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2461. Keywords_381
Rotational Mass Driver ? an Efficient NEO Deflection Concept . ... This paper explores the possibility of using the same method for asteroid deflection. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), rotational mass driver, NEO deflection concept, method for asteroid deflection, high precision, controllability, wide applicability range, binaries, rubble piles, large objects, direct collision course, efficient to nuclear methods. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/381.htm -- 4.1 Кб -- 02.10.2012
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2462. Keywords_376
About Measures on Minimization of Damage from Collisions with Asteroids and Nuclei of Comets . ... A Forecasting Service is necessary for this purpose. ... These methods should model the consequences of impacts. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), dangerous celestial bodies, minimization of damage from collisions, asteroids, nuclei of comets, rather small bodies, Tunguska, Forecasting Service, to forecast areas of impacts, to mitigate consequences of impacts. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/376.htm -- 4.5 Кб -- 02.10.2012
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2463. Keywords_369
Design Parameters and Efficiency of a Space System for Warning about Small Celestial Bodies Approaching the Earth along Collision Trajectories . ... tracking of an earlier detected hazardous celestial body (HCB) for synchronous-basic position measurements. The space telescopes (ST) would be placed at a long distance (such as 5 10 7 km) from the Earth to provide for detecting small (100 m) celestial bodies when they are moving to the Earth from the sunward direction. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/369.htm -- 4.8 Кб -- 02.10.2012
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2464. Keywords_362
The Level of Rapid Response Reaction of the Planetary Defense System . ... a level for rapid response reaction (RRR) and a level for deliberate and well-planned reaction ? ... This article reviews results for the development of RRR principal components: a reconnaissance spacecraft and intercepting spacecraft. The reconnaissance spacecraft is intended for investigation of dangerous celestial bodies (DCBs), the intercepting spacecraft for their deflection or destruction. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/362.htm -- 4.4 Кб -- 02.10.2012
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2465. Keywords_347
Description of a NASA Study to Deflect Hazardous Asteroids . ... In January 2007 this author served as Principal Investigator (P. I.) for the Kinetic Deflection of NEOs during a Study conducted by NASA at the Marshall Space Flight Center (MSFC) in Huntsville, Alabama, USA. ... Nuclear Deflection, achieved by virtue of a B83 nuclear warhead (Prof. John Remo of Harvard University served as P. I. for this nuclear deflection study); . ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/347.htm -- 5.1 Кб -- 02.10.2012
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2466. Keywords_337
... Hyper-velocity kinetic impactors require intercept missions. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), countermeasures , potentially hazardous objects (PHOs), asteroids, comet nuclei, a collision course with Earth, hyper-velocity impacts, surface and subsurface conventional explosions , stand-off nuclear explosions , surface nuclear explosions , subsurface nuclear explosions , momentum transfer, complete deflection of a PHO , destruction of a ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/337.htm -- 5.6 Кб -- 02.10.2012
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2467. Keywords_327
Estimating the NEO Population and Impact Risk: Past, Present and Future . ... The detailed analyses of the 2003 NASA SDT report estimated a "persons affected" rate of ~182 per year associated with impact tsunami. ... Here we re-evaluate the impact hazard, using our new population and completion estimates, and revised "kill curves" including the airburst damage down to smaller size and lower tsunami fatality rate. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/327.htm -- 4.9 Кб -- 02.10.2012
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2468. Keywords_312
Estimating the NEO Population and Impact Risk: Past, Present and Future . ... Since most of the risk resides in the largest impactors, finding that fraction of the largest bodies, and that none of them has a significant chance of impacting in the next century or so, "retires" more than 90 % of the impact risk, including most of the risk of a globally catastrophic impact event. ... In the mid-size range, from ~150 m to ~1 km, the main risk is from tsunami generated by an ocean impact. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/312.htm -- 6.9 Кб -- 02.10.2012
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2469. Keywords_305
The Study of the Probability of an Asteroid Collision with a Planet by Monte Carlo Method . ... The close approach of asteroid (99942) Apophis to the Earth on April 13, 2029, and 2007 WD5 to Mars on January 30, 2008, have been researched taking into account the sets of observations giving maximal estimates of encounter probability. Our estimates of probability obtained by the Monte Carlo method resemble those published on the web site of JPL, NASA. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/305.htm -- 3.8 Кб -- 02.10.2012
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2470. Keywords_302
Impact Solutions for Asteroid (101955) 1999RQ 36 . ... Impact solutions for asteroid (101955) 1999 RQ 36 are presented for different models of the Solar System and with and without the Yarkovsky effect. Also the impact orbit of asteroid for 2185 has been computed. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), impact solutions, impact orbit of asteroids, asteroid (101955) 1999RQ 36 , models of the Solar System, the Yarkovsky effect. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/302.htm -- 3.4 Кб -- 02.10.2012
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2471. Keywords_299
. Paths of Risk of Selected Dangerous Asteroids . I. W odarczyk . Chorz w Astronomical Observatory, Chorz w, Poland Abstract: . The paths of risk (corridors of risk) computed by the author for Apophis impact in 2036 and for 2007HJ impact in 2077, taken from Impact Risk Page of the NASA, are presented. Key words: . Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), the paths of risk (corridors of risk), Apophis impact in 2036, 2007HJ impact in 2077, Impact Risk Page of the NASA.
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/299.htm -- 3.3 Кб -- 02.10.2012
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2472. Keywords_294
Estimating the Accuracy of Asteroid Ephemerides Using the Bootstrap Method . ... We apply the bootstrap method to two NEOs: Toutatis and Apophis. We provide an estimate of the accuracy of their ephemerides and an estimate of the accuracy of their next close approach to Earth. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), accuracy of asteroid ephemerides, the bootstrap method, Toutatis, Apophis, close approach to Earth. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/294.htm -- 3.7 Кб -- 02.10.2012
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2473. Keywords_289
The Yarkovsky Effect in the Motion of NEAs . ... In this paper we evaluate the Yarkovsky effect on the motion of NEAs under the assumption that this acceleration depends on heliocentric distance as 1/r 2 and is characterized by the transverse component 2 in the orbital coordinate system. ... In some instances the Yarkovsky effect can be estimated by using only optical observations. Accounting for the Yarkovsky effect permits to include more optical observations in the orbit fitting process. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/289.htm -- 4.1 Кб -- 02.10.2012
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2474. Keywords_284
Methods of Computing Impact Orbits . ... Chorz w Astronomical Observatory, Chorz w, Poland Abstract: . The methods of computing impact orbits with the use of the free OrbFit v.4.0 software [ http://adams.dm.unipi.it/~orbmaint /orbfit/ ] are described. ... Very Long Baseline Interferometry (VLBI), computing impact orbits, OrbFit v.4.0 software, Chorz?w Astronomical Observatory. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/284.htm -- 3.4 Кб -- 02.10.2012
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2475. Keywords_279
About Zones of Resonant Returns of Asteroid Apophis . ... Asteroid Apophis is one of extremely dangerous NEOs. ... Using analytical and numerical tools, we investigate the loss of precision after the Earth approach in 2029 and the possible approach in 2036. ... Possible trajectories of collisions with the Earth have been found analytically and numerically in this chaotic region. To construct these trajectories we used quasi-random intermediate motions, made up from resonant collision orbits. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/279.htm -- 4.3 Кб -- 02.10.2012
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2476. Keywords_272
How Precise is the Orbit of (99942) Apophis and how Probable is its Collision with the Earth in 2036? ... At present the orbit of asteroid (99942) Apophis and the forces acting on it are not known with sufficient accuracy to predict with certainty its motion after the close approach to the Earth in April of 2029. As a result of this approach the current heliocentric orbit of the asteroid will be changed by Earth's gravity. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/272.htm -- 4.1 Кб -- 02.10.2012
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2477. Keywords_268
The Orbital Evolution of 2007 VA85, an Amor-type Asteroid on a Retrograde Orbit . ... Among the known population of asteroids on retrograde orbits ( i 90 ) we found an object classified as an Amor-type asteroid. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), population of asteroids on retrograde orbits, an Amor-type asteroid, possible Earth-impact solutions, potentially hazardous object, orbital evolution of 2007 VA85, dynamical origin. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/268.htm -- 4.0 Кб -- 02.10.2012
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2478. Keywords_262
... First, we computed the mean errors of orbit parameters on the assumption of the linear connection of them with observation errors and then we compared obtained estimates with those resulting from the assumption of the nonlinearity of this connection. Secondly, we correlate orbital parameters and their errors obtained by the method of the least modulus with those obtained by the least-squares method. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/262.htm -- 4.2 Кб -- 02.10.2012
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2479. Keywords_255
Demands on Observation Campaigns for Accurate Predictions . ... Accurate predictions of close encounters require optimum times of observations, positions with dependences, and rigorous least squares adjustment accounting for correlations. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), accurate predictions of close encounters, demands on observation campaigns, optimum times of observations, positions with dependences, least squares adjustment accounting for correlations. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/255.htm -- 3.3 Кб -- 02.10.2012
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2480. Keywords_244
NASA's Near-Earth Object Program Office . ... This paper briefly presents the history, interactions and current activities of NASA's Near-Earth Object Program Office. The Program Office utilizes near-Earth object (NEO) astrometric data from the international community, received from the Minor Planet Center, to refine orbits and provide predictions for coming Earth close approaches. ... Recent studies of some of the issues surrounding the deflection of an Earth threatening NEO are also described. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/244.htm -- 4.3 Кб -- 02.10.2012
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