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A Portrait throughout Perihelion of the NH2-rich Interstellar Comet 2I/Borisov

  • Authors: Sophie E. Deam, Michele T. Bannister, Cyrielle Opitom, Matthew M. Knight, Léa Ferellec, Ryan Ridden-Harper, Darryl Z. Seligman, Alan Fitzsimmons, Aurélie Guilbert-Lepoutre, Emmanuel Jehin, Laurent Jorda, Michael Marsset, Youssef Moulane, Philippe Rousselot, Pierre Vernazza, Bin Yang

Sophie E. Deam et al 2026 The Planetary Science Journal 7 .

  • Provider: AAS Journals

Caption: Figure 2.

Images of the dust emission (7080–7120 Å) from 2I/Borisov before and after the application of the starkiller pipeline. 2I was within 10 degrees of the Galactic plane on 2020 February 2 and 2020 March 19, and the FOV for each exposure contained between 80 and 136 stars brighter than 21st magnitude in GAIA-G. More significant improvement occurred for the 2020 March 19 data: the number of usable exposures (without a star directly behind 2I) increased from 2 to 3 due to starkilller, allowing for improved median coadding and the removal of more stars. Both rows show the maps with a square root stretch, and the contour levels in the bottom row illustrate the reduction of star flux to below the signal from the coma.

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