Results 11 to 20 of about 33,036 (248)
Where do long-period comets come from? 26 comets from the non-gravitational Oort spike [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 The apparent source region (or regions) of long-period comets as well as the definition of the dynamically new comet are still open questions.The aim of this investigation is to look for the apparent source of selected long period comets and to refine ...
Biver +32 more
core +3 more sources
Water Production Activity of Nine Long-Period Comets from SOHO/SWAN Observations of Hydrogen Lyman-alpha: 2013-2016. [PDF]
Icarus, 2018 Combi MR +6 more
europepmc +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
doaj +1 more source
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
Breakup of a long-period comet as the origin of the dinosaur extinction
Scientific Reports, 2021 The origin of the Chicxulub impactor, which is attributed as the cause of the K/T mass extinction event, is an unsolved puzzle. The background impact rates of main-belt asteroids and long-period comets have been previously dismissed as being too low to ...
Amir Siraj, Abraham Loeb
doaj +1 more source
The Demographics of Long‐Period Comets [PDF]
The Astrophysical Journal, 2005 Accepted for publication in Astrophysical Journal.
openaire +3 more sources
The transition between long period comets, short period comets and meteoroid streams [PDF]
International Astronomical Union Colloquium, 1985 It has long been realised that Jovian perturbation is the dominant cause of the transition of long period comets (Period > 200 yr) into short period ones (P < 200 yr). When the differences in the detectability of comets in the two groups are taken into account it is clear that the present day flux of long period comets is sufficient to provide ...
openaire +1 more source
Collision probabilities of migrating small bodies and dust particles with planets [PDF]
, 2009 Probabilities of collisions of migrating small bodies and dust particles produced by these bodies with planets were studied. Various Jupiter-family comets, Halley-type comets, long-period comets, trans-Neptunian objects, and asteroids were considered ...
Drake, Ipatov, Ipatov, Sergei I. Ipatov
core +1 more source
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
doaj +1 more source
The Catalogue of Cometary Orbits and their Dynamical Evolution
, 2020 The new cometary catalogue containing data for almost 300 long-period comets that were discovered before 2018 is announced (the CODE catalogue). This is the first catalogue containing cometary orbits in five stages of their dynamical evolution, covering ...
Dybczyński, Piotr A. +1 more
core +1 more source