Results 151 to 160 of about 447,866 (197)

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
openaire   +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   +1 more source

Next generation near earth object surveys

2009
Since its formation the Earth, as well as all the bodies of the Solar System, have been bombarded by cosmic debris whose size varies between a fraction of a millimiter and tens of km. The frequency of these impacts depends on the projectile's dimension and dynamical state; their computed characteristic timescales are, respectively, between minutes and ...
openaire   +2 more sources

Near-Earth Object Surveyor Overview

2022 IEEE Aerospace Conference (AERO), 2022
Tom Hoffman, Yuanming Liu, Mark Lysek, Alexander Murray, Erik Nilsen, Pavani Peddada, Mark Rokey, Mar Vaquero, Amy Mainzer, Andre Wong, Timothy Sayer, Paul Snider, Michael Veto   +12 more
openaire   +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

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
openaire   +4 more sources

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
openaire   +1 more source

MISSIONS TO NEAR-EARTH OBJECTS

2021
ANDREW F. CHENG, J. VEVERKA, C. PILCHER, ROBERT W. FARQUHAR   +3 more
openaire   +1 more source

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   +1 more source

NEAR-EARTH OBJECT INTERCEPTION WORKSHOP

2021
GREGORY H. CANAVAN, JOHNDALE C. SOLEM, JOHN D. G. RATHER   +2 more
openaire   +1 more source