PDS_VERSION_ID = PDS3 OBJECT = MISSION MISSION_NAME = "CONTOUR MISSION" OBJECT = MISSION_INFORMATION MISSION_START_DATE = 2002-07-05 MISSION_STOP_DATE = 2002-08-15 MISSION_ALIAS_NAME = "CONTOUR" MISSION_DESC = " The Comet Nucleus Tour, or CONTOUR, mission launched from Cape Canaveral on July 3, 2002. Six weeks later, on August 15, contact with the spacecraft was lost after a planned maneuver that was intended to propel it out of Earth orbit and into its comet-chasing solar orbit. Evidence suggests the spacecraft split into several pieces, and so far all efforts to make contact with CONTOUR have failed. From http://discovery.nasa.gov/contour.html Copyright 2002 NASA Discovery Program Used by Permission The reference is listed as N/A (not applicable) below because the mission ended before any significant publications. " MISSION_OBJECTIVES_SUMMARY = " The CONTOUR mission was timed to encounter and study two very different comets as they make their periodic visits to the inner solar system. At each comet flyby, the spacecraft was to get as close as 60 miles (100 kilometers) to take high resolution pictures and perform a detailed compositional analyses of both gas and dust in the near-nucleus environment, as well as determine the comet's precise orbit. The science objectives are to dramatically improve our knowledge of key characteristics of comet nuclei and to assess their diversity. The spacecraft was scheduled to flyby Comet Encke in November 2003 and Comet Schwassmann-Wachmann-3 in June 2006. Encke is a very 'evolved' comet that has maintained a stable and regular orbit for thousands of years. Schwassmann-Wachmann-3 had a very predictable activity pattern until 1995 when it split into at least three pieces. It was of interest for this mission because it is likely that evidence of the internal structure of the comet would still be exposed when CONTOUR arrived. The mission also anticipated the possibility of being retargeted to encounter a 'new' comet that has never before been seen in this part of the solar system. From http://discovery.nasa.gov/contour.html Copyright 2002 NASA Discovery Program Used by Permission " END_OBJECT = MISSION_INFORMATION OBJECT = MISSION_REFERENCE_INFORMATION REFERENCE_KEY_ID = "N/A" END_OBJECT = MISSION_REFERENCE_INFORMATION OBJECT = MISSION_HOST INSTRUMENT_HOST_ID = CON OBJECT = MISSION_TARGET TARGET_NAME = COMET END_OBJECT = MISSION_TARGET END_OBJECT = MISSION_HOST END_OBJECT = MISSION END