RE: Apollo 16 Saturn 4B tles guess

From: Dale Ireland (direland@drdale.com)
Date: Wed May 26 2004 - 10:52:19 EDT

  • Next message: Moritz Heger: "Re: Apollo 16 Saturn 4B tles guess"

    Thank you very much Mike
    Not being an expert on TLE's I have a couple questions. First, if the Saturn
    4B missed the Moon wasn't it heading for solar orbit. Can you tell that it
    escaped earth orbit from looking at a value in the TLE's or will they just
    make a larger and larger theoretical earth orbit.?
    Second, can TLE's be converted to Sun centered Keplarian elements (probably
    first to vectors I guess) so the orbits around the Sun of other S4B boosters
    that didn't hit the Moon can be simulated in planetarium programs?
    Dale
    
    -----Original Message-----
    From: Mike McCants [mailto:mmccants@io.com] 
    Sent: Tuesday, May 25, 2004 5:39 PM
    To: SeeSat-L@satobs.org
    Subject: Apollo 16 Saturn 4B tles guess
    
    According to the Apollo 16 timeline:
    
    Apollo 16 was launched on April 16, 1972 at 17:54 UT.
    
    The trans-lunar injection took place from 20:27 to 20:33 UT.
    
    The lunar orbit insertion burn ended on April 19 at 20:28 UT.
    
    The Saturn 4B crashed into the moon on April 19 at 21:02 UT.
    
    I have come up with the following approximate elset for the transfer
    orbit:
    
    Saturn 4B tle guess
    1 06001U 72031B   72107.85416667  .00000000 +00000-0 +00000-0       0
    2 06001 030.0000 339.0000 9690000 315.0000   0.0000 00.09600000     0
    
    This produces the following output for Austin, TX:
    
      ***  1972 Apr 17 *** Times are UT ***
    
      MAG    HGT ALT AZI  HRS MIN     R  A    DEC  RANGE
     12.2  46175  41 282    2  10    5 33.1  27.8  47439
     12.3  48632  37 284    2  35    5 36.9  27.5  50133
     12.5  51022  32 285    3   0    5 40.5  27.3  52778
     12.6  53352  27 287    3  25    5 44.0  27.1  55377
     12.8  55624  23 289    3  50    5 47.2  26.8  57931
     13.1  57844  18 291    4  15    5 50.4  26.6  60443
     13.4  60014  14 293    4  40    5 53.4  26.4  62911
    
      ***  1972 Apr 18 *** Times are UT ***
    
      MAG    HGT ALT AZI  HRS MIN     R  A    DEC  RANGE
     13.9 137565  57 269    2  10    6 56.4  24.7 138177
     14.0 140209  44 276    3  10    6 56.5  24.5 141377
     14.2 142797  31 282    4  10    6 56.9  24.3 144652
    
    Mike McCants
    
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