Results 321 to 330 of about 584,066 (367)

Low Energy, Low-Thrust Capture of Near Earth Objects in the Sun-Earth and Earth-Moon Restricted Three-Body Systems

, 2014
In this paper a method to retrieve asteroids incorporating low-thrust propulsion into the invariant manifolds technique is investigated. Assuming that a tugboat-spacecraft is in a rendez-vous condition with the candidate Near Earth Object (NEO), the aim ...
G. Mingotti, Joan-Pau Sanchez, C. McInnes   +2 more
semanticscholar   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources

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 ...
openaire   +2 more sources

A New Approach to Calculation of Secular Frequencies in the Dynamics of Near-Earth Objects in Orbits with Large Eccentricities

, 2020
A. Aleksandrova, T. Bordovitsyna, N. Popandopulo, I. Tomilova   +3 more
semanticscholar   +1 more source

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
openaire   +4 more sources

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

Near Earth Objects and Their Physical Characterization

2018
The present research on Near Earth Objects (NEOs) is mostly limited on addressing the question on their number and how hazardous they may be to the Earth. Catalina Sky Survey (CSS) has submitted thousands of astrometric observations to the Minor Planet Center (MPC) resulting in discovery of hundreds of NEOS but much of their physical characteristics ...
openaire   +2 more sources

Dynamical evolution of near-Earth objects

An apparent discrepancy between the number of observed near-Earth objects (NEOs) with small perihelion distances (q) and the number of objects that models predict, has led to the conclusion that asteroids get destroyed at non-trivial distances from the Sun.
Athanasia Toliou, Mikael Granvik
openaire   +2 more sources

Infrasound Monitoring as a Tool to Characterize Impacting Near-Earth Objects (NEOs)

Infrasound Monitoring for Atmospheric Studies, 2018
E. Silber, P. Brown
semanticscholar   +1 more source