Temporal and Spatial Aspects of Gas Release During the 2010 Apparition of Comet 103P/Hartley 2 Posted on June 26, 2014 by UHNAI Webmaster in Mumma, M. J., and 12 colleagues (including J. Keane, K. Meech) (). Temporal and Spatial Aspects of Gas Release During the 2010 Apparition of Comet 103P/Hartley 2. , 734,