1. For manned lunar-landing missions, an even larger booster was required.

2. There was experimental work on some Lunar Landing Research Vehicles (LLRV).

3. Gemini's chief designer, Jim Chamberlin, also made detailed plans for cislunar and lunar landing missions in late 1961.

4. Contact with the spacecraft was lost at 07:48 UT at the previously determined point of lunar landing.

5. A 1964 photo shows the Lunar Landing Research Vehicle (LLRV), affectionately dubbed the "flying Bedstead" in flight at Edwards Air Force Base in California

6. Ground tracking of the spacecraft's orbit also allowed controllers to accurately map lunar gravitational anomalies in order to predict trajectories of future lunar missions such as those of the LOK and LK lunar landing vehicles.