Results 281 to 290 of about 639,811 (317)

Impacting small Near Earth Objects

Advances in Space Research, 2008
Abstract The design of a low-cost spacecraft to impact on a small, faint Near Earth Object (NEO), poses major challenges. This paper focuses on the terminal phase of such impact mission, analyzing the capability of autonomous Guidance, Navigation and Control (GNC) systems to compensate the deviations in the impact point to achieve a successful ...
J. Gil-Fernández, C. Corral, R. Panzeca
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Spectroscopic investigation of Near-Earth Objects

2004
International ...
Vernazza, Pierre, Fulchignoni, Marcello, Birlan, Mirel   +2 more
openaire   +3 more sources

Near Earth object mitigation studies

2016 IEEE Aerospace Conference, 2016
Early detection of an object on a collision course with Earth, leading to well-considered and effective measures to mitigate its hazards, is not always possible due to a number of extenuating factors. NASA and the Department of Energy (DOE)'s National Nuclear Security Administration (NNSA) have partnered to develop a full systems framework for ...
Mark Boslough, Chaowei Yang, Fabien Raccah, Myra Bambacus, Ron Leung, Bernard D. Seery, Kevin Greenaugh   +6 more
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Binary Asteroids in the Near-Earth Object Population

Science, 2002
Radar images of near-Earth asteroid 2000 DP107 show that it is composed of an ∼800-meter-diameter primary and an ∼300-meter-diameter secondary revolving around their common center of mass. The orbital period of 1.755 ± 0.007 days and semimajor axis of 2620 ± 160 meters constrain the total mass of the system to 4.6 ± 0.5 × 10 11
Margot, J. L., Nolan, M. C., Benner, L. A. M., Ostro, S. J., Jurgens, R. F., Giorgini, J. D., Slade, M. A., Campbell, D. B.   +7 more
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A Near‐Earth Object Hazard Index

Annals of the New York Academy of Sciences, 1997
ABSTRACT: With the advent of expanded near‐Earth object (NEO) surveys, the number of known close approaches to Earth will increase dramatically. For many of these objects, uncertainties in their preliminary orbits will result in calculations yielding nonzero probabilities of collision over the next century. An index system is proposed which places the
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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 García Yárnoz, Martin Stasko   +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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Gaia Astrometry of Near-Earth Objects

2011
International ...
Hestroffer, Daniel, Bancelin, David, Thuillot, William, Tanga, Paolo   +3 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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STUDY OF NEAR EARTH OBJECTS

SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2020
Marina Sokolova, Maria Sergienko, Yury Nefedyev, Zoya Andreeva, Alexey Andreev   +4 more
openaire   +1 more source