Physical characterization of the near-Earth object population S. Ieva, E. Dotto, E. Mazzotta Epifani, D. Perna, E. Perozzi and M. Micheli Eur. Phys. J. Plus, 132 8 (2017) 356 Published online: 21 August 2017 DOI: 10.1140/epjp/i2017-11622-6