“…ESA's Hera mission (Michel et al, 2018), the European component of the Asteroid Impact and Deflection Assessment (AIDA) international collaboration (Cheng et al, 2015), plans on deploying two CubeSats in the proximity of binary system 65803 Didymos, after arrival in 2027. The idea is supported by several SmallSat/CubeSat studies that have been performed in the past few years with reference to Hera (formerly known as AIM), to study the feasibility of deploying a small lander Lavagna, 2018, 2016;Lange et al, 2018;C ¸elik et al, 2019) and possibly CubeSats (Kohout et al, 2018;Lasagni Manghi et al, 2018;Perez et al, 2018) in the close proximity of Didymos. These were anticipated by detailed studies of the dynamical environment near binary asteroid systems (Tardivel and Scheeres, 2013;Tardivel, 2016;Ferrari et al, , 2014C ¸elik and Sánchez, 2017), some with direct application to the Didymos case study (Dell'Elce et al, 2017;Capannolo et al, 2019Capannolo et al, , 2016.…”