Results 1 to 10 of about 86,059 (172)
Exogenic origin for the volatiles sampled by the Lunar CRater Observation and Sensing Satellite impact [PDF]
Nature Communications, 2022 The water and other volatiles observed in the LCROSS impact plume contained too much nitrogen to have originated from volcanic outgassing. These volatiles, stored in the top 1-3 meters of the Cabeus permanently shaded region, were delivered by comet ...
K. E. Mandt +6 more
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Ammonium-bearing phyllosilicate grains detected in Ryugu and Bennu samples via infrared spectroscopy [PDF]
Nature CommunicationsUnderstanding the nature of nitrogen reservoirs in primitive small bodies is fundamental for tracing the evolution of volatiles in the early Solar System and their contribution to prebiotic chemistry.
T. Jiang +33 more
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Dust and Volatiles in the Disintegrating Comet C/2019 Y4 (ATLAS)
Astrophysical JournalC/2019 Y4 (ATLAS) is an Oort cloud comet with an orbital period of ∼5895 yr. Starting in 2020 March, its nucleus underwent disintegration. In order to investigate the gas and dust properties of C/2019 Y4 (ATLAS) during its disintegration, we obtained ...
Aigen Li, Jifeng Liu, R N Zhao
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Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy)
The Astronomical Journal, 2023 Ammonia (NH _3 ), likely the most abundant nitrogen-bearing molecule in cometary ices followed by hydrogen cyanide, is believed to be stored in the nucleus predominantly as a parent ice.
Hideyo Kawakita +7 more
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The Planetary Science Journal, 2023 We measured the chemical composition of comet C/2021 A1 (Leonard) using the long-slit echelle grating spectrograph iSHELL/IRTF on 2021 December 20 and on 2022 January 8 and 9.
Sara Faggi +3 more
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Organic Matter in Cometary Environments
Life, 2021 Comets contain primitive material leftover from the formation of the Solar System, making studies of their composition important for understanding the formation of volatile material in the early Solar System.
Adam J. McKay, Nathan X. Roth
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The Astronomical Journal, 2023 We present a comprehensive analysis of the chemical composition of the Jupiter-family comet and potential spacecraft target 46P/Wirtanen, in the near-IR wavelength range.
Younas Khan +13 more
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TNO or Comet? The Search for Activity and Characterization of Distant Object 418993 (2009 MS9)
The Planetary Science Journal, 2023 The perihelion of the trans-Neptunian object (TNO) 2009 MS9 brings it close to the distance where some long-period comets are seen to become active.
Erica Bufanda +12 more
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Disintegration of Long-period Comet C/2021 A1 (Leonard)
The Astronomical Journal, 2023 We present imaging observations of the disintegrating long-period comet C/2021 A1 (Leonard). High-resolution observations with the Hubble Space Telescope show no evidence for surviving fragments, and place a 3 σ upper limit on their possible radius of ...
David Jewitt +5 more
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The Astronomical Journal, 2023 High-resolution near-infrared ground-based spectroscopic observations of comet 67P/Churyumov–Gerasimenko near its maximum activity in 2021 were conducted from the W. M. Keck Observatory, using the facility spectrograph NIRSPEC.
Boncho P. Bonev +22 more
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