A
Alan Fitzsimmons
Researcher at Queen's University Belfast
Publications - 250
Citations - 10001
Alan Fitzsimmons is an academic researcher from Queen's University Belfast. The author has contributed to research in topics: Comet & Asteroid. The author has an hindex of 48, co-authored 238 publications receiving 9171 citations. Previous affiliations of Alan Fitzsimmons include Queen's University & Queen Mary University of London.
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Size, albedo, and taxonomic type of potential spacecraft target Asteroid (10302) 1989 ML
TL;DR: The Amor-type near-Earth Asteroid (10302) 1989 ML has an Earth-like orbit (period 1.44 yr, eccentricity 0.14, inclination 4.4°), therefore the energy required to reach it from the Earth is relatively small making it a very attractive target for rendezvous missions.
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A comparison of oxygen and nitrogen abundances in young clusters and associations and in the interstellar gas
TL;DR: In this paper, the authors used previously published observations of main-sequence B-type stars lying in 11 young stellar clusters and associations to estimate non-LTE abundances of oxygen and nitrogen over galactocentric distances 6
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A dwarf planet class object in the 21:5 resonance with Neptune
Matthew J. Holman,Matthew J. Payne,Wesley C. Fraser,Pedro Lacerda,Michele T. Bannister,Michael Lackner,Ying-Tung Chen,Hsing Wen Lin,K. W. Smith,Rositako Kotanekova,David Young,K. C. Chambers,S. Chastel,L. Denneau,Alan Fitzsimmons,H. Flewelling,Tommy Grav,M. E. Huber,Nick Induni,Rolf-Peter Kudritzki,Alex Krolewski,Robert Jedicke,Nick Kaiser,E. Lilly,E. A. Magnier,Zachary Mark,Karen J. Meech,Marco Micheli,Daniel Murray,Alex Parker,Pavlos Protopapas,Darin Ragozzine,Peter Vereš,R. J. Wainscoat,C. L. Waters,Robert Weryk +35 more
TL;DR: In this paper, the Pan-STARRS Outer Solar System Survey has reported the discovery of a $H_r = 3.4\pm 0.1$ dwarf planet candidate.
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The perihelion activity of comet 67P/Churyumov–Gerasimenko as seen by robotic telescopes
Colin Snodgrass,Cyrielle Opitom,Miguel de Val-Borro,Miguel de Val-Borro,Emmanuel Jehin,Jean Manfroid,T. A. Lister,Jon Marchant,Geraint H. Jones,Geraint H. Jones,Alan Fitzsimmons,Iain A. Steele,Robert J. Smith,Helen Jermak,Helen Jermak,T. Granzer,Karen J. Meech,Philippe Rousselot,Anny Chantal Levasseur-Regourd +18 more
TL;DR: In this paper, the authors measured the total activity of the comet around perihelion, via photometry (dust) and spectroscopy (gas), and compared these results with the measurements at this time by Rosetta's instruments.
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Outgassing behavior of c/2012 s1 (ison) from 2011 september to 2013 june
Karen J. Meech,Karen J. Meech,Bin Yang,Bin Yang,Jan Kleyna,Jan Kleyna,Megan Ansdell,Hsin-Fang Chiang,Hsin-Fang Chiang,Olivier Hainaut,Jean-Baptiste Vincent,Hermann Boehnhardt,Alan Fitzsimmons,Travis A. Rector,Timm Riesen,Timm Riesen,Jacqueline V. Keane,Jacqueline V. Keane,Bo Reipurth,Bo Reipurth,Henry H. Hsieh,Peter Michaud,Giannantonio Milani,E. Bryssinck,R. Ligustri,R. Trabatti,G. P. Tozzi,Stefano Mottola,E. Kuehrt,Bhuwan C. Bhatt,D. K. Sahu,Carey M. Lisse,Larry Denneau,Robert Jedicke,Eugene A. Magnier,Richard J. Wainscoat +35 more
TL;DR: In this article, the authors report photometric observations for comet C/2012 S1 (ISON) obtained during the time period immediately after discovery (r = 6.28 ǫ-AU) until it moved into solar conjunction in mid-2013 June using the UH2.