Cometary Science Newsletter Issue 46 January 2019 https://www.cometarysciencenews.org/ - Conference Announcements + Centaur Exploration Workshop: The Roots of Activity + ABSCICON 2019 Session: Have Comet, Will Travel! - Refereed Journal Articles + Monitoring of the activity and composition of comets 41P/Tuttle–Giacobini–Kresak and 45P/Honda–Mrkos–Pajdusakova, Moulane et al. + Reactive collision of electrons with CO+ in cometary coma, Moulane et al. + Active Asteroid P/2017 S5 (ATLAS), Jewitt et al. Read this issue online: https://www.cometarysciencenews.org/issues/issue-0046.html Submit your items for the next CSN: https://www.cometarysciencenews.org/submit/ Subscribe/unsubscribe to email notifications: https://www.cometarysciencenews.org/subscribe/ -- The Cometary Science Newsletter is dedicated to sharing and furthering cometary science. CSN invites contributions from the astronomical and planetary science communities, including abstracts of papers accepted for publication in refereed journals, thesis abstracts, timely notes on particular comets, conference announcements, job announcements, or other relevant and brief scientific communications. Relevant topics include observational, theoretical, and laboratory work concerning comets, but also may include studies of associated phenomena, such as Centaurs, asteroid-comet transition objects, debris disks, and protoplanetary disks.