- Mike Collins (CAPCOM)
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Righto. And we're looking at your pitch CDU readout down here and looks to us like you are about 25 degrees off the 180 for your PTC, and we were just wondering how come?
- Jim Lovell (CMP)
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We've been looking at that, too. It keeps wandering off in pitch for some reason more than yaw. I was just about ready to go back to it again. I had to go back one time, and I was just seeing how far she would drift. I thought it would drift out a ways and come back by itself, but it is not doing it.
- Frank Borman (CDR)
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Houston, Apollo 8. We're in the process of doing the trunnion bias check; then we will go to P23.
- Frank Borman (CDR)
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Okay. I was just checking. I just wanted to know how our thermal control was going before we left.
- Mike Collins (CAPCOM)
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Your temperatures are looking good, Frank. There is still a differential temperature between quads, but nothing that would cause us in the slightest to worry about doing P23.
- Mike Collins (CAPCOM)
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Roger, Jim. We've been looking at these stars that we gave you this time for P23. It looks like the second star, number 11, has a trunnion angle right out to the limit, about 49.7 degrees. And we're thinking it might be a good idea to switch you over to star 1, which has a much smaller trunnion angle. What do you think? Star 1 is Alpheratz.
- Mike Collins (CAPCOM)
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Okay. That will be then in place of star 11, star 1, and in place of lunar far horizon, lunar near horizon; and it remains two sets. Over.
- Mike Collins (CAPCOM)
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Roger. Fine. Old golden fingers there is getting so swift we missed some marks on the downlink. I wonder—if you hand recorded them, could you read us your three marks—trunnion angles, your three trunnion angles on star 2 and the last four trunnion angles on star 1. Over.
- Mike Collins (CAPCOM)
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Stand by. We're not reading you good enough, so we'll wait until you get a better OMNI.
- Frank Borman (CDR)
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Okay. Star 2 trunnion angle, first one 05245, second one 05243, next one 05241; last 4 trunnion angles 04133, 04133, 04132, 04132.
- Frank Borman (CDR)
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Can you give me some idea on the updates from the midcourse that we might need, and all that good stuff, Mike?
- Mike Collins (CAPCOM)
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Okay. We're predicting at the nominal time of your next midcourse, which is entry interface minus 2 hours—we're predicting 1.4 foot per second burn which changes your gamma at entry interface by a tenth of a degree. Right now with no further maneuvers, your gamma is minus 6.39 degrees, and we're going to steepen it up very slightly to hit the center of the target line, and it will be after the maneuver minus 6.51. Over.
- Frank Borman (CDR)
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No. I just wondered—we hadn't heard whether we were going to do it or not and so on.
- Mike Collins (CAPCOM)
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Yes. We'll be sending the PAD data up to you in about another 2 hours, Frank; about 132 hours GET.
- Frank Borman (CDR)
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Okay. We—this will be the last set of star sightings we do now nominally, and even if we lose COMM, we'll just come on in with what we got.
- Frank Borman (CDR)
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Incidentally, that COMM has been fantastic. I don't know how you've heard us, but boy, it's just like you are next door even in lunar distances.
- Mike Collins (CAPCOM)
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Yes. It has really been great with rare exceptions when you are on a bad OMNI right before you switch. Then we get an awful lot of background noise, but in general, it has been excellent, and boy, we are really thankful for it because reading all these updates would be bad news with bad COMM, as you know.
- Frank Borman (CDR)
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As usual, we are all a little pooped. I've got Bill sleeping now, and then Jim and I will swap just as soon as we get through with these stars.
- Mike Collins (CAPCOM)
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Roger, Frank. If you get a chance to, we'd like for you to read us down your trunnion calibration number. We missed that one on the downlink, and we have an update for your passive thermal control attitude.
- Mike Collins (CAPCOM)
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Roger. Thank you, and on page 2-104 the PTC attitudes should read zero pitch and 45 degrees yaw. Over.
- Mike Collins (CAPCOM)
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Roger. And we'd like some PRD readings for those of you who are up and around.
- Mike Collins (CAPCOM)
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Roger. You're loud and clear, Jim. We'd like to get your PRD reading while we've got you up and a flight plan change we're suggesting on page 2-107 when you're ready to copy.
- Mike Collins (CAPCOM)
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Okay, Jim. On page 2-107, we're recommending that you delete that P52 and just-stay in PTC attitude. Your platform is real good, and we don't feel that alignment's necessary. One is coming up again at 139 hours anyway. And also, on that same page, we'd like to delete the “begin cabin cold soak.” Over.
- Mike Collins (CAPCOM)
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Apollo 8, this is Houston. Would you please go to P00 and ACCEPT, Jim, and we'll send you a P27.
- Mike Collins (CAPCOM)
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Roger, Jim. You can go back to BLOCK; we got the P27 in and verified. It was a state vector update to the LM slot, and I'm standing by for the midcourse correction number 7 and the entry PAD at your convenience. Over.
- Mike Collins (CAPCOM)
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Okay. Midcourse correction number 7, RCS/G&N: 31600, not applicable, not applicable, 144:45:57.99, minus 00014, plus five zeros, plus 00001. Are you with me so far? Over.
- Jim Lovell (CMP)
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You said not applicable for HA and HP; I started to copy it down, and then I didn't get the right number sequence. Did you skip down to what, VT?
- Mike Collins (CAPCOM)
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No. Let's go back to apogee is not applicable, and then I just started reading the numbers again. From there, I've got a perigee and then a DELTA-VT and then a burn time and so forth. Over.
- Jim Lovell (CMP)
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Okay. I didn't hear a plus or minus on the HP, and I only got four numbers off of it. So could you start with HP again?
- Mike Collins (CAPCOM)
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Okay. Going back to apogee, not applicable; perigee, plus 00191. And you weren't hearing things; it was my mistake. Over.
Expand selection down Contract selection up - Mike Collins (CAPCOM)
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Okay. Picking up with DELTA-VT 00014 004 00014 45 0459 225, Shaula, up 236 000, plus 0813 minus 16503 12202 36301 146:46:41; north set of stars, Sirius and Rigel, roll 308, pitch 209, yaw 357; remarks: perigee in P30 equals plus 22.2 nautical miles. Over.
- Jim Lovell (CMP)
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Roger. Midcourse number 7 RCS/G&N: 31600, not applicable, not applicable, 144:45:57.99. Are you with me?
- Jim Lovell (CMP)
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Minus 00014, plus all zeros, plus 00001 000 304 000, not applicable, plus 00191 00014 004 00014 45 0459 225 Shaula, up 236 000, plus 0813, minus 16503 12202 36301 146:46:41, Sirius, Rigel, 308 209 357, HP, and P30 is 22.2 nautical miles.
- Mike Collins (CAPCOM)
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Okay. Entry PAD: area mid-Pacific, 357 152 359 146:29:13 268, plus 0813, minus 16503 068 36221 651 12202 36301 146:46:13 0028, not applicable four times, in other words, DL MAX, DL MIN, VL MAX, and VL MIN—all not applicable. Starting with TO: 400 0207 0025 0333 0816 16 0590 312. And your vortex star is Zeta Persei, which is half way between Mirfak and Aldebaran, up 165, right 34 up. Remarks: use nonexit EMS pattern. Over.
- Jim Lovell (CMP)
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Entry as follows: mid-Pacific, 357 152 359 146:29:13 268, plus 0813, minus 165 03 068 36221 651 12202 36301 146:46:13 0028, NA 4 times, with TO 400 0207 0025 0333 0816 16 0590 312, Zeta Persei, up 165, right 34, up. And remarks: use nonexit EMS pattern. And Zeta Persei is between Mirfak and Aldebaran, and Frank can never find it anyway.
- Mike Collins (CAPCOM)
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Roger, Jim. In your computer, we'd like to do an erasable memory dump again, like we did the other day, and the reason we'd like to do it is, when you did that P37 about 8 hours ago, and you remember you put that EI time for TIG and got that P00 do thing; we'd like to—We don't think there's anything in the world wrong with it. We think everything is just perfect inside the computer, but we'd like to do an erasable dump as we did the other day; go through it bit by bit. Give us something to do down here. Over.
- Mike Collins (CAPCOM)
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Okay. VERB 01 NOUN 01 ENTER, 333 ENTER, and then read out register 1, and that register 1 should be 10 000. And then if it's not, I can give you procedures for getting it to 10 000. If it is 10 000 as we expect, then VERB 74 ENTER, and that will do the dump. Over.
- Mike Collins (CAPCOM)
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And, Apollo 8, you can do the first part of that now at your convenience to verify that register 1 is reading 10 000, but would you hold up on the dump itself until we get our ground stations configured, please. Over.
- Mike Collins (CAPCOM)
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Apollo 8, Houston. We're configured for the dump. VERB 74 ENTER at your convenience.
Spoken on Dec. 26, 1968, 11:09 p.m. UTC (55 years, 10 months ago). Link to this transcript range is: Tweet