Spacelog Apollo 11

We're moving the camera over to the right window now to give you Langrenus, its—its several central peaks and -

Roger. We got Langrenus in our screen now.

Okay, 11. This is Houston. We're getting a beautiful picture of Langrenus now with its rather conspicuous central peak.

The Sea of Fertility doesn't look very fertile to me. I don't know who named it.

Well, it may have been named by a gentleman whom this crater was named after, Langrenus. Langrenus was a cartographer to the King of Spain and made one of the—one of the early reasonably accurate maps of the Moon.

Roger. That's very interesting —

… at least it sounds better for our purposes than the Sea of Crises.

Amen to that.

Okay. It looks like you're coming inside now on the camera.

Well, I can't get behind to see the monitor. I'll bring the focus in, but we're going to be looking down past one of the LM quads and one of the antennas almost straight down at the ground track that we'll be seeing coming in now. I guess there's maybe 2 or 3 minutes before power descent.

All right, that should put the LM structure about in focus, and I'm going to move it out to infinity and then expand the field of view.

Crater Secchi is out my window now, window number 2.

Hello, Apollo 11. This is Houston. We show you coming up on the terminator at 78 53, about 7 minutes from now, and we've also got the LOI 2 and TEI 5 PAD's ready for you after the TV whenever you want to terminate. Over.

Roger.

Roger. I think we can make them out. The color really enhances our ability to discern features and craters over what we see in real time on our black and white monitor.

Right. The—At these low Sun angles, there's no trace of brown, it's now returned to a very gray appearance and, like the 8 crew says, it has a look of plaster of paris to it at this Sun angle, which is completely lacking in …

Roger.

Okay. This is very close to ignition point for power descent. Just passing Mount Marilyn that—that triangular shaped mountain that you see in the center of the screen at the present time with crater Secchi Theta on top of the far northern edge of the mountain.

Roger. We're getting a good view of Mount Marilyn and the Secchi Theta.

And now we're looking at what we call Boot Hill; occurs 20 seconds into the descent.

The bright, sharp rimmed crater at the very right edge of the screen, Censorinus T. Now passing the—the 1 minute point in power descent.

Roger. And for your information, your current altitude is 148 nautical miles above the surface.

Don't you think?

I'm unable to determine altitude at all looking out the window. I couldn't tell whether we were down at 60 or up at 170.

I bet you could tell if you were down at 50,000 feet.

I wouldn't be surprised.

We're passing some steep ridges here. The edge of some old craters that were photographed by Apollo 10; and those—the crew of Apollo 10 was very impressed with the steepness of these ridges when they came over them at about 50,000 feet.

Roger. We can observe they're also steep even from this altitude. You got quite a shadow being cast by the Sun at these low angles.

The entire surface is getting considerably darker than the surface that we looked at previously when the Sun was quite high above us. The crater in the—bright crater in the center of the screen,—well, the smaller one is Censorinus.

Roger. And we show you low over 1 minute from the terminator at the present time.

How's the brightness of the picture you're receiving? You think we ought to open f stop some as we approach the terminator?

Yes. The brightness is still doing quite well. You can go ahead and open it up a stop or two. The automatic light level compensation seems to be working beautifully.

There's a good picture of Boot Hill.

Roger. We're —

Three minutes and 15 seconds into the descent.

Roger. We're seeing Boot Hill now.

The next crater coming into the bottom, that's Duke Island right there, and to the left, the crater—the largest of the craters near the center of the picture right now is Maskelyne W. This is a position check during descent at about 3 minutes and 39 seconds, and it's our down range position check and cross range position check prior to yawing over face up to acquire the landing radar. Past this point, we would be unable to see the surface below us until getting very near the landing area.

Roger. I imagine you'll get a—you'll get a real good look at that tomorrow afternoon.

Sinuous Rille is the one that was referred to in Apollo 10 as Sidewinder.

That's a good name, too: Sidewinder and Diamondback. It looks like a couple of snakes down there in a lake bed.

And we're approaching the terminator now. See the —

Roger.

Contrast has increased and only the sunlit side of these ridges remain illuminated, while the dark sides and the shadow will become completely black.

11, this is Houston. The picture's getting a little grainy now. You might go ahead and open up the f stop.

Landing point is just barely in the darkness. That one crater, the upper part of which you see, lower part completely in darkness. The small, well defined crater is Moltke, which is about abeam of the landing sight.

Roger. We can just see; it looks like a little less than half of its rim right now.