000:47:38 Lovell (onboard): I've got the P52 realign. You might kind of doublecheck me on it; maybe - I'm here and I'm going to turn down the floodlights and get - get my eye adapted here, because I don't see schmatz out there right now.
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000:50:14 Lovell (onboard): Well, are we dark or light out there?
000:50:17 Borman (onboard): Well, you ought to be able to get it even in light. It's getting dark now.
000:50:20 Lovell (onboard): Okay. Well, I want to make sure we got a good one.
000:50:22 Lovell (onboard): Okay, Verb 37, Enter; 52, Enter. You want a REFSMMAT option?
[Jim is having a dialogue with the computer. Verb 37 - Change to the following program, then he keys in 52 to begin executing program 52. He then mentions that he wants to use the REFSMMAT option in this program. This extraordinary acronym refers to the simple idea of a reference orientation which can be well defined and used by the crew in their platform alignments. Jim is using the precise orientation of the launch site at Kennedy Space Center at the time of launch as the reference to which the platform is aligned. Jim's realignment will return the slowly drifting platform to the orientation it had at launch. Note that the actual launch site no longer matches this REFSMMAT. The turning Earth has rotated it away from it.]
000:50:32 Lovell (onboard): Verb 22, Enter; 3, Enter... [Verb 22 lets Jim enter a number into one of the computer's registers; in this case, entering 3 selects option 3, the REFSMMAT option in the program.]
000:50:38 Anders (onboard): There's a couple of nice stars out here.
000:50:40 Lovell (onboard): ...Enter. Okay. All set, gentlemen?
000:50:44 Borman (onboard): Yes.
000:50:46 Anders (onboard): Hey, there's a bunch of stuff flying off this thing.
000:50:47 Lovell (onboard): I know; that's what I was afraid of.
000:50:50 Anders (onboard): Real bright - I wonder why they're so bright?
000:50:52 Borman (onboard): The Sun's shining.
000:50:54 Anders (onboard): Are we - We're boiling?
000:50:55 Borman (onboard): Is the sun shining, really?
000:50:56 Borman (onboard): Yes, look here, I got sun in it.
000:50:58 Anders (onboard): Oh Christ [laughter], I thought it was night time over here!
000:51:01 Anders (onboard): I can see a lot of stars over on this side.
000:51:06 Borman (onboard): What are you doing, Jim?
000:51:07 Lovell (onboard): Well, I'm getting the optics adjusted here.
000:51:09 Borman (onboard): Yes, they make you...
000:51:10 Lovell (onboard): Okay, 06; 06 is what? 06 is Acamar. Worst star in the world for me to look at! Oh, I'm getting more stars now.
[Jim is at the stage where he selects the stars he will use for the realignment. The first he has to use is number 6, Acamar or Theta Eridanus. At about magnitude 3, it's not the brightest star he could be given as his first.]
000:51:22 Lovell (onboard): Okay, here we go, gentlemen.
000:51:24 Anders (onboard): You got a real bright star...
000:51:26 Lovell (onboard): Zero off, right?
000:51:27 Borman (onboard): Yes.
000:51:28 Anders (onboard): Real bright star - star like...
000:51:30 Lovell (onboard): Zero off.
000:51:31 Borman (onboard): CMC; Optic mode should be CMC.
000:51:34 Lovell (onboard): CMC? Oh, to C, huh?
000:51:49 Lovell (onboard): Holy cow!
000:51:50 Borman (onboard): Any luck?
000:51:57 Lovell (onboard): Well, it stopped by a star. The star's out, but I don't know what it is, though.
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009:19:09 Lovell: Also, I've been occasionally looking out to see if I could see stars at various Sun angles, and at this particular attitude, it's very difficult. In the scanning telescope the Sun is very bright and the Earth is very bright,
And if I looked at the Earth and try to look for stars, I lose my dark adaptation very quickly.
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013:32:42 Lovell: In the beginning, the operation with the S-IVB precluded immediate starting up of our sightings as we had scheduled since we had another evasive maneuver. The dumping of [propellant from] the S-IVB caused a tremendous amount of - of pseudo-stars in the area which made an optics calibration practically impossible. The method which we had worked out did not seem to work too well. The method which I finally used was to go into <a href="http://history.nasa.gov/ap08fj/03day1_green_sep.htm#p23" target="new">P23, go to Sirius, which was our brightest star, get the shaft and trunnion, and then fly the spacecraft up to Sirius to use that for the optics cal, which we did at a later time. With regards to light scatter, it appears that at almost any attitude during our Passive Thermal Control, we are receiving light scattering in the scanning telescope. It takes the form mostly of a wide band of light right across the center of the scope about 10 degrees either direction of zero. It is very difficult to see stars in this area. The realignments have been good. I have been able to pick up the star in the sextant to do the alignment, but I was not able to identify the star which we used in such cases as Regor or Menkent in the scanning telescope. The first star sighting which I took of the Earth showed a very indistinct horizon. But there did appear to be a very - or somewhat sharp line between what appeared to be the Earth's horizon and the atmosphere. The landmark line-of-sight filter appeared to help out this horizon definition. There is a very hazy and indistinct horizon through - between the space and the top of the atmosphere itself, and this is a very difficult one to use. As I said before, at times, looking at the Moon with the Sun in the near vicinity, the area around the Moon, the space around the Moon is not dark, but is a light - appears as a light blue. And this is also the same case as looking into the sextant during alignments with the star - with the Sun in somewhat [the] vicinity of the optics. However, I have no difficulty in finding these stars in the sextant. I also had no difficulty in spotting the stars I used, such as Sirius, Procyon, or Canopus against the Earth during our star-horizon measurements. I can see all three of those stars against the Earth background. I believe it will be very difficult to do a backup GDC alignment using the north set stars, since Navi is not too bright of a star. I was able to spot star constellations in the scanning telescope if they were very bright and well known, such as Cetus and Orion; stars of this nature. I was not able to perceive other constellations. That's about the only comments I have at this time. Over.