Plasma characterization at comet 67P between 2 and 4 AU from the Sun with the RPC-MIP instrument Gaëtan Wattieaux, Pierre Henri, Nicolas Gilet, Xavier Vallières and Jan Deca A&A, 638 (2020) A124 Published online: 24 June 2020 DOI: 10.1051/0004-6361/202037571