar lander spacecraft into a barycentric orbit toward a simulated Moon landing. Unlike the previous attempt (in March 1965), this time all systems worked without fault. The Centaur fired flawlessly and put the Surveyor dynamic model on a simulated lunar trajectory so precise that it would have impacted on the Moon without a trajectory correction.
Orbital parameters were 102 x 510,852 miles (164 × 822,135 kilometers) at 28.6 degree inclination. The payload reentered after 31 days.
Siddiqi, Asif A. Beyond Earth: A Chronicle of Deep Space Exploration, 1958-2016. NASA History Program Office, 2018.