File:AS08-12-2052 (21879081210).jpg

Apollo 8 Hasselblad image from film magazine 12/D - Lunar Orbit.
This photo was used in Figure 2-59 of the Analysis of Apollo 8 Photography and Visual Observations (SP-201), which has the following caption:

Control point 1.

Text from Analysis of Apollo 8 Photography and Visual Observations referring to this figure is as follows:

For Apollo 8, a target for optical sightings on the lunar far side was called a control point (CP). Three control points were selected before the flight to make sightings easier. The control point identified as CP-1 was located 20° from the evening terminator and CP-2 was located 60° from the evening terminator. The control point identified as CP- 3 was located 60° from the morning terminator. The command module pilot (CMP) exercised an option of selecting sighting targets in real time and selected new targets for CP-1 and CP-2. These control points can be positively identified on Apollo 8 photography (figs. 2-59 and 2-60), and the same points were probably sighted on all three revolutions.

CP-1 was calculated at the time to be at Lat. -6.2537, Long. -158.0650, with a radius of 1742.336 km.
This photo was used in a figure in Lunar Photographs from Apollos 8, 10, and 11 (NASA SP-245), 1971. It has the following caption:

None of the features in this region have been named: however, the keyhole-shaped crater was used for training the Apollo 8 crewmen in landmark tracking. The large crater is approximately 20 statute miles in diameter. Note the range of sizes of craters visible at the low (7°) Sun elevation.