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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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Splitting of Long-period Comet C/2018 F4 (PANSTARRS)
The Astronomical Journal, 2023 Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its inner region in 2020 September, suggestive of a splitting event. We here present analyses of our observations of the comet taken from the LCO Outbursting Objects Key project ...
Man-To Hui +6 more
doaj +3 more sources
CO and CO2 Productions Rates of Comets Observed by NEOWISE within Year 1 of the Reactivated Mission
The Planetary Science Journal, 2023 We report on the observed fluxes of the comets detected by NEOWISE during the first year of operations after the spacecraft’s reactivation. The sample included 57 comets.
Adeline Gicquel +4 more
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Origin and Evolution of Long-period Comets [PDF]
The Astronomical Journal, 2019 Abstract We develop an evolutionary model of the long-period comet (LPC) population, starting from their birthplace in a massive trans-Neptunian disk that was dispersed by migrating giant planets. Most comets that remain bound to the solar system are stored in the Oort cloud.
David Vokrouhlický +2 more
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Reassessing the Source of Long-Period Comets [PDF]
Science, 2009 Inside Oort Long-period comets are thought to come from the outermost region of the solar system, the Oort Cloud, where a large number of icy bodies orbit the Sun. Outer Oort Cloud bodies are more likely to penetrate the inner planetary region of the solar system as comets, because they experience stronger external gravitational ...
Kaib, Nathan A., Quinn, Thomas
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The Evolution of Long-Period Comets [PDF]
Icarus, 1999 We study the evolution of long-period comets by numerical integration of their orbits, following comets from their origin in the Oort cloud until their final escape or destruction, in a model solar system consisting of the Sun, the four giant planets and the Galactic tide.
Wiegert, Paul, Tremaine, Scott
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Destruction of Long-period Comets
The Astronomical Journal, 2022 Abstract We identify a sample of 27 long-period comets for which both nongravitational accelerations and Lyα-based gas production rates are available. Seven of the 27 comets (i.e., ∼25%) did not survive perihelion because of nucleus fragmentation or complete disintegration.
openaire +2 more sources
Dust Properties of Comets Observed by Spitzer
The Planetary Science Journal, 2023 As comets journey into the inner solar system, they deliver particulates and volatile gases into their comae that reveal the most primitive materials in the solar system.
David E. Harker +3 more
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Some Statistics on Long-Period Comets [PDF]
Symposium - International Astronomical Union, 1979 Distributions of the original reciprocal semimajor axes l/a and the perihelion distances q of eighty “new” comets (Marsden et al, 1978) are discussed from the view point of a hypothesis of the interstellar origin (Hasegawa, 1976).
I. Hasegawa, T. Shimizu
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Disintegrating Inbound Long-period Comet C/2019 J2 [PDF]
The Astrophysical Journal Letters, 2019 Abstract We present observations of the disintegrating long-period comet C/2019 J2 (Palomar), taken to determine the nature of the object and the cause of its demise. The data are consistent with the break-up of a sub-kilometer nucleus into a debris cloud of mass ∼109 kg, peaking on UT 2019 May 24 ± 12. This is ∼56 days before perihelion
Jewitt, David, Luu, Jane
openaire +4 more sources