Sunday, December 21, 2003

Transit 4A

  1961-015A


The Transit IVA satellite tested out the SNAP 3A radioisotope thermoelectric generator (RTG), a nuclear power supply. The spacecraft bus was a new cylindrical design and used magnetic rather than yo-yo despin. The SR and Injun satellites separated from Transit.

The Ablestar rocket exploded when residual propellants ignited.

Gatland (1961) reports a launch time of 1623 UTC (1223 EDT), 12 hours off from the value I have.


Transit IVA 
 

DateTimeEventOrbit  

1961 Jun 29  0423Launch by Thor Ablestar  CC LC17 
 0425  Thor sep 
 0426? Ablestar burn 1 
  Ablestar MECO  150? x 1000? x 66  
  Ablestar burn 2 
 0451  Ablestar MECO-2 
  Ablestar sep 
  SR/Injun sep 
   881 x 998 x 66.81 
 0608:10  Ablestar exploded 
1961 Jul 15   Solar cell experiment end of ops 
1970 May   Beacon still transmitting 
1974? End of transmissions? 

Payload:

  • Beacons C 54/324 MHz Z 150/400 MHz

  • SNAP 3A RTG

  • Solar cell test panel

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