Spacelog Apollo 8

Negative.

Houston, we haven't started 23 yet. Our CAL is zero.

Roger. Understand. Thank you.

We are in the process now to—to go to P23 attitude.

Apollo 8, Houston.

Go ahead, Houston. Apollo 8.

Roger. Downlink data shows that on star 33, Jim is using the lunar far horizon when he should be using the lunar near horizon. Over.

Okay. Thank you. 220?

Roger. 220.

Let us check it.

Roger.

You want the far horizon now, Houston?

Roger. Far horizon.

We have far horizon in now, Mike, on 220. I will check again, though.

Yes. That is right. We are requesting the lunar near horizon as per the flight plan, the lunar near horizon. We show that you are using the lunar far horizon.

Okay. Roger. I thought that you had copied up 220 to me. I will put it in the near horizon.

Houston, Apollo 8. Over.

Apollo 8, Houston. Go ahead.

Mike, it's getting kind of damp—we're getting a playback, Mike. It is getting kind of damp in here. It might be a good idea to go back into AUTO on the temp in—the glycol temp in for awhile to try and get some of this moisture out of the cabin.

Roger. Stand by, Bill.

Roger.

Apollo 8, Houston.

Go ahead.

We concur. We would like you to go back to AUTO on the glycol temp inlet valve. Over.

Okay. When was our lowest radiator OUT TEMP during the last couple of hours while we have been in MANUAL?

I will get it for you.

And we are back in AUTO.

Roger. Back in AUTO, and 29 degrees is as low as we've seen.

Okay. We are showing a CABIN TEMP of about 76. It is very comfortable, but we are getting a lot of condensation on the walls now.

Houston, Apollo 8.

Apollo 8, this is Houston.

Roger, Mike. While we are waiting for the spacecraft to maneuver to the moon, I might note that as we get closer to the moon, the light from the sun comes right into the scanning telescope, and it is impossible to use. You have to rely on the sextant alone.

Roger, Jim. Understand that light from the sun is coming into the scanning telescope making it impossible to see, and you have to rely on the sextant alone. Can you attach any angle to that?

Well, Mike, I am right now at the substellar point of 33. I don't know where the sun is exactly from there, but that is about the angle. We're—the optics are pointed right at the moon now.

Apollo 8, Houston. We are going to be changing our antenna in a couple of minutes. You can expect a COMM switch-over.

Houston, Apollo 8. Over.

Apollo 8, Houston. Go.

Roger. The LMP is going to take a little snooze here for a while. I am wondering, can you give me a quick—your view of the system status here before I depart, and, also, give me an idea of when the next cryo stir is due?

Roger, Bill. Will do; stand by.

Apollo 8, Houston.

We agree. Star 34 lunar far horizon for one set.

Houston, the cryos have been stirred, and could you also give me a quick rundown on how the SPS line temps are doing?

Roger, Bill. Understand you stirred the cryos. Last time we checked, the SPS line temps were excellent; they were nice and warm. We will give you another number right now.

And a PU valve.

Apollo 8, Houston.

Go ahead.

Roger. On your SPS system, your oxidizer is running 75 degrees, fuel 74 degrees, and PU valve between 78 and 82 depending on where we measured it. Over.

Real good. Everything really is working fine, isn't it?

Yes, it's really humming along, Bill.

Okay. See you later.

Houston, Apollo 8.

Apollo 8, this is Houston.

I understand you want two sets on number 40, lunar near horizon. Is that right?

Apollo 8, Houston.

Go ahead, Houston.

Roger. We missed your last trunnion angle, Frank.

21450.

Roger. 21450, and Paul tells me Valerie is over here and wishes Bill a happy nap.

Okay. Thank you. Tell her that he makes us tired sometimes too, will you?

Roger. I will deliver a modified version of the message.

Thank you.

Apollo 8, Houston.

Go ahead, Houston.

Roger. On star number 40 that you are doing now, the flight plan only calls for one set of marks. You called down two sets, and it's really your choice. Only one is required. We are glad to have the data if you do a second set. Over.

We will only do one then, if you want to. Our flight plan has been updated to include two sets. That is why I called it down.

Apollo 8, Houston. We missed the last trunnion.

Very well, I will read it to you; 21455.

21455. Thank you. Just a matter of interest: it is taking your voice about 1.6 seconds to get down to us.

I'm a little hoarse, that's why.

Okay. Houston, do you want us to go back to the PTC attitude now and start the rotisserie again?

That is affirmative, Frank. We will have the PTC attitude for you in just a second here.

Apollo 8, Houston.

Go ahead.

Roger. Those PTC attitudes remain pitch 224 degrees, yaw 020 degrees. On the next page, page 239 of your flight plan, those PTC numbers should be changed to reflect that.

Pitch 224 and yaw 20.