Cometary Science Newsletter Issue 40 July 2018 http://www.cometarysciencenews.org/ (Apologies for the delayed publication. - Ed.) - Comets 46P/Wirtanen and 21P/Giacobini-Zinner - Refereed Journal Papers + Dust modelling and a dynamical study of comet 41P/Tuttle-Giacobini- Kresak during its 2017 perihelion passage, Pozuelos et al. + The optical characteristics of the dust of sungrazing comet C/2012 S1 (ISON) observed at large heliocentric distances, Ivanova et al. + Ultraviolet Observations of Coronal Mass Ejection Impact on Comet 67P/Churyumov–Gerasimenko by Rosetta Alice, Noonan et al. + Implications of the Small Spin Changes Measured for Large Jupiter- Family Comet Nuclei, Kokotanekova et al. Read this issue online: http://www.cometarysciencenews.org/issues/issue-0040.html Submit your items for the next CSN: http://www.cometarysciencenews.org/submit/ Subscribe/unsubscribe to email notifications: http://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.