Results 231 to 240 of about 4,153,032 (280)

The population of near-Earth objects discovered by Spacewatch

Earth, Moon, and Planets, 1996
In the past three years the Spacewatch program at the University of Arizona’s Lunar and Planetary Laboratory has discovered ~45% of the new Earth Approaching asteroids and found evidence for an unheralded population of small (~10m) objects in the inner solar system.
T. Gehrels, R. Jedicke
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Autonomous on-board Near Earth Object detection

2015 IEEE Applied Imagery Pattern Recognition Workshop (AIPR), 2015
Most large asteroid population discovery has been accomplished to date by Earth-based telescopes. It is speculated that most of the smaller Near Earth Objects (NEOs) that are less than 100 meters in diameter, whose impact can create substantial city-size damage, have not yet been discovered.
Purnima Rajan, Philippe Burlina, M. Chen, D. Edell, Bruno Jedynak, N. Mehta, Ayushi Sinha, Gregory D. Hager   +7 more
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The Near-Earth Object Population

Icarus, 2000
We examine the dynamics of a sample of 117 near-Earth objects (NEOs) over a time scale of 60 Myr. We find that while 10–20% end their lifetimes by striking a terrestrial planet (usually Venus or Earth), more than half end their lives in a Sun-grazing state, and about 15% are ejected from the Solar System.
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INEO—Imaging of near-Earth objects

Acta Astronautica, 1994
Abstract INEO is a program of four explorer flyby missions for imaging near-Earth objects by means of small spin stabilized spacecrafts. A low-cost approach is achieved by using existing hardware and available scientific instrumentation. For the first mission the payload consists of the flight space model of the Halley multicolour camera and three ...
H. Iglseder, W. Arens-Fischer, H.U. Keller, G. Arnold, R. Callies, M. Fick, K.H. Glaßmeier, H. Hirsch, H.J. Rath, M. Hoffmann, E. Kührt, E. Lorenz, N. Thomas, R. Wäsch   +13 more
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The SRT, near-earth objects and space debris

2006
The improvements, by means of radar observations, of the accuracy with which the orbits of near Earth asteroids and comets are determined are a key factor in order to be able to exclude future collisions of any of these bodies with the Earth. The SRT, once equipped with a suitable transmitter, can have an important role in this context.
VALSECCHI G. B, MILANI COMPARETTI, ANDREA, ROSSI A, TOMMEI, GIACOMO   +3 more
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Near-Earth Objects and the United Nations

2018
This chapter presents the past, current and future efforts of the United Nations (UN) through its Office for Outer Space Affairs (UNOOSA) and the United Nations (UN) Committee on the Peaceful Uses of Outer Space (COPUOS) in the field of near-Earth objects and planetary defense.
Romana Kofler, Daniel Garcia Yarnoz, Martin Staško   +2 more
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Peculiar Near-Earth Objects

2005
In this paper we present visible and near-infrared spectroscopy of 7 peculiar NEOs. These objects have been observed within the SINEO (Spectral Investigation of Near-Earth Objects) survey, which have produced more then 100 spectra of NEOs. Among the objects presented here, five of them result to be spectrally peculiar, belonging to the rare V and R ...
MARCHI, SIMONE, LAZZARIN, MONICA, MAGRIN, SARA   +2 more
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Near Earth Objects - a threat and an opportunity

Physics Education, 2003
In the past decade the hazard posed to the Earth by Near Earth Objects (NEOs) has generated considerable scientific and public interest. A number of major films, television programmes and media reports have brought the issue to public attention. From an educational perspective an investigation into NEOs and the effects of impacts on the Earth forms a ...
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ExploreNEOs: The Warm Spitzer Near Earth Object survey

2011
We are carrying out the ExploreNEOs project in which we observe more than 600 near Earth Objects (NEOs) at 3.6 and 4.5 microns with Warm Spitzer. For each NEO we derive diameter and albedo. We present our results to date, which include studies of individual objects, results for our entire observed sample, and, by extrapolation, results for the entire ...
Trilling, D. E., Hora, J. L, Mueller, M., Thomas, C. A., Harris, A. W., Hagen, A. R., Mommert, M., Benner, L., Bhattacharya, B., Bottke, W. F., Chesley, S., Delbo, M., Emery, J. P., Fazio, G., Kistler, J. L., Mainzer, A., Morbidelli, A., Penprase, B., Smith, H. A., Spahr, T. B., Stansberry, J. A.   +20 more
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Spitzer observations of Near Earth Objects

Bulletin of the American Astronomical Society, 2017
The Spitzer Space Telescope has proven to be a powerful tool to measure the diameters and albedos of Near Earth Objects. We have completed two major Spitzer NEO surveys (ExploreNEOs and NEOSurvey) and are in the middle of a culiminating third survey (NEOLegacy), with a total target list across all three programs of 2175 previously known NEOs. We report
Trilling, David E., Hora, Joseph L., Mommert, Michael, Chesley, Steven R., Emery, Joshua P., Fazio, Giovanni G., Harris, Alan, Mueller, Michael, Smith, Howard Alan   +8 more
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