Editing CONTOUR (section)

===Design and construction===
The ''CONTOUR'' spacecraft was constructed in-house at the [[Johns Hopkins University]] [[Applied Physics Laboratory]]. ''CONTOUR'' was shaped as an [[octagonal prism]], measuring at {{convert|2.1|m|ft}} tall and {{convert|1.8|m|ft}} long, had a total fueled mass of {{cvt|398|kg|lb}} at launch, not including the {{cvt|377|kg|lb}} mass of the [[Star 30]] [[Booster (rocketry)|booster]] it was attached to, during the launch phase of the mission.<ref name=nssdc/> The spacecraft was fitted with a {{cvt|25|cm|in}} [[whipple shield]], similar to the one used on ''[[Stardust (spacecraft)|Stardust]]'', on its leading face, designed with four layers of nextel fabric and seven layers of [[kevlar]].{{r|sfn-spacecraft|Ulivi_2012}} The shield was built to allow the spacecraft to withstand the respective 28.2 and 14&nbsp;km/s velocity flybys of comets Encke and Schwassmann-Wachmann-3, where the spacecraft would be subjected to numerous particles ejecting from the [[comet nucleus|nuclei]] of the comets.<ref name=Osegueda_2001/> Although mission scientists predicted that the spacecraft would take no significant damage during the Encke and Schwassmann-Wachmann-3 encounters, the shield and its [[prototype]]s were tested vigorously during the construction of the spacecraft, including one where a shield prototype was shot at with surrogate [[nylon]] particles from a two stage [[light-gas gun]]. The results of the earlier tests allowed mission planners to determine a safe distance from which the ''CONTOUR'' would pass by comets targeted on the mission.<ref name=Osegueda_2001/> Three of the four [[scientific instrument]]s aboard the spacecraft were embedded within this shield.<ref name=sfn-spacecraft/>