THEMIS P2 --> ARTEMIS P2

Launch data:

Mission details:

• On Jan 1, 2010 ARTEMIS P2 (formerly THEMIS P2) was in a 5518 x 258042 km x 6.5 deg high Earth orbit, and will join P1 en route to the Moon.
• Two of NASA's five Earth orbiting THEMIS spacecraft, THEMIS B and C, were co-opted for ARTEMIS following the end of their primary magnetospheric research missions. Their onboard propulsion systems were used to raise their orbits starting last July, and they are now both operating beyond the orbit of the Moon. THEMIS B made lunar flybys on Jan 31 and Feb 13, 2010. The THEMIS and ARTEMIS missions are led by a team at University of California-Berkeley.
  The spacecraft will study the solar wind, the distant magneto tail, and the lunar wake, and will end up in lunar orbit.
• THEMIS B orbits changings:

    Time UTC
   2009 Sep 10          2870 x 284665 km x 10.0 deg orbit
   2009 Sep 13          2870 x 347000 km translunar injection
   2009 Sep 17 0049     Lunar flyby height 43875 km 
   2009 Sep 26          19690 x 347310 km x 8.8 deg orbit
   2009 Dec  2          32851 x 356728 km x 10.6 deg orbit
   2009 Dec  8 0125     Lunar flyby height 16101 km 
   2009 Dec 25          48908 x 354833 km 
   2010 Jan 31 0813     Lunar flyby height 11992 km  
   2010 Feb 13 1006     Lunar flyby height 2958 km
   2010 Mar 15          Apogee at 1189181 km
   2010 Apr 13 2120     Perigee at 10644 km 
   2010 May 22          At 1438600 km en route to Earth-Moon L2