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2481. Keywords_237
Influence of Asteroids and Trans-Neptunian Objects on the Motion of Major Planets and Masses of the Asteroid Main Belt and the TNO Ring . ... Perturbations from asteroids and Trans-Neptunian Objects (TNOs) produce a significant effect on the orbits of planets and should be taken into account when high-accuracy planetary ephemerides are constructed. On the other hand, from an analysis of motion of the major planets some physical parameters of the asteroids and TNOs may be obtained. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/237.htm -- 4.6 Кб -- 02.10.2012
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2482. Keywords_233
Georadar and Hydrogen Studies of the Tunguska Meteorite Craters . ... 1 Troitsk Institute for Innovation and Fusion Research, Troitsk, Moscow region, Russia 2 Institute of the Earth Magnetism and Propagation of Radio Waves of RAS, Troitsk, Moscow region, Russia 3 Complex Self-made Surgut Expedition, Surgut, Russia Institute of Computational Mathematics and Mathematical Geophysics of RAS, Novosibirsk, Russia Abstract: . Tunguska meteorite craters were studied during July 7 22, 2009. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/233.htm -- 4.1 Кб -- 02.10.2012
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2483. Keywords_228
Expert Database on the Earth Impact Structures . ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), Earth Impact Structures (EDEIS), Expert Database, Earth Impact Database, the degree of confidence of impact origin, validity index V, classification of structures over the validity index, impact criteria, morphological impact criteria level, geological impact criteria level, petrological impact criteria level, mineralogical impact criteria level. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/228.htm -- 4.7 Кб -- 02.10.2012
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2484. Keywords_222
... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), a body moving in a planet atmosphere, aerodynamic loads, the forces of inertia, heat flux, ablation, the Lam? equations, the nature of the destruction of the body , the altitude of destruction for well-known meteoroids, composition and space velocities, flight of small fragments , thermoelastic forces , the process of destruction , the fragment's size , the ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/222.htm -- 4.9 Кб -- 02.10.2012
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2485. Keywords_216
Hydrocode Modeling of a High-velocity Impact of an Asteroid Particle on a Steel Surface . ... Present work deals with physical-mathematical modeling of hyper-velocity impacts up to 80 km/s. This problem is very important for asteroid protection systems and other critical nuclear and military objects. ... As a result of modeling, new models and criteria of extreme states of solids will be developed to describe hyper-velocity impacts. ... The LS-DYNA 3D hydrocode was used. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/216.htm -- 4.5 Кб -- 02.10.2012
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2486. Keywords_211
Prospective Zones of Damage Caused by the Popigai Impact Event . ... The Popigai impact event occurred about 36 Ma ago, and had not produced a global catastrophe and extinction. Several concentric zones of damage in which intensity decreases with the distance from the impact site may be reconstructed and evaluated in rankings ranging from 10 (evaporation, target perturbation) to 1 (mostly dust settling). ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/211.htm -- 3.5 Кб -- 02.10.2012
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2487. Keywords_206
Detection of Possible Impact Structures at the Bottom of the Ocean by Gravimetric and Magnetometric Data Processing . ... 1 The Institute of Computational Mathematics and Mathematical Geophysics of RAS, Novosibirsk, Russia 2 The Institute of Computational Modeling of RAS, Krasnoyarsk, Russia 3 Siberian Federal University, Krasnoyarsk, Russia Abstract: . A new attempt to detect hidden impact craters on the Earth surface and on ocean bottoms was made using high-tech computational methods. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/206.htm -- 4.0 Кб -- 02.10.2012
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2488. Keywords_200
Consequences of Impacts of Cosmic Objects in Circumstances of Changing Climate . ... The consequences of the impacts of asteroids about 1 km in size on the Earth are considered from the viewpoint of their negative effects under conditions when the climate changes. These effects are ejection of greenhouse gases, fires, changes in surface albedo, and global dispersion of asteroid material. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/200.htm -- 4.1 Кб -- 02.10.2012
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2489. Keywords_189
In Searching for Comet P/Tunguska-1908 . ... It finds explanation, however, in the New Explosive Cosmogony of minor bodies as having been caused by an explosion of a part ( up to 10 12 g) of the comet nucleus whose ices contained products of their electrolysis, 2H 2 + O 2 . ... Back integration of its orbit without allowing for non-gravitational effects suggests that it had passed the Earth on June 27, 1908 at a distance of 0.0659 AU. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/189.htm -- 4.9 Кб -- 02.10.2012
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2490. Keywords_184
Atmospheric Discharge in the Tunguska Disaster . ... Based on the fact that an explosion of the Tinguska cosmic body, which caused trees to fall over a wide area, and radiant energy release during the Tunguska disaster were separated in space and in time, it is proposed that these events are interrelated but of different origin. We propose that the emission during the Tunguska disaster was caused by an atmospheric discharge at altitudes of 10-90 km above the Earth's surface. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/184.htm -- 3.8 Кб -- 02.10.2012
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2491. Keywords_179
The Tunguska Catastrophe is the Consequence of a Series of Explosions of Comet Nucleus Fragments . ... For the first time in history of Tunguska research the generalized concept of all essential phenomena starting with the most probable origin of tandem comet nucleus fragments intruding into the Earth's atmosphere up to the detonation of these products and the disintegration and meteorological, climatic, atmospheric, and geomagnetic consequences of this event is presented. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/179.htm -- 4.0 Кб -- 02.10.2012
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2492. Keywords_174
Modern Dynamic Methods of Determination of Parameters of Meteor Bodies . ... The study takes an approach in modelling the fireballs' mass and other properties from the rate of body deceleration in the atmosphere as opposed to conventionally used luminosity. An analytical model of the atmospheric entry is calculated for registered fireballs using published observational data and evaluating parameters describing drag and ablation of meteors and bolides along the luminous segment of the trajectory. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/174.htm -- 4.0 Кб -- 02.10.2012
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2493. Keywords_168
Meteor Streams: the Relation to Hazardous Celestial Bodies . ... Analytically tractable, the evolution of meteor particles' elliptic orbits in a gravitational field of the Sun is considered in view of light pressure, the Poynting Robertson effect, and the corpuscular analogue of Poynting Robertson effect. ... In the context of the perturbed two-body problem, the criterion for the probable meteor particles parent bodies are identified. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/168.htm -- 4.7 Кб -- 02.10.2012
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2494. Keywords_164
Origin and Dynamic Evolution of Meteor Complexes in the Problem of Asteroid-Comet Hazard . ... The life cycle of a comet and its meteoroid complex from discovery to its last return with no time gap is reconstructed using computer technology. Simulation results of comeraty nucleus disintegration, meteoroid complex and its position in the near solar space with consideration for Keplerian and disturbed motion are analyzed and compared with observational data. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/164.htm -- 3.7 Кб -- 02.10.2012
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2495. Keywords_157
From the Tunguska Space Body to the Evolution of the Protoplanetary Nebula . ... A model for the structure of comet nuclei is proposed based on the results of the investigations of carbonaceous substances from the epicenter of the Tunguska cosmic body (TCB) explosion. ... Editorial note: This paper suggests several new ideas about the solar nebula and the formation and composition of comet nuclei based on investigations of the Tunguska event. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/157.htm -- 4.7 Кб -- 02.10.2012
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2496. Keywords_152
Electronic Catalogue of Comets "Halley" . ... In this paper we give a description of the Electronic Catalogue of Comets "Halley", which makes it possible to calculate the evolution of the orbits of comets, to visualize orbital motion, to determine the circumstances of a comet's close approach to planets within a given time interval, as well as a number of other opportunities. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/152.htm -- 4.3 Кб -- 02.10.2012
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2497. Keywords_146
... comet nucleus. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), cometary families , terrestrial type planets, collidings, transition of a comet nucleus , initial heliocentric parabolic orbit, heliocentric elliptical trajectory, a pairwise three dimensional two-body problem, the Sun - comet nucleus , terrestrial planet - comet nucleus , orbital parameters of a nucleus , sphere of influence of a ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/146.htm -- 5.2 Кб -- 02.10.2012
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2498. Keywords_139
Variation of Nongravitational Parameters for Comet Encke as a Result of its Decay . ... To account for decrease of nongravitational parame-ters three variants of physical processes are proposed: 1) deposition of a substantial nonvolatile mass not impeding the sublimation; 2) generation of a little-massive mantle shrinking the effective area linearly; 3) generation of a little-massive mantle shrinking the area exponentially. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/139.htm -- 4.0 Кб -- 02.10.2012
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2499. Keywords_134
Nongravitational Effects on Cometary Motion due to Jupiter . ... The problem of linking cometary apparitions before and after the approach of a comet to Jupiter was investigated. A hypothesis of possible existence of additional acceleration, perturbing the motion of comets in the vicinity of Jupiter, was considered. This nongravitational perturbation is described by a function of the jovicentric distance, written in a standard "force law" form. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/134.htm -- 4.5 Кб -- 02.10.2012
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2500. Keywords_129
Method of Calculating Cometary Orbits . ... A method of constructing a numerical theory of comet motion covering large intervals of time is presented. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), calculating cometary orbits, numerical theory of comet motion covering large intervals of time , radial component of non-gravitational acceleration , transverse component of non-gravitational acceleration , normal component of non-gravitational ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/129.htm -- 4.5 Кб -- 02.10.2012
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