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The perihelion activity of comet 67P/Churyumov-Gerasimenko as seen by robotic telescopes

Snodgrass, Colin; Opitom, Cyrielle; de Val-Borro, Miguel; Jehin, Emmanuel; Manfroid, Jean; Lister, Tim; Marchant, Jon; Jones, Geraint H.; Fitzsimmons, Alan; Steele, Iain A.; Smith, Robert J.; Jermak, Helen; Granzer, Thomas; Meech, Karen J.; Rousselot, Philippe and Levasseur-Regourd, Anny-Chantal (2016). The perihelion activity of comet 67P/Churyumov-Gerasimenko as seen by robotic telescopes. Monthly Notices of the Royal Astronomical Society, 462(Suppl_1) S138-S145.

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Around the time of its perihelion passage the observability of 67P/Churyumov-Gerasimenko from Earth was limited to very short windows each morning from any given site, due to the low solar elongation of the comet. The peak in the comet's activity was therefore difficult to observe with conventionally scheduled telescopes, but was possible where service/queue scheduled mode was possible, and with robotic telescopes. We describe the robotic observations that allowed us to measure the total activity of the comet around perihelion, via photometry (dust) and spectroscopy (gas), and compare these results with the measurements at this time by Rosetta's instruments. The peak of activity occurred approximately two weeks after perihelion. The total brightness (dust) largely followed the predictions from Snodgrass et al. (2013), with no significant change in total activity levels from previous apparitions. The CN gas production rate matched previous orbits near perihelion, but appeared to be relatively low later in the year.

Item Type: Journal Item
Copyright Holders: 2016 The Authors
ISSN: 1365-2966
Project Funding Details:
Funded Project NameProject IDFunding Body
Rutherford fellowshipNot SetSTFC
Keywords: Comets; individual; 67P/Churyumov-Gerasimenko
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Item ID: 47290
Depositing User: Colin Snodgrass
Date Deposited: 13 Sep 2016 14:15
Last Modified: 02 May 2019 17:28
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