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The Rendezvous of the Rosetta Mission at Comet 67P/Churyumov-Gerasimenko

As the spacecraft completed a complex series of nine orbital maneuvers since the end of hibernation on Jan. 20, 2014, orbit entry took place on Aug. 6, 2014 August and triggered by a small thruster firing lasting just 6 min 26 sec. Such commands were uploaded to the craft from Earth during the night of Aug. 4 as the Rosetta mission was at 22 minutes of light away. After the burn, Rosetta was to fly the first leg of a series of three-legged triangular, 62-mile long paths about the comet. Rosetta will take between three and four days to complete each leg

The orbit entry timeline was to unfold like:

August 5th, 2014

GMT/CEST Event Details
08:04/10:04 BoT New Norcia tracking station ESA 35 m station, Australia
19:41/21:41 EoT New Norcia tracking station  
20:00/22:00 BoT DSS-63 tracking station NASA 70 m station Madrid

August 6th, 2014

GMT/CEST Event Details
00:05/02:05 EoT DSS-63  
00:10/02:10 BoT Malargüe tracking station ESA 35 m station, Argentina
02:41/04:41 EoT Malargüe  
02:50/04:50 BoT DSS-15 NASA 34 m station, Goldstone, USA
07:35/09:35 EoT DSS-15   
08:00/10:00 BoT New Norcia tracking station
AoS telemetry data flow (see below)
 
  Rosetta slews into position for thruster burn
09:00:01/11:00:01 Start: Comet Approach Trajectory – insertion thruster burn Start of orbit entry manoeuvre. Must wait 1-way light time for confirmation on ground
09:06:27/11:06:27 End: thruster burn Rosetta now on first leg of cometary orbit
  Rosetta slews back to comet-pointing mode 
09:22:30/11:22:30 Start of thruster burn confirmed on ground  
09:28:56/11:28:56 End of thruster burn confirmed on ground   
19:43/21:43 EoT New Norcia  
19:48/21:48 BoT Malargüe tracking station  

Notes (all times subject to change): BoT: Beginning of track, EoT: End of track, AoS: Acquisition of signal, LoS: Loss of signal

Website Manager: G. Guichard, site 'Amateur Astronomy,' http://stars5.6te.net. Page Editor: G. Guichard. last edited: 8/7/2014. contact us at ggwebsites@outlook.com
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