API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API

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 Revised: Jan 31, 2011    Stardust Spacecraft Bus & NExT / (Sun)            -29
                             http://stardust.jpl.nasa.gov/ 

 NOTE: Updated with Tempel 1 pre-encounter trajectory, including nominal (NOT 
 reconstructed) TCM-31, which targets 200 km flyby on 2011-Feb-15 04:39:16 UTC.

 To obtain an ephemeris relative to the comet Tempel 1 navigation solution
 (s11025p_s89g), set center as "@1000093".  Conversely, to obtain an ephemeris
 of the comet relative to NExT s/c, set target "1000093" and set center 
 "@next".

 BACKGROUND
  Launched: Feb 7, 1999. Primary goal: collect comet dust and sample other 
  volatiles during a close-encounter with comet Wild 2 in Jan 2004. Captured 
  particles were parachuted to Earth (Utah) 2006-Jan-15.

  See the web-page above for extensive information on the Stardust Mission.

  Nominal 0.00374 AU Earth flyby 2009-Jan-14, but the spacecraft has been 
  retasked as the NExT mission to revisit comet Tempel 1 on 2011-Feb-14.

 SPACECRAFT TRAJECTORY:
  The spacecraft has two components. This specific trajectory is for the main
  spacecraft bus (ID= -29). After release of the Sample Return Capsule (SRC, 
  ID= -29900), to occur on 2006-Jan-15 05:57:05.519 UTC, thrusters will divert
  the bus so it misses the Earth. The SRC, whose trajectory is available
  separately, will parachute back to Earth. 

  Mission trajectory based on merged set (further details on request):
   Trajectory name                              Start           End
   ---------------------                     -----------    -----------
   SDU_L_1999                                1999-Feb-07    1999-Dec-31
   SDU_L_2000                                1999-Dec-31    2000-Dec-31
   SDU_L_2001                                2000-Dec-31    2001-Dec-31
   SDU_L_2002                                2001-Dec-31    2002-Dec-31
   SDU_L_2003_W2                             2002-Dec-31    2004-Jan-15
   SDU_L_2004                                2004-Jan-15    2005-Jan-01  
   SDU_L_2005_RETURN                         2005-Jan-01    2005-Dec-28
   sdu_bus_060111_NOMAP                      2005-Dec-28    2006-Jan-15
   sdu_bus_060111                            2006-Jan-15    2006-Jan-16
   pfile_long_prop                           2006-Jan-16    2007-Aug-13 
   29_s07274a_TCM21                          2007-Aug-13    2008-Nov-18
   SDU_L_090107_081118_110313_TCM-25         2008-Nov-18    2011-Jan-14
   SDU_L_090123_090114_110313_TCM28_initial  2009-Jan-14    2010-Nov-21
   SDU_L_101121_110126_110313_tcm31_final    2010-Nov-21    2011-Mar-13

   Data-fit: 2005-Dec-28 to 2006-Jan-11 (incl. post TCM-18 trckng (pre TCM-19)
   Predicts: 2006-Jan-11 to 2006-Jan-16 
   Data-fit: 2006-Jan-16 to 2006-Jan-30
   Predicts: 2006-Jan-31 to 2007-Aug-13
   Data-fit: 2007-Aug-13 to 2008-Feb
   Predicts: 2009-Jan-23 to 2010-Nov-21
   Data-fit: 2010-Nov-21 to 2011-Jan-26
   Predicts: 2011-Jan-26 to 2011-Mar-13
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