Flying westward over the center of the Moon’s far side in an equatorial orbit (orbit 22), the Apollo 10 crew photographed the ground track below them in a vertical sequence showing the lunar equator from terminator to terminator.
This extraordinary panorama was taken with the 80mm lens from an altitude of about 60 nautical miles. The width of the area photographed is approximately 65 km. The 87-km Crater Vening Meinesz is on the right.
Vening Meinesz is a lunar impact crater. This is an eroded feature with multiple small craterlets along the rim. As a result, the structure has been worn down and the rim edge is no longer well-defined. The largest of the impacts overlying this crater is a small crater along the bottom edge of the northern inner wall. The remainder of the interior floor is relatively level with a central peak. Attached to the northwest outer rim is the satellite crater Vening Meinesz W, and attached along the northeast is Vening Meinesz C. The panorama covers the lunar farside equator between longitudes 163.7° E to the east (right) and 154.4°E to the west (left).
From the mission transcript when the panorama was taken (at about T+119:47:15 after launch):
119:22:07 Public Affairs Officer (Mission Control):
This is Apollo Control. We have had Loss Of Signal as Apollo 10 went around the corner, the back side of the Moon on revolution 22. [...] They were also given times for vertical stereo strip photography coming up this next revolution; the terminator to terminator strip photography taken with the camera pointing vertically to the lunar surface beginning at 65 - running between 65 east longitude and 34 degrees east longitude, pointing the camera somewhat north of the track to include Landing Site 1.[...]
OK. Now when we first start - near the terminator we’re going back to what they gave us on this card, f:4 and 250 [garble] As it gets lighter, we’ll go to f:4 at [garble]. [...]
I tell you, the thing changes color depending on the Sun’s - Sun - probably Sun elevation. 42:46, got about 30 seconds to go.
Coming up on the [garble].
OK. I [garble].
1. 2, go. I can’t get over how round this thing is. It isn’t very big, but it’s round. [...]
11 minutes. OK. Gene-o. It’s starting to get pretty light. I’ll say we should be 25 - f:4 at 250[th] on the black and white. OK? Got it? [...]
If we had another Hasselblad, we could be taking right out that window [garble]. [Cernan is still annoyed at the failure of the Hasselblad camera used in the LM.]
OK, for the rest of the pass, until we get over near the other terminator, [garble] zero phase [garble] we go to f:5.6 on the black and white. [...]
225 right there. There’s CP-1.
Crater 225 is today known as Coriolis. CP-1 is Control Point No.1.]
You got it? [Garble] Yes. Look [garble] crater with that big peak in it? Yes.
[Garble] this is 303. [Crater 303 is today known as Vening Meinesz.]