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2501. Keywords_120
Short-Period Comets: Origin and Terrestrial Impact Hazard . ... The model is consistent with the basic observed distributions of near-parabolic comets, short-period comets, Centaurs and high-eccentricity trans-Neptunian objects.This model requires that initial objects in the early Solar System are concentrated to the outer planetary region, and the physical lifetime of comets in the inner planetary region at the present epoch is an increasing function of initial perihelion distances. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/120.htm -- 4.3 Кб -- 02.10.2012
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2502. Keywords_115
KLENOT Project - Contribution to Follow-up Astrometry of PHAs and VIs . ... The KLENOT project is aimed especially to do so. ... Very Long Baseline Interferometry (VLBI), KLENOT project, Near Earth Objects (NEOs), professional NEO follow-up programs, follow-up astrometry of PHAs and VIs, Solar System science, asteroid and comet hazard, NEO discovery, precise orbit computation, judging of future close encounters with the Earth, possible impact solutions. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/115.htm -- 3.9 Кб -- 02.10.2012
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2503. Keywords_107
Analysis of the Systematic Errors of CCD-observations of Asteroids Performed in 2007-2008 . ... Analysis of systematic errors based on CCD-observations taken with Normal Astrograph (D/F = 0.33 m/3.5 m, FOV = 18 16 arcmin, scale = 1 arcsec/pix) of Pulkovo observatory during 2007-2008 has been made. ... A statistical approach that used mean (O-C) values obtained for positions of reference stars within the field of view separated on square bins and magnitude ranges was applied. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/107.htm -- 3.8 Кб -- 02.10.2012
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2504. Keywords_102
Database Development for Solar System Small Bodies' Orbital Evolution Based on Modern Mathematical Models and Methods . ... Research of the orbital evolution of 6163 asteroids belonging to Apollo, Amor, Aten groups and 197 short-period comets was performed for the time period from 1800 to 2206. 815 objects have been identified among asteroids approaching closely to inner planets, in particular 612 objects passing through the Earth's sphere of action. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/102.htm -- 4.5 Кб -- 02.10.2012
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2505. Keywords_84
Automatic Detection of NEOs in CCD Frames . ... CCD frames obtained with modern telescopes with robotic operation allow carrying out standard observation programs for detection of peculiar objects on stellar backgrounds, as is the case of Near Earth Objects (NEOs). ... In this paper, we present original algorithms for automatically detecting dim NEO images in telescope frames, considering both sidereal and differential tracking [2]. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/83.htm -- 4.7 Кб -- 02.10.2012
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2506. Keywords_95
The Small Libration of the Satellite in the System of the Asteroid 39 Laetitia . ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), near-Earth asteroids (NEAs), small libration of the satellite , Asteroid 39 Laetitia , Crimean astrophysical observatory (CrAO), to automate the observation process, method of frequency analysis , periodicity of changes of asteroid brightness, binary asteroid , binary system , period of axial rotation of components, a satellite ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/95.htm -- 5.5 Кб -- 02.10.2012
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2507. Keywords_90
YORP: Influence on Rotation Rate . ... We have developed a semi-analytical model for calculating angular acceleration of asteroids due to Yarkovsky O'Keefe Radzievskii Paddack (YORP) effect. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), near-Earth asteroids (NEAs), rotation rate, calculating angular acceleration of asteroids, Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, elliptic orbits, thermal inertia of the asteroid's surface, the asteroid 1620 Geographos. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/90.htm -- 4.0 Кб -- 02.10.2012
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2508. Keywords_84
Automatic Detection of NEOs in CCD Frames . ... CCD frames obtained with modern telescopes with robotic operation allow carrying out standard observation programs for detection of peculiar objects on stellar backgrounds, as is the case of Near Earth Objects (NEOs). ... In this paper, we present original algorithms for automatically detecting dim NEO images in telescope frames, considering both sidereal and differential tracking [2]. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/84.htm -- 5.2 Кб -- 02.10.2012
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2509. Keywords_79
Databases for Observations and Orbit Elements for Asteroids and Comets in ERA System . ... In the present paper the databases for both observations and elements of asteroids and comets in the ERA system are described, as well as examples of the orbit determination and the processing of observations for these objects. The peculiarities of computations are described and examles of usage of the ERA system for orbit determination are presented. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/79.htm -- 4.5 Кб -- 02.10.2012
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2510. Keywords_75
Improving the Orbital Parameters of Phobos and Deimos by Using the Universal Programming Complex ERA . ... The ERA system was used for developing the numerical dynamical theory of Phobos and Deimos. ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), Phobos, Deimos, improving the orbital parameters, Universal Programming Complex ERA, Martian satellite dynamics, the numerical dynamical theory, the secular acceleration, database of the satellites observations. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/75.htm -- 3.8 Кб -- 02.10.2012
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2511. Keywords_70
Determination of an Intermediate Perturbed Orbit from Range and Range Rate Measurements at Three Time Instances . ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), an intermediate perturbed orbit, a fourth-order tangency to the trajectory of perturbed motion, range measurements, range rate measurements, range observations, range rate observations, computing the preliminary orbit of a small celestial body, the degree of approximation of the real motion, the Keplerian orbit. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/70.htm -- 3.9 Кб -- 02.10.2012
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2512. Keywords_65
Method for High-accuracy Determinations of Orbits of Small Bodies from Three Observations . ... A new method is suggested for finding the preliminary orbit of a small celestial body from three pairs of angular measurements of its position at three moments. ... The methodical error of orbit computation by the proposed method is generally three orders smaller than the corresponding error of the traditional approach based on the construction of the unperturbed Keplerian orbit . ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/65.htm -- 3.9 Кб -- 02.10.2012
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2513. Keywords_62
The Sizes of Impact Craters and Ejecta Spots on Asteroids . ... The formation of ejecta during the cratering process is characteristic for meteoritic impacts. On a simple impact model, analytic expression for a size of impact crater and ejecta spot are derived. ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), asteroids, an impact model, meteoritic impacts, cratering process, impact craters, ejecta spots. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/62.htm -- 3.3 Кб -- 02.10.2012
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2514. Keywords_58
Detection of the YORP Effect from Photometric Observations of Near-Earth Asteroids . ... In this report we present summary of photometric observations of near-Earth asteroids (NEAs) obtained to search for YORP effect. ... Observations of 1620 Geographos in 2008 and 3103 Eger in 2009 are used to detect the acceleration of the asteroids rotation rates in agreement with the computed theoretical values due to YORP effect. Now there are four asteroids with the YORP effect detected. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/58.htm -- 5.1 Кб -- 02.10.2012
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2515. Keywords_55
Estimates for the Set-theoretic Distance between Orbits of Celestial Bodies . ... It is reasonable to use preliminary simple criteria for the proximity to intersection based on estimates of set-theoretic distance ( , 0 ) between orbits , 0 of celestial bodies , 0 . ... We describe here two simple criteria and one more complicated one. ... The third one requires calculation of the distance itself and it amounts to solving a trigonometric equation of the 8-th degree. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/55.htm -- 4.3 Кб -- 02.10.2012
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2516. Keywords_49
Results of Photometric Observations of Potentially Hazardous Asteroids . ... 1 Scientific Research Institute Crimean Astrophysical Observatory, Nauchnyj, Ukraine 2 V. N. Karazin Kharkiv National University, Kharkiv, Ukraine 3 Keldysh Institute of Applied Mathematics of RAS, Moscow, Russia Abstract: . ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), photometric observations, CCD observations, potentially hazardous asteroids, Simeiz observatory. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/49.htm -- 3.5 Кб -- 02.10.2012
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2517. Keywords_46
Masses of asteroids 10 Hygiea and 152 Atala obtained by the dynamical method . ... Masses of asteroids 10 Hygiea and 152 Atala have been obtained by the dynamical method. ... m 152 = 1.34 0.27 (10 -11 Sun )]. ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), mass of asteroids 10 Hygiea, mass of asteroids 152 Atala, the dynamical method, perturbing asteroids, the additional acceleration, the Yarkovsky effect, elimination of erroneous observations, optical observations. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/46.htm -- 4.2 Кб -- 02.10.2012
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2518. Keywords_43
Spots on Asteroids as Evidence of Collisions . ... It was used for investigations of sizes of hydro-silicate spots on the surfaces of asteroids 21 Lutetia and 4 Vesta. ... Spots are the result of small body collisions. ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), hydro-silicate spots on asteroids, evidence of small body collisions, the spectral-frequency method (SFM), asteroid 21 Lutetia, asteroid 4 Vesta. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/43.htm -- 3.7 Кб -- 02.10.2012
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2519. Keywords_32
AMPLE 3 ? Multi-purpose Software Package for Asteroids and Comets . ... Institute of Applied Astronomy of RAS, St. Petersburg, Russia Abstract: . An integrated multi-purpose software package AMPLE 3 for dealing with asteroids and comets is described. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), Small Solar System Body (SSSB), AMPLE 3, an integrated multi-purpose software package, asteroids, comets. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/32.htm -- 3.3 Кб -- 02.10.2012
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2520. Keywords_29
Electrolysis of Ices as a Key to Understanding of the Minor Bodies' Nature . ... The electrolysis of dirty ices constituting massive envelopes of Ganymede-like bodies is shown to be crucial for understanding of (explosive) origin and manifestations of different types of minor bodies and related objects in the inner Solar System. ...
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Ссылки http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/29.htm -- 3.9 Кб -- 02.10.2012
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