Sunday, February 9, 1992

Lunar Orbiter 3

  1967-008A


Lunar Orbiter 3 was launched on 1967 Feb 5 at 0117 by Atlas Agena D from Cape Kennedy. After a 15 min Earth orbit coast, the Agena reignited at around 0140 to insert Lunar Orbiter III on a translunar trajectory. The midcourse maneuver was made on Feb 6 and the LOI-1 burn was made at 2155 on Feb 8, inserting LO-3 in a 216 x 1791 km orbit. On Feb 12 it was altered to a 55 x 1847 km x 20.9 deg orbit. The photo mission was concluded early due to problems with the readout system - and on March 4 the readout system failed entirely, with 72 of 211 frames still to be downlinked. The mission imaged several Apollo sites and spotted the Surveyor I spacecraft on the lunar surface. From Apr 17 to 21, LO-3 and LO-2 were used in tests for operating multiple spacecraft using the same frequency band. More orbit adjustments were made at 1745 on Apr 12 to shorten an eclipse, on Jun 17 to lengthen orbital life, and on Aug 30 to lower the orbit to simulate an Apollo mission reference orbit. Lunar Orbiter III was finally deorbited on 1967 Oct 9 at 1027.


Lunar Orbiter III 
 

DateTimeEventOrbit  

1967 Feb 5  0117:01 Launch by Atlas Agena D  CK LC13 
 0119:10T+2:09 BECO 
 0121:49T+4:48 SECO  
 0122:10T+5:09 VECO 
 0122:12T+5:11 Fairing 
 0122:15T+5:14 Atlas 5803 sep  -4091 x 182 x 29.5 
 0123:12T+6:11 Agena 6632 burn 1 
 0125:48  T+8:47 Agena MECO-1  88.2 180 x 202 x 29.5 
 0135:26  T+18:25 Agena burn 2 
 0136:55  T+19:54 Agena MECO-2  172 x 408662 x 29.8  
 0139:39 T+22:38 Agena sep 
 0150  T+33m Agena retro 
   180 x 412065 x 29.8  
1967 Feb 6  1502  TCM 5.1m/s 
 1715   40 x 404120 x 30.2 
1967 Feb 8  2154:19  LOI-1 burn 9:03 704.3m/s 
 2204  LOI  200 x 1802 x 20.93 
1967 Feb 8    213 x 1796 x (32.4) B1950 
1967 Feb 12  1813:26  LOI-2 50.7m/s 33.7s  55 x 1847 x 20.9 
  209.0 63 x 2120 x 20.93 (MOR) 
1967 Feb 15   Photo mission begins 
1967 Feb 23   Photo mission ends 
1967 Mar 4   Readout system failed 
1967 Mar 9   Begin extended mission  55 x 1845 x 21.05 
1967 May 25   Solar proton event, 40 rad 
1967 Apr 12    59 x 1841 x 21.3  
1967 Apr 12  1745  TCM 5m/s 3.5s phasing  59 x 1824 x 22.7 
1967 May    
   60 x 1824 x 21.05 
1967 Jul 17 0121:46  TCM 14.4m/s 8.9s height adj 143 x 1824 x 21.05 
1967 Aug   
   144 x 1824 x 20.9 
1967 Aug 30 
1939:19  TCM 198.3m/s 128.5s  144 x 316 x 20.9 
1967 Oct 9    102 x 358 x 21.2 
1967 Oct 9  0933:05  Deorbit 32s, 53m/s  -15.8 x 334 x 21.2  
 0933:38  Deorbit burn complete 
 1027:11  Impact at 14.32N 92.70W 

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