Results 21 to 30 of about 348,476 (369)
Monitoring near-Earth-object discoveries for imminent impactors [PDF]
Astronomy & Astrophysics, 2018 Aims. We present an automated system called NEORANGER that regularly computes asteroid-Earth impact probabilities for objects on the Minor Planet Center’s (MPC) Near-Earth-Object Confirmation Page (NEOCP) and sends out alerts of imminent impactors to ...
O. Solin, M. Granvik
semanticscholar +1 more source
Feed-Forward Neural Network Denoising Applied to Goldstone Solar System Radar Images
Remote Sensing, 2022 The study of Near-Earth Asteroids (NEA) is crucial for human safety. Small hazardous asteroids with small radar cross sections are not easy to detect, track, and characterize due to the small signal-to-noise ratio (SNR) of the radar echo. This manuscript
Nereida Rodriguez-Alvarez +4 more
doaj +1 more source
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
openaire +9 more sources
Detect-and-describe: Joint learning framework for detection and description of objects [PDF]
, 2022 Traditional object detection answers two questions; "what" (what the object is?) and "where" (where the object is?). "what" part of the object detection can be fine-grained further i.e. "what type", "what shape" and "what material" etc. This results in the shifting of the object detection tasks to the object description paradigm.
arxiv +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
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
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