Results 141 to 150 of about 1,238 (178)
Some of the next articles are maybe not open access.
Search for Aqueously Altered Materials on Asteroids
Icarus, 1998Abstract The analysis of visible and near-infrared reflectance spectra of C-class objects has revealed the presence of features that appear to indicate a history of aqueous alteration on their surfaces. This result can provide constraints on our understanding of the early Solar System.
Alain Doressoundiram +7 more
openaire +3 more sources
Asteroid Scare Provokes Soul-Searching [PDF]
Science, 1998 SCIENCE AND THE PRESSLast week, astronomers created a media storm by announcing that an asteroid could collide with Earth in 2028, only to revise the estimates hours later. To head off future false alarms, some astronomers are now calling for word of such threats to first go out to a small community of colleagues so they can come to a consensus before ...
openaire +1 more source
Search techniques for near-Earth asteroids
Vistas in Astronomy, 1990Knowledge of the near-earth asteroids (Apollo, Amor, and Aten groups) has increased enormously over the last 10 to 15 years. This has been due in large part to the success of programs that have systematically searched for these objects. These programs have been motivated by the apparent relationships of the near-earth asteroids to terrestrial impact ...
E.F. Helin, R.S. Dunbar
openaire +2 more sources
Comets and asteroids: searches and scares
Advances in Space Research, 2004Abstract Concern that the Earth might be struck by a comet, with potentially devasting consequences, dates back some two centuries. With the growing appreciation in the twentieth century that asteroidal impacts are also a danger, search programs have been devised in the hope of discovering a specific hazard at least decades, and probably centuries or
openaire +2 more sources
Asteroid families—An initial search
Icarus, 1992A stereo examination was conducted for clusters in three-dimensional proper element space within a sample of both numbered and faint Palomar-Leiden Survey (PLS) asteroids. The clusters were then objectively filtered for small Poisson probability of chance occurrence; 104 were accepted as families with 4- to 12-member populations, and are interpreted as
openaire +2 more sources
A Search for Young Asteroid Pairs with Close Orbits
Solar System Research, 2020We analyzed the dynamic evolution of a number of young asteroid pairs in close orbits in order to constrain their ages. Several methods of pair selection and estimation of their age are used: analysis of convergence of orbital elements; estimation of the Kholshevnikov metrics in the space of Keplerian orbital elements; estimation of relative distances ...
Eduard Kuznetsov +4 more
openaire +2 more sources
SST asteroid search performance 2014–2017
2018 IEEE Aerospace Conference, 2018From 2014 to 2017, the Lincoln Near-Earth Asteroid Research (LINEAR) program performed wide-area asteroid search using the 3.5-m Space Surveillance Telescope (SST) located on Atom Peak at White Sands Missile Range, N.M. The SST was developed by MIT Lincoln Laboratory (MIT/LL) for the Defense Advanced Research Projects Agency (DARPA) to advance the ...
Mark E. Cornell +3 more
openaire +2 more sources
A new asteroid observation and search technique
Publications of the Astronomical Society of the Pacific, 1981A prototype observatory was constructed near Socorro, New Mexico to search for and observe earth-approaching asteroids. Hardware modifications were made so that the discrimination of artificial satellites at an angular speed of 15 arcsec/sec can be used to observe minor planets at an angular speed of 0.01 arcsec/sec.
openaire +2 more sources
Asteroid search operations with the space surveillance telescope
2016 IEEE Aerospace Conference, 2016Over the past two years, the Lincoln Near Earth Asteroid Research (LINEAR) program, funded by the National Aeronautics and Space Administration (NASA), has transitioned to asteroid search operations using the new 3.5-meter wide-field-of-view Space Surveillance Telescope (SST) located at the Atom Site on White Sands Missile Range, N.M.
Grant H. Stokes +5 more
openaire +2 more sources
Search for solar wind–asteroid interactions at Eros
Advances in Space Research, 2004The solar wind interaction with the asteroid 433 Eros is investigated using magnetometer data from the NEAR-Shoemaker spacecraft. From February 2000 to February 2001 NEAR-Shoemaker orbited Eros in nearly circular orbits having radii of 200, 100, 50 and 35 km.
Mario H. Acuña, Brian J. Anderson
openaire +2 more sources