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Near-perihelion activity and composition of 3I/ATLAS from JUICE/MAJIS observations
D. Bockelee-Morvan, F. Poulet, Y. Langevin +16
We present visible-to-infrared (0.5-5.56 microns) observations of the interstellar comet 3I/ATLAS obtained with the Moons and Jupiter Imaging Spectrometer (MAJIS) aboard the Jupite…
Identification of Ammonium Salts on Comet 67P/C-G Surface from Infrared VIRTIS/Rosetta Data Based on Laboratory Experiments. Implications and Perspectives
Olivier Poch, Istiqomah Istiqomah, Eric Quirico +29
The nucleus of comet 67P/Churyumov-Gerasimenko exhibits a broad spectral reflectance feature around 3.2 m, which is omnipresent in all spectra of the surface, and whose attribut…
Evolution of pits at the surface of 67P/Churyumov-Gerasimenko
Selma Benseguane, Aurélie Guilbert-Lepoutre, Jérémie Lasue +6
The observation of pits at the surface of comets offers the opportunity to take a glimpse into the properties and the mechanisms that shape a nucleus through cometary activity. If…
Water Ortho-to-Para ratio in the coma of comet 67P/Churyumov-Gerasimenko
Y. -C. Cheng, D. Bockelée-Morvan, M. Roos-Serote +9
Abundance ratios of the nuclear-spin isomers of HO and NH have been measured in about two dozen comets, with a mean value corresponding to a nuclear-spin temperature of $\s…
Infrared detection of aliphatic organics on a cometary nucleus
A. Raponi, M. Ciarniello, F. Capaccioni +28
The ESA Rosetta mission has acquired unprecedented measurements of comet 67/P-Churyumov-Gerasimenko (hereafter 67P) nucleus surface, whose composition, as determined by in situ and…
Ammonium salts are a reservoir of nitrogen on a cometary nucleus and possibly on some asteroids
O. Poch, I. Istiqomah, E. Quirico +29
The measured nitrogen-to-carbon ratio in comets is lower than for the Sun, a discrepancy which could be alleviated if there is an unknown reservoir of nitrogen in comets. The nucle…