Results 11 to 20 of about 902 (203)
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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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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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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The Return of the Rosetta Target: Keck Near-infrared Observations of Comet 67P/Churyumov–Gerasimenko in 2021 [PDF]
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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Six Outbursts of Comet 46P/Wirtanen [PDF]
The Planetary Science Journal, 2021 Cometary activity is a manifestation of sublimation-driven processes at the surface of nuclei. However, cometary outbursts may arise from other processes that are not necessarily driven by volatiles.
Michael S. P. Kelley +37 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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The volatile composition of comet C/2017 K2 (PanSTARRS) [PDF]
, 2022 <p class="p1">We present high resolution spectra of comet C/2017 K2 (PanSTARRS) (hereafter 17K2), obtained using the upgraded high resolution spectrometer of the VLT, CRIRES<span class="s1">+</span>.
Manuela Lippi +4 more
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The Astronomical Journal, 2017 Abstract On 2014 May 22 and 24 we characterized the volatile composition of the dynamically new Oort cloud comet C/2012 K1 (PanSTARRS) using the long-slit, high resolution (λ/Δλ ≈ 25,000) near-infrared echelle spectrograph (NIRSPEC) at the 10 m Keck II telescope on Maunakea, Hawaii.
Nathan X. Roth +6 more
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Hyper-volatiles in Comet C/2010 G2 (Hill)
, 2013 We performed high-dispersion near-infrared spectroscopic observations of comet C/2010 G2 (Hill) at 2.5 AU from the Sun using NIRSPEC (R ~ 2.5x10^4) at the Keck II telescope on UT 2012 Jan 9 and 10. The comet had been in outburst. Over the two nights of our observations, prominent emission lines of CH4 and C2H6 along with weaker emission lines of H2O ...
Kawakita, Hideyo +7 more
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Dust and Volatiles in the Disintegrating Comet C/2019 Y4 (ATLAS)
The 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 ...
Ruining Zhao +6 more
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