The spacecraft architecture, first presented in 2014, is based on a 6-unit CubeSat with a stowed envelope slightly larger than 10×20×30 cm, a mass of 14 kg (31 lb),[1] cold gas thruster system,[12] and primarily based on the use of commercial off-the-shelf parts.[3] While it is possible for a 6U CubeSat to reach an NEA with conventional chemical propulsion, both the number of targets and the launch window would be tightly constrained.