Spacelog Apollo 8

Apollo 8, Houston. Roger. The burn on time, burn time of 4:06.5, VG_X is minus 1.4.

Apollo 8, Houston. Verify your EVAP water control on panel 382 is AUTO. Your EVAP OUT temperature is high. Over.

Roger. Standing by.

Houston, Apollo 8. Roger. Primary EVAP is AUTO, H₂ flow AUTO. Do you recommend activating the secondary water boiler?

Roger. Copy. Stand by.

Apollo 8, this is Houston. Reverify manual valve on panel 382, evaporator water control AUTOMATIC. Over.

Roger. Verified.

Apollo 8, this is Houston. Recommend you activate your secondary water evaporator.

Secondary EVAP coming on line.

Roger.

Apollo 8, Houston. Turn off your DSE, and we will go to high bit rate. Over.

Roger.

Apollo 8, this is Houston. And I will continue my readback of the burn status report. Copied VG_X zero, VG_Y zero, VG_Z 1.2, DELTA-V Charlie minus 20.2. Over.

Stand by; he's getting the chart out again.

DELTA-VG_Z was 0.2.

Roger. Understand; 0.2 on VG_Z.

Houston, this is Apollo 8. We are on malfunction 1 of 6, going through step 1 to step 2. Over.

Apollo 8, Houston. Roger. Copy.

Correction. That is to step 4.

Roger. Copy; to step 4.

Now to step 13.

Roger. Step 13.

Now to step 14.

Houston. Roger.

Looks like the boiler dried out somewhere along the line.

Roger, Bill.

Houston, this is Apollo 8. I would like to confirm that burn status report. VG_X was minus 1.4, VG_Y 0. VG_Z 0.2, minus 0.2 that is. DELTA-V_C was minus 20.2 -

Apollo 8, —

— apogee 169.1, perigee 60.5.

Apollo 8, this is Houston. Roger. I will read back again. The burn was on time, 4 minutes and 6-1/2 seconds, VG_X minus 1.4, trim nominal, VG_Y zero, VG_Z minus 0.2, DELTA-V Charlie minus 20.2. Over.

That's Roger.

Roger. And we copy your apogee and perigee.

Steam pressure is coming up.

Roger, Bill.

Step 15.

Roger. Concur.

Very good.

EVAP TEMP's coming down.

Apollo 8, Houston. Roger. We concur.

Okay. Houston, keep a good eye on it.

Roger. We're watching.

Okay. Nice job on the malfunction procedures.

Roger, Bill. Thanks.

You, too.

Give us a call when you think we ought to stop the secondary boiler, Houston.

Apollo 8, Houston. Wilco.

Houston, Apollo 8.

Apollo 8, Houston. Go.

Roger. For information, we're passing over just to the side of the crater Langrenus at this time going into the Sea of Fertility.

Apollo 8, Houston. Roger.

Apollo 8, Houston. What does the ole moon look like from 60 miles? Over.

Okay, Houston. The moon is essentially gray, no color; looks like plaster of Paris or sort of a grayish deep sand. We can see quite a bit of detail. The Sea of Fertility doesn't stand out as well here as it does back on earth. There's not as much contrast between that and the surrounding craters. The craters are all rounded off. There's quite a few of them; some of them are newer. Many of them look like—especially the round ones—look like hits by meteorites or projectiles of some sort. Langrenus is quite a huge crater; it's got a central cone to it. The walls of the crater are terraced, about six or seven different terraces on the way down.

Roger. Understand.

And coming up now, the Sea of Fertility are the old friends Messier and Pickering that I looked about so much on earth.

Roger.

And I can see the rays coming out of blaze Pickering. We're coming up now near our P-1 initial site which I'm going to try and see. Be advised the round window, the hatch window, is completely iced over; we can't use it; Bill and I are sharing the rendezvous window.

Apollo 8, Houston. Roger. Got any more information on those rays? Over.

Roger. The rays out of Pickering are quite faint from here; there are two different groups going to the left. They don't appear to have any depth to them at all, just rays coming out.

Roger.

They look like just changes in the color of the mare.

Bill, if you can tear yourself away from that window, we'd like you to turn off the secondary evaporator. Over.

Roger. Going OFF.

Apollo 8, this is Houston. You can leave that secondary pump on for just a few minutes. Over.

Stand by.

Roger.

Okay. Over to my right are the Pyrenees Mountains coming up, and we're just about over Messier and Pickering right now. Our first initial point is easily seen from our altitude. We're getting quite a bit of contrast as we appear—as we approach the terminator. The view appears to be good, no reflection of the sun back to our eyes; it appears that visibility at this particular spot is excellent. It's very easy to pick out our first initial point; and over this mountain chain, we can see the second initial point, the Triangular Mountain.

And we're coming upon the craters Colombo and Gutenberg. Very good detail visible. We can see the long parallel faults or grabens, and they run through the Mare material right into the highland material.

We're directly over our first initial point now for P-1. It's almost impossible to miss, very easy to pick out, and we can look right over into the second initial point.

Roger, Jim.

I can see very clearly the five crater star formation which we had on our lunar chart —

Roger.

— And right now, I'm trying to pick out visually P-1.

Roger, Jim. Bill, you can turn off the secondary EVAP pump now.

Houston, this is Apollo 8.

Apollo 8, Houston. Go.

Roger. How about giving us a system status, please?

Roger.

Okay. I've got P-1 in sight now, Houston.

Roger, Jim.

It's very easy to spot. You can see the entire rims of the craters from here with, of course, the white crescent on the far side where the sun is shining on it. The shadows are quite lengthy now. Maskelyne B (Marsh of Sleep) has quite a few shadows off of it, but it can be recognized. Just west of the Maskelyne B, we start going to the terminator. The terminator is actually quite sharp over the Pyrenees, and it's—I can't see anything in earthshine at this present time. Bill says that he can see things out the side window when he's not looking down on the sunshine on the moon.

Apollo 8, this is Houston. All systems are GO. We're evaluating the strip charts on your SPS burn, and we'll give you a readout on that shortly. Over.

Roger. Thank you. It seemed smooth. Do you need high bit rate any more?

Roger. We'd like high bit rate. We have dumped your DSE, and we'd like to stick with high bit rate for a while.

Roger.

Well, we're just about over Maskelyne B (Marsh Of Sleep) now, and our target is just directly below us.