Results 21 to 30 of about 171,503 (343)
Comets in the near-Earth object population [PDF]
Icarus, 2008 Abstract Because the lifespan of near-Earth objects (NEOs) is shorter than the age of the Solar System, these objects originate elsewhere. Their most likely sources are the main asteroid belt and comets. Through physical observations we seek to identify potential dormant or extinct comets among “asteroids” catalogued as NEOs and thereby determine the
Demeo, Francesca E., Binzel, Richard P.
openaire +3 more sources
Spitzer Albedos of Near-Earth Objects [PDF]
The Astronomical Journal, 2019 Abstract Thermal infrared observations are the most effective way to measure asteroid diameter and albedo for a large number of near-Earth objects (NEOs). Major surveys like NEOWISE, NEOSurvey, ExploreNEOs, and NEOLegacy find a small fraction of high albedo objects that do not have clear analogs in the current meteorite population. About
Annika Gustafsson +8 more
openaire +4 more sources
Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon [PDF]
Astronomical Journal, 2018 (3200) Phaethon is a compelling object as it has an asteroidal appearance and spectrum, produces a weak dust tail during perihelion at just 0.14 au, and is the parent body of the Geminid Meteor Shower. A better understanding of the physical properties of
T. Kareta +7 more
semanticscholar +1 more source
Photometric survey of 67 near-Earth objects [PDF]
Astronomy & Astrophysics, 2018 Context. The near-Earth object (NEO) population is a window into the original conditions of the protosolar nebula, and has the potential to provide a key pathway for the delivery of water and organics to the early Earth. In addition to delivering the crucial ingredients for life, NEOs can pose a serious hazard to humanity since they can impact the ...
Roberto Speziali +12 more
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Dormant comets among the near-Earth object population: a meteor-based survey [PDF]
, 2016 Dormant comets in the near-Earth object (NEO) population are thought to be involved in the terrestrial accretion of water and organic materials. Identification of dormant comets is difficult as they are observationally indistinguishable from their ...
Q. Ye, P. Brown, P. Pokorn'y
semanticscholar +1 more source
Infrared Light Curves of Near-Earth Objects [PDF]
The Astrophysical Journal Supplement Series, 2018 Abstract We present light curves and derive periods and amplitudes for a subset of 38 near-Earth objects (NEOs) observed at 4.5 μm with the IRAC camera on the the Spitzer Space Telescope, many of them having no previously reported rotation periods. This subset was chosen from about 1800 IRAC NEO observations as having obvious periodicity
Howard A. Smith +13 more
openaire +5 more sources
Extended photometric survey of near-Earth objects [PDF]
Astronomy & Astrophysics, 2020 Context. The near-Earth objects (NEOs), whose proximity makes them the most accessible bodies in the Solar System, allow us to sample asteroids from tens of kilometers down to objects of a few meters in size. However, while the physical properties for the largest bodies are mostly known, we have very little physical information regarding the small NEOs.
I. Bertini +11 more
openaire +2 more sources
Proton irradiation results for long-wave HgCdTe infrared detector arrays for Near-Earth Object Camera [PDF]
, 2016 . HgCdTe detector arrays with a cutoff wavelength of ∼10 μm intended for the Near-Earth Object Camera (NEOCam) space mission were subjected to proton-beam irradiation at the University of California Davis Crocker Nuclear Laboratory.
M. Dorn +8 more
semanticscholar +1 more source
Geophysical Research Letters, 2023 Small meteoroids that enter Earth's atmosphere often go unnoticed because their detection and characterization rely on human observations, introducing observational biases in space and time.
Stephen P. Hicks +10 more
doaj +1 more source
Evaluation of a Laser Altimeter using the Pseudo-Random Noise Modulation Technique for Apophis Mission [PDF]
Journal of Astronomy and Space Sciences, 2021 Apophis is a near-Earth object with a diameter of approximately 340 m, which will come closer to the Earth than a geostationary orbit in 2029, offering a unique opportunity for characterizing the object during the upcoming encounter.
Hyung-Chul Lim +7 more
doaj +1 more source