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

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 Revised: Aug 7, 2019             Nozomi Spacecraft                       -178
                http://www.isas.ac.jp/e/enterp/missions/nozomi/cont.html

 NOTE: On 2019-Aug-7, the trajectory was updated here to include earlier 
  archival time-spans. There has been no new tracking information for this 
  mission which was declared lost in 2003.

 Project was managed by Japan/ISAS. See above web page for mission information.

 BACKGROUND
  The NOZOMI (PLANET-B) was to be the first Japanese Mars orbiter. It was 
  launched on 1998-Jul-03 18:12 UTC, on the second flight of the M-V launch 
  vehicle from Kagoshima Space Center. 

  The primary scientific objective of the PLANET-B program was to study the 
  Martian upper atmosphere with emphasis on its interaction with the solar 
  wind. 

 SPACECRAFT
  NOZOMI weighed 541 kg, including the fuel for attitude and orbit control, 
  and was to orbit Mars with 150 km periapsis and 15 Mars radii apoapsis on 
  its arrival at Mars.

  However, electrical problems caused the spacecraft to fail prior to arrival
  and the 

 TRAJECTORY
  After launch, Nozomi was placed in a geocentric 3400 x 400,000 km parking 
  orbit.

  Lunar flybys on 1998-Sep-24 and 1998-Dec-18 increased apogee, leading to
  Earth flyby on 1998-Dec-20 at a 1000 km perigee. 

  This gravity-assist, combined with a thruster firing was intended to insert
  on a Mars-bound trajectory. However, a malfunctioning fuel valve during the 
  flyby lost fuel and required two further correction burns.

  The mission was replanned for a four-year heliocentric trajectory with two 
  Earth flybys in Dec 2002 and June 2003, with arrival at Mars in December 
  2003.

  Attempts to orient the spacecraft as it approached Mars on 2003-Dec-9 
  (in preparation for the 2003-Dec-14 orbit insertion thruster firing) failed,
  and the mission was abandoned after small thruster firings redirected 
  it away from potential Mars impact.
 
  The spacecraft instead flew past Mars on December 14 of 2003 and continued 
  in a heliocentric orbit.

 The trajectory here is a planning trajectory (NOT fit to tracking data) 
 from the JPL Multi-mission Navigation Team. The prediction was created on
 1999-Jan-23 and begins seven months after launch, after the partly failed 
 first Earth-flyby required mission replan and extension: 

  Trajectory name                           Start (TDB)        Stop (TDB)
  -------------------------------------  -----------------  -----------------
  planetb_pb98                           1999-Feb-08 12:01  2003-Dec-14:00:00
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