Results 11 to 20 of about 681,612 (216)
Testing Short-term Variability and Sampling of Primary Volatiles in Comet 46P/Wirtanen [PDF]
The Planetary Science Journal, 2021 The exceptionally favorable close approach of Jupiter-family comet 46P/Wirtanen in 2018 December enabled characterization of its primary volatile composition with exceptionally high spatial resolution and sensitivities using the iSHELL spectrograph at ...
Y. Khan +14 more
semanticscholar +2 more sources
Submillimetric spectroscopic observations of volatiles in comet C/2004 Q2 (Machholz) [PDF]
Astronomy & Astrophysics, 2012 Context. Submillimeter spectroscopic observations of comets provide an important tool for understanding their chemical composition and enable a taxonomic classification. Aims.
Miguel de Val-Borro +8 more
semanticscholar +7 more sources
CO and Other Volatiles in Distantly Active Comets [PDF]
Publications of the Astronomical Society of the Pacific, 2016 The activity of most comets near the Sun is dominated by the sublimation of frozen water, the most abundant ice in comets. Some comets, however, are active well beyond the water-ice sublimation limit of ∼3 au.
Maria Womack +4 more
semanticscholar +3 more sources
An Infrared Investigation of Volatiles in Comet 21P/Giacobini–Zinner [PDF]
Icarus, 1999 We obtained high resolution (λ/δλ∼10,000–20,000) infrared (IR) spectra of Comet 21P/Giacobini–Zinner (GZ) at five different wavelengths between 1.9 and 5.0 μm during 25–29 October 1998 using CSHELL at the NASA Infrared Telescope Facility (IRTF) on Mauna ...
H. Weaver +8 more
semanticscholar +2 more sources
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
doaj +3 more sources
The Astronomical Journal, 2018 The highly favorable 2017 apparition of 2P/Encke allowed the first comprehensive comparison of primary volatile abundances in a given comet across multiple apparitions.
N. Roth +7 more
semanticscholar +2 more sources
Parent Volatiles in Comet 9P/Tempel 1: Before and After Impact
Science, 2005 We quantified eight parent volatiles (H 2 O, C 2 H 6 , HCN, CO, CH 3 OH, H 2 CO, C 2 H 2 , and CH 4 ) in the Jupiter-family comet Tempel 1 using high-
M. Mumma +13 more
semanticscholar +4 more sources
Inventory of the volatiles on comet 67P/Churyumov-Gerasimenko from Rosetta/ROSINA [PDF]
Astronomy & Astrophysics, 2015 Context. The ESA Rosetta spacecraft (S/C) is tracking comet 67P/Churyumov-Gerasimenko in close vicinity. This prolonged encounter enables studying the evolution of the volatile coma composition. Aims. Our work aims at comparing the diversity of the coma of 67P/Churyumov-Gerasimenko at large heliocentric distance to study the evolution of the comet ...
L. L. Roy +17 more
semanticscholar +4 more sources
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
doaj +1 more source
, 2021 A major upgrade to the NIRSPEC instrument at the Keck II telescope was successfully completed in time for near-infrared spectroscopic observations of comet 46P/Wirtanen during its exceptionally close flyby of Earth in 2018 December.
B. Bonev +20 more
semanticscholar +1 more source