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Nonlinearity in Inverse Problems of Asteroid Dynamics Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 V. A. Avdyushev, O. M. Syusina, V. A. Tamarov
Abstract A collision of an asteroid with the Earth in the future is always considered as a probabilistic event because the asteroid orbit determined from observations with random errors inevitably contains an uncertainty in its parameters. To establish the probability of collision, the parametric uncertainty as a probabilistic distribution of virtual objects is mapped by the orbital model into the
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Analysis of the Topography and Gravity Data for the Earth-like Venus Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 T. I. Menshchikova, T. V. Gudkova, V. N. Zharkov
Abstract We consider the issue of choosing the reference surface for the analysis of data on the topography and the gravitational field of Venus. The hypothesis of the Earth-like Venus is used. The surface of an effectively equilibrium Venus, which survives from an earlier epoch, is chosen as a reference. For a set of the Earth-like models of the internal structure of Venus, the equilibrium figure
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Lunar Crater Ina: Analysis of the Morphology of Intracrater Landforms Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 A. T. Basilevsky, G. G. Michael
Abstract We present the results of geological and morphological analysis of LROC NAC images of a small volcanic crater Ina, D-shaped in plan view (2.9 × 1.9 km), and its immediate surroundings. This crater is located at the top of a very gently sloping shield volcano, the slopes of which, judging by the density of superimposed small craters, were formed ~3.5 Ga ago. Inside the crater there is a region
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Evidence of the Cometary Nature of Asteroid Don Quixote Provided by Observations at the Sanglokh Observatory Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 G. I. Kokhirova, O. V. Ivanova, F. Dzh. Rakhmatullaeva
Abstract We report the results of multicolor optical observations of asteroid (3552) Don Quixote carried out at the Zeiss-1000 telescope of the Sanglokh International Astronomical Observatory of the Institute of Astrophysics of the Academy of Sciences of the Republic of Tajikistan in July 2018. The apparent and absolute magnitudes of the asteroid were determined in the VRI bands. The analysis of the
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Features of the Relief Spectrum of the Moon and Planets Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 G. S. Golitsyn
Abstract The relief spectra of the Moon, Mars and Earth with a very high resolution are discussed (Rexer and Hirt, 2015). According to the Kaula rule (Kaula, 1966), these spectra decay as \({{k}^{{ - 2}}}\). This fact has been recently explained (Gledzer and Golitsyn, 2019) based on the probabilistic laws by Kolmogorov and his school (Kolmogorov, 1934; Obukhov, 1959; Monin and Yaglom, 1967; Golitsyn
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Rotational Dynamics of the Inner Satellites of Jupiter Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 V. V. Pashkevich, A. N. Vershkov, A. V. Mel’nikov
Abstract— The article considers the attitude stability of synchronous rotation and the most significant relativistic effects in the rotational dynamics of the inner satellites of Jupiter: Metis (J16), Adrastea (J15), Amalthea (J5), and Thebe (J14). It is established that the plane synchronous rotation of all inner satellites of Jupiter for the most probable values of the parameters of their shapes
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Activity of Small-Scale Internal Waves in the Northern Polar Atmosphere of Venus by Radio Occultation Measurements of Signal Intensity (Λ = 32 cm) from Venera-15 and -16 Satellites Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 V. N. Gubenko, I. A. Kirillovich, D. V. Gubenko, V. E. Andreev, T. V. Gubenko
Abstract The radio occultation measurements of the signal intensity (λ = 32 cm) of the Venera-15 and -16 satellites, carried out from October 16 to October 31, 1983, are used to analyze the activity of internal waves in the northern polar atmosphere of Venus. Observations of the intensity of radio waves provide important information about the fine-scale structure of the planet’s atmosphere. Comparison
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Zonal Features in the Behavior of Weak Molecular Absorption Bands on Jupiter Solar Syst. Res. (IF 0.756) Pub Date : 2021-02-19 V. D. Vdovichenko, A. M. Karimov, G. A. Kirienko, P. G. Lysenko, V. G. Tejfel’, V. A. Filippov, G. A. Kharitonova, A. P. Khozhenets
Abstract Based on the spectral observations of Jupiter carried out over recent years, we consider the behavior of weak molecular absorption bands of methane and ammonia in a wavelength range of 600−800 nm. In the latitudinal behavior of the intensity of these bands, rather clearly expressed features, demonstrating a connection with the zonal structure of cloud belts of the planet, are traced. However
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On the Development of Transformable Structures of Space Telescopes Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 A. A. Moisheev, S. V. Shostak
Abstract The article presents an overview of some design features of the development of transformable structures of space telescopes as well as descriptions of real projects in which these features have been implemented.
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Mathematical Model of the Motion of Gaseous Thermal Decomposition Products of Composites in a Porous Frame under Strong Heat Flows Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 A. E. Zaponov, M. V. Sakharov, V. A. Glazunov, R. A. Trishin
Abstract The paper describes theoretical issues of the motion of gaseous thermal decomposition products of composite materials in a porous frame structure under the effect of intensive heat flows of different nature. The developed model was verified using benchmark filtration problems and its performance was tested for gas motion using the sample with the porosity that varied in coordinates.
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Development of Technology for Soldering Small-Diameter Pipelines from Aluminum Alloys and Dissimilar Materials Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 K. E. Ponomarev, A. M. Stroganov, I. V. Strelnikov
Abstract The article presents the results of research carried out in the development of technology for soldering pipelines of small diameter of aluminum alloys and dissimilar materials. The advantages of the alternative design of the collector of the heat exchanger of the spacecraft with brazed joints in comparison with bimetallic adapters and ring argon arc seams are shown. A comprehensive assessment
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Meteor Hazard for Interplanetary Flights in the Ecliptic Plane Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 A. V. Bagrov, V. A. Leonov, N. A. Sorokin
Abstract To increase the safety of interplanetary missions, it is necessary to have estimates of the meteor hazard along the flight trajectory. Meteoroid particles of known meteor showers that cross the ecliptic plane at a distance of 1 AU from the Sun are observed as “shooting stars” in the Earth’s atmosphere. However, such meteor streams are principally not observable in interplanetary space. The
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A Model for Initiating Impulse Development and Transition in Small Detonation Devices Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 E. N. Kuzin, V. G. Zagarskih, V. V. Efanov, D. V. Gasheev
Abstract— A method for exciting the detonation process and its development in onboard low-pulse shatter-proof separation devices and in the units for initiating detonation equipped by high-energy elastic materials (HEEM) is examined. The relationships for calculating detonation initiation reliability for the HEEM charge are presented and practical recommendations for increasing it are given.
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Implementation of the Concept for Creating a Spacecraft Double-Launch System as a Part of the Upper Stages of the Fregat Family Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 S. V. Ishin, V. P. Vikulenkov, D. I. Fedoskin, A. Yu. Poreshnev, N. B. Jumahanov, B. D. Yakovlev
Abstract—Results of the implementation of a single concept for the development of the double launch system (SDZ) are presented, in particular the SDZ-La5 for the Fregat-SBU upper stage. Design and functional solutions are defined for the SDZ-La5 application as a part of RBF2U-SBU which differs in its geometry and mass-inertia properties from the Fregat upper stage (RBF). Information is presented on
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Determination of the Thermophysical Characteristics of the Lunar Soil Using Solar Heat Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 K. K. Dudkin, O. M. Alifanov
Abstract The possibility of determining the thermophysical characteristics of the lunar soil by a penetrating probe when using solar heat as a heater is considered. The effectiveness of this measurement method is evaluated.
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Atmospheric Modeling for Controlling the Motion of a Return Vehicle Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 A. S. Vyazankin, N. D. Tsvetkova, P. N. Vargin, V. A. Yushkov
Abstract The article presents the prognostic capabilities of the SOCOL global climate model. A correction of the trajectory is proposed by supplementing the algorithms of the nominal control of the return vehicle with the atmospheric parameters at altitudes of 40–80 km obtained as a result of prognostic calculations.
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Reduction of Hydraulic Losses in a Pebble-Bed Reactor for Nuclear Power Propulsion Systems for Advanced Spacecraft Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 F. V. Pelevin, A. V. Ponomarev, O. E. Shatskii, I. V. Lokhanov
Abstract An analysis of various schemes for coolant motion in a nuclear reactor with spherical microfuel elements (coated fuel particles, or pebbles) is presented. The conditions under which it is possible to reduce the pressure losses in the coolant keeping all the advantages of the spherical microfuel elements versus the fuel rods are considered. The rate of coolant flow and the pressure losses in
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“Bumerang” Must Return to Earth Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 I. V. Lomakin, V. G. Pol, A. V. Simonov, A. E. Shirshakov, S. V. Shostak
Abstract The “Bumerang” space mission to the satellites of Mars is discussed. The purpose of the mission is to study the satellites and return of soil samples from Phobos to the Earth. The previous such missions to Mars are revisited. To increase the chances of success of the “Bumerang” mission, it is proposed to carry out a preemptive demo flight to a small asteroid, ahead of the mission. The goal
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Analysis of Key Technologies for a Space Geophysics Mission: Required Accuracies and Engineering Solutions Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 V. K. Milyukov, A. V. Burdanov, A. S. Zhamkov, V. E. Zharov, O. A. Ivlev, I. M. Nesterin, V. K. Sysoev
Abstract—The paper analyzes the Russian scientific and technological capabilities to manufacture a space-borne observation platform for high-precision monitoring of the Earth’s gravitational field. It is shown that some Russian space systems manufacturing technologies may well be used for this purpose; however, in general, the level of the domestic technologies must be substantially improved so as
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A New Way of Automated Dust Control of the External Atmosphere of a Spacecraft During Thermal-Vacuum Testing Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 N. N. Ivanov, D. B. Dobritsa, B. Yu. Yaschenko
Abstract During ground-based thermal vacuum tests of spacecraft, it is necessary to control and monitor the change in dust content in closed and semiclosed hollows of the spacecraft, near the optical surfaces of scientific and service hardware, mirrors, solar arrays, multilayer insulation, as well as in the volume of the thermal-vacuum chamber itself during its evacuation etc. It is known that the
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On the Use of Inflatable Decelerators in the Design of Spacecraft Intended for the Study of Venus Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 V. S. Finchenko, A. A. Ivankov, M. M. Golomazov, S. I. Shmatov
Abstract The article presents aspects of the use of inflatable decelerators in the design of spacecraft (SC) intended for the study of the atmosphere of Venus. The results of the aerothermodynamics calculations and justification of the thermal protection of SC with decelerators are given. Their advantages over conventional descent modules during aerodynamic deceleration in the planet’s atmosphere are
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Conceptual Design of the Chinese-Russian On-Orbit-Assembling Space Telescope (OAST) Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 Xu Boqian, Yu Funan, A. S. Shugarov, M. E. Sachkov, I. S. Savanov, Gao Yan, Wang Shuaihui, Ju Guohao, Zhang Chunyue, Kuang Ye
Abstract— Astronomical space telescopes with large apertures of various spectral ranges have become one of the main tools of exploring the Universe. Conventional technologies do not allow increasing the space telescope aperture above several meters. This article describes the conceptual design of an UV and IR On-orbit Assembling Space Telescope (OAST) with an aperture of 10 m. Unlike conventional space
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On the Calculation of the Geometric Resolution and Energy Potential of a Bistatic Synthetic Aperture Radar in Geosynchronous Orbit Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 A. S. Petrov, A. A. Prilutskiy, V. A. Chikov, A. S. Volchenkov
Abstract A model and a software module were developed to analyze the shape of the trajectory described by the subsatellite point on the Earth’s surface depending on eccentricity, perigee angle, and inclination of the geosynchronous orbit (GEO). For various parameters of the satellite’s orbit and synthetic aperture radar (SAR) equipment, we built the dependences of the geometric resolution in the longitudinal
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System Problems in the Development of Ultralight-Class Launch Vehicles Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 Yu. A. Matveev, A. A. Pozin, V. M. Shershakov
Abstract— We examine system problems in developing launch vehicles in the ultralight class as a modification of the basic meteorological rocket. Reasonable parameters for the ultralight launch vehicle of such type are determined. It is shown that this project can be implemented efficiently.
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Linearization Method for Optimizing Noncoplanar Flights with Low Thrust Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 L. V. Vernigora, P. V. Kazmerchuk
Abstract Problems on optimizing the noncoplanar flights with low thrust from elliptical to geosynchronous orbits for different control accelerations are solved. Recommendations for choosing an initial approximation are given. The results are compared with the results obtained by other authors.
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Features of Lunar Rover Design Considering Radiation Effects from Outer Space and Onboard Radioisotope Heat Sources Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 E. V. Vlasenkov, I. V. Zefirov, N. M. Khamidullina, T. S. Kombaev
Abstract The dose effect on the onboard equipment of the lunar rover from ionizing radiation from outer space and from radioisotope sources intended for providing the thermal regime of the spacecraft in a lunar night are considered. Calculations are made to determine the requirements for radiation hardness of devices and their components, as well as the possibility of using the instrumentation reserve
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On the Dynamics of Atmospheric Gas Filling the Interior of a Prospective Descent Module During Descent in the Atmosphere of Mars Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 M. M. Golomazov, A. A. Ivankov
Abstract The article presents the calculation technique and the results of a study of the penetration of hot gas from the shock layer into the internal space of the prospective descent module due to leakage of the structure of the vehicle during descent in the Martian atmosphere.
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Equivalent Flux Function Smoothing in the Problem of Solar Cells Radiation Degradation Minimization During a Low-Thrust Geostationary Orbit Insertion Solar Syst. Res. (IF 0.756) Pub Date : 2020-12-22 A. E. Starchenko
Abstract The paper describes a modified smooth approximation method for smoothing the dependence of the equivalent fluence of charged particles of the Earth’s Van Allen radiation belts on time and position in near-Earth space. It is shown that this method can be effectively used to solve the problems of minimizing radiation-induced degradation of spacecraft solar cell arrays. The latter problems involve
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Orientation of Figures of Small Planetary Satellites During Chaotic Rotation Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 A.V. Mel’nikov
Abstract The effect of the preferred orientation of the largest axis of the satellite’s figure toward the planet during chaotic rotation is considered by means of numerical experiments. It has been found that the effect is most noticeable in the chaotic dynamics of small satellites with an orbital eccentricity e ≤ 0.005; this may impede the identification of the chaotic rotation of the satellite if
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Thermodynamics of the Bose Gas and Blackbody Radiation in Non-Extensive Tsallis Statistics Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 A. V. Kolesnichenko
Abstract— The aim of this paper is to construct the thermodynamics of open quantum systems of elementary Bose-gas particles in the framework of nonextensive Tsallis statistics based on modified quantum entropy, which depends on the real deformation parameter \(q.\) We obtain generalized expressions for the thermodynamic potential, internal energy, free energy, specific heat, and pressure, as well as
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The Destruction of Small Lunar Craters Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 A. T. Basilevsky, G. G. Michael, S. S. Krasilnikov, N. A. Kozlova
Abstract The paper discusses three types of processes of destruction of small lunar craters: (1) destruction by overlapping craters; (2) destruction due to filling with ejecta from neighboring and remote craters; and (3) destruction due to the displacement of surface material by various slope processes. These processes act together, but the role of each in a specific situation and at different stages
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Radio Emission of Meteor Bodies in the Extremely Low Frequency Range Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 A. D. Filonenko
Abstract— A model for generating electromagnetic fields in the ELF/VLF range accompanying the final stage of the evolution of meteorites in the Earth’s atmosphere is presented. The phenomenon of low-frequency radio emission is an experimentally proven fact; however, the currently known generation models are not supported by numerical calculations that would not contradict the experimental facts. The
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Matching of Models of the Internal Structure and Thermal Regime of Partially Differentiated Titan with Gravity Field Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 V. A. Kronrod, A. N. Dunaeva, T. V. Gudkova, O. L. Kuskov
Abstract The problem of matching models of the internal structure of partially differentiated Titan with experimentally measured values of Love number k2 (Iess et al., 2012; Durante et al., 2019) according to results of studying the gravity field of Titan based on flights of the Cassini spacecraft is discussed. The values of k2 obtained presumably point to the presence of large masses of liquid (ocean)
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Simulation of the Magnetic Anomaly Associated with a Complex Crater Using the Example of the Bosumtwi Crater Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 M. Yu. Kuzmicheva, B. A. Ivanov
Abstract The impact crater formation on the surface of the Earth and other planetary bodies is accompanied by the action of shock waves on rocks and their displacement into a new position. The shock-wave compression results in the occurrence of the remanent heating of rocks (up to melting and evaporation during the unloading). The direct mechanical action of the shock compression and the remanent heating
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Number of Near-Earth Objects and Formation of Lunar Craters over the Last Billion Years Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 S. I. Ipatov, E. A. Feoktistova, V. V. Svettsov
Abstract We compare the number of lunar craters larger than 15 km across and younger than 1.1 Ga to the estimates of the number of craters that could have been formed for 1.1 Ga if the number of near-Earth objects and their orbital elements during that time were close to the corresponding current values. The comparison was performed for craters over the entire lunar surface and in the region of the
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Multicolor Photometry of Small Bodies of the Solar System: Performance Potential at the Robophot Telescope Solar Syst. Res. (IF 0.756) Pub Date : 2020-10-01 A. E. Potoskuev, V. V. Busarev, V. V. Krushinskii, E. D. Kuznetsov, A. A. Popov, A. M. Sobolev
Abstract We consider prospects for investigating asteroids with the multicolor photometric method at the Robophot telescope—a robotic telescope of the Dall–Kirkham system with a 0.6-m primary mirror and a focal length of 4.2 m. It is equipped with a three-channel photometer with the g', r', and i' filters of the SDSS photometric system, and the field of view is 20′. The use of a three-channel photometer
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On the Evolution of Orbits in the Outer Version of the Restricted Elliptic Doubly Averaged Three-Body Problem Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 M. A. Vashkov’yak
AbstractThe outer version of the restricted elliptic three-body problem, where a perturbed body of negligible mass is far from two bodies of finite masses (the main and perturbing ones) close to one another and its orbit is located entirely outside the orbit of the perturbing body, is considered. The terms up to the fourth order inclusive in the ratio of the orbital semimajor axes of the perturbing
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A Study of Largest Active Region AR12192 of 24th Solar Cycle Using Fractal Dimensions and Mathematical Morphology Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 Asma Zaffar; Shaheen Abbas; Muhammad Rashid Kamal Ansari
AbstractAn active region (AR) of the sun is an area of strong magnetic field. Sunspots are frequently formed in an AR. Solar activity exhibits in the form of solar flares and coronal mass ejections. Solar active region AR12 192 occurring on October 18, 2014 hosted the largest sunspot of the 24th solar cycle which was of the size of Jupiter. AR12 192 was ranked 33rd largest active region out of 32908
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Digitization of Astronegatives of the Pulkovo Glass Library: Positions of Saturn’s Major Satellites in the Period 1972–1982 in the Gaia DR2 System Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 M. Yu. Khovrichev; N. V. Narizhnaya; T. A. Vasil’eva; I. S. Izmailov; A. M. Kulikova; D. A. Bikulova
AbstractWe present the results of the re-reduction of Pulkovo photographic plates with images of Saturn’s major satellites in the Gaia DR2 catalog system (169 plates, 3007 individual positions). Astronegatives were taken with the 26-inch refractor at the Pulkovo Observatory between 1972 and 1982. The intrinsic accuracy of measurement of astronegatives using the Pulkovo MDD system was 1 μm (20 mas on
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Adaptive Methods of the Flybys Constructing in the Jovian System with the Orbiter Insertion Around the Galilean Moon Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 Yu. F. Golubev; A. V. Grushevskii; V. V. Koryanov; S. M. Lavrenov; A. G. Tuchin; D. A. Tuchin
Abstract—We consider space expeditions with a long-term spacecraft stay near the studied celestial body (artificial satellites of small bodies of the Solar System), or expeditions with a possible spacecraft landing on the surface of the celestial body (for example, the ESA Jovian Icy Moon Explorer JUICE mission, and the Russian prospective project Laplace‑P). An effective formalism is proposed for
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Micrometeoroids: the Flux on the Moon and a Source of Volatiles Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 D. D. Badyukov
AbstractOne of the probable sources of water and other volatiles, forming ice deposits in the shadowed polar regions of the Moon, is cosmic matter delivered by comets and asteroids, as well as by cosmic dust. In this connection, we estimated the contribution of volatile components to the material received due to micrometeoroid bombardment. From the estimates of the current flux of micrometeoroids to
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Accuracy of Analysis of the Elemental and Isotopic Composition of Regolith by Laser Time-of-Flight Mass Spectrometry in the Future Luna-Glob and Luna-Resurs-1 Missions Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 A. E. Chumikov; V. S. Cheptsov; N. G. Managadze
AbstractLaser ionization mass spectrometry is one of the most promising methods for analysis of the elemental and isotopic composition of solids in space experiments: the required instruments are highly reliable and easy to operate, no sample preparation is needed, and the spatial resolution of this method is relatively high. In view of this, the LASMA-LR laser ionization mass spectrometer was included
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Gamma and Neutron Spectrometers Designed for Installation Onboard the Lunar Rover Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 M. L. Litvak; D. V. Golovin; M. V. Djachkova; D. V. Kalashnikov; A. S. Kozyrev; I. G. Mitrofanov; M. I. Mokrousov; A. B. Sanin; V. I. Tret’yakov
AbstractThe paper presents the scientific tasks, description, and comparison of various gamma and neutron spectrometers that can be installed on board a medium-class lunar rover with a mass up to 100 kg. As a specific example, we consider the scientific equipment proposed for the future Russian mission Luna-Grunt, the main purpose of which is the delivery of lunar polar regolith samples to the Earth
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Dynamic Structure of Near-Earth Orbital Space in the 1 : 2 Resonance Region with the Speed of Earth’s Rotation Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 I. V. Tomilova; D. S. Krasavin; T. V. Bordovitsyna
Abstract—The paper presents the results of a study of the dynamic structure of near-Earth orbital space in the 1 : 2 resonance region with Earth’s rotation speed. The results of an extensive numerical-analytical experiment to study the orbital evolution of objects moving in the semimajor axis range from 26 550 to 26 570 km, with inclinations from 0° to 180°. In this region, the zones of action of the
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Determination of Global Density Inhomogeneities and Stresses Inside the Moon Solar Syst. Res. (IF 0.756) Pub Date : 2020-08-03 N. A. Chuikova; L. P. Nasonova; T. G. Maximova
Abstract—The possible distribution of density and stress anomalies in the interior of the Moon is determined. For this purpose, we have developed a new solution of the incorrect inverse gravimetry problem developed by the authors, tested for the Earth and Mars. The idea of this solution is that the isostatic compensation depths are uniquely determined for the harmonics of the expansion of the relief
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Deep-Hole Soil-Sampling Tools for Future Russian Lunar Polar Missions Solar Syst. Res. (IF 0.756) Pub Date : 2020-06-01 M. L. Litvak; A. V. Nosov; T. O. Kozlova; V. I. Mikhal’skii; A. S. Perkhov; V. I. Tret’yakov
AbstractThe review of both previously used lunar deep-hole soil-sampling tools (DSSTs) and new prototypes of these devices, developed for exploring the lunar polar regolith in future lunar projects, is presented, and the DSST options with different technical parameters and layout arrangements intended for future Russian lunar missions are also considered.
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Meteoritic Nanodiamonds: Alternative Composition of Xenon Components Solar Syst. Res. (IF 0.756) Pub Date : 2020-06-01 A. V. Fisenko; L. F. Semjonova
AbstractFor the first time, abundances of the main xenon components (Xe-P3, Xe-P3(fr), Xe-P6 and Xe-pr instead Xe-HL) in the nanodiamonds of Orgueil (CI), Tieschitz (H3.6) and Indarch (EH3-4) meteorites have been calculated. The Xe-pr component is the excess fraction of xenon isotopes in the Xe-HL component relative to Xe-P3 (fr) and mainly consists of the 124, 126, 134, 136Хе isotopes formed in p-
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The Dependence of the Mass Distribution of Exoplanets on the Spectral Class of Host Stars Solar Syst. Res. (IF 0.756) Pub Date : 2020-06-01 V. I. Ananyeva; A. E. Ivanova; A. A. Venkstern; A. V. Tavrov; O. I. Korablev; J.-L. Bertaux
AbstractWe analyze the mass distributions of exoplanets of three groups: transit planets discovered by the Kepler telescope, those found in ground-based observational programs and with the CoRoT satellite, and planets discovered in the vicinity of red dwarfs (M class) with the radial-velocity method. The dependence of the mass distributions of the Kepler transit planets on the spectral class of the
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The Rate of Falls of Meteorites and Bolides Solar Syst. Res. (IF 0.756) Pub Date : 2020-06-01 A. E. Dudorov; O. V. Eretnova
AbstractWe perform a statistical analysis of 926 confirmed falls of meteorites that occurred in the period 1860 to 2017. The distribution of meteorites over masses is approximated with a lognormal law. It has been shown that the mean interval between the detections of falls of Chelyabinsk-like meteorites is ~25 years. The time dependence of the annual number of meteorite falls is analyzed with the
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Parametric Method of Moments for Solving the Smoluchowski Coagulation Equation in the Theory of Accumulation of Dust Bodies in a Protoplanetary Disk Solar Syst. Res. (IF 0.756) Pub Date : 2020-06-01 A. V. Kolesnichenko
AbstractIn relation to the problem of accumulation of dust particles, which are the main structure-forming element of planetesimals in a protoplanetary cloud, we propose a parametric method of moments for solving the Smoluchowski integro-differential equation that describes dispersed coagulation of disk matter. We consider a parametric approach to finding the size distribution function of protoplanetary
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A Search for Young Asteroid Pairs with Close Orbits Solar Syst. Res. (IF 0.756) Pub Date : 2020-06-01 E. D. Kuznetsov; A. E. Rosaev; E. Plavalova; V. S. Safronova; M. A. Vasileva
Abstract—We 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 and velocities at the moments of asteroid
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Chemical and Isotope Composition of Comet 67P/Churyumov−Gerasimenko: The Rosetta−Philae Mission Results Reviewed in the Context of Cosmogony and Cosmochemistry Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 V. A. Dorofeeva
AbstractThe studies of the composition and structure of comet 67P/Churyumov–Gerasimenko—a short-period comet of Jupiter’s family—which was an object of the recent Rosetta–Philae space mission, yielded results unique in many respects, since it was the first time that a comet was investigated in situ for a long stretch of time under varying conditions of insolation and activity. Due to the landing of
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Study of the Composition of ABA Panu (L3) Meteorite Degassing Products Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 A. V. Stennikov; V. S. Fedulov; S. G. Naimushin; N. V. Dushenko; S. A. Voropaev
AbstractThe study of the degassing of primitive cosmic matter (in particular meteorites) allows us to better understand and evaluate the processes that occur during the formation of the primary (lost) and secondary atmospheres of rocky planets. To do this, the author’s technique using a specially designed device was employed. Continuing the ideas of the previous work, where the composition of the volatile
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Callisto in the Magnetosphere of Jupiter Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 E. S. Belenkaya
Abstract—The study of the Galilean satellites can help clarify the structure of the magnetospheric magnetic field from observations of their projections along magnetic field lines in the atmosphere/ionosphere of Jupiter, where patches of auroras appear. UV auroras in projections on the ionosphere of Io, Europe and Ganymede occur almost permanently, while the observation of the track of Callisto is
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Prolate Body Disruption by Earth at Near Flyby: Possible Scenarios Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 S. A. Voropaev; Yan Jianguo; Jean-Pierre Barriot
AbstractIn this paper, we discuss the possible disruption of a prolate ellipsoidal small body by the Earth’s tidal forces during a close flyby. An exact expression for the stress tensor under the action of gravity, rotation, and tidal forces is obtained using the analytical solution of the elastic problem. Constraints for the critical distance are derived taking into account the size, shape, density
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Jeans Instability of a Protoplanetary Gas Cloud with Radiation in Nonextensive Tsallis Kinetics Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 A. V. Kolesnichenko
Abstract—In the framework of Tsallis statistics, we study the effect of medium nonextensivity on the Jeans gravitational instability criterion for a self-gravitating protoplanetary cloud, the substance of which consists of a mixture of perfect gas and blackbody radiation. Generalized Jeans instability criteria have been found from the corresponding dispersion relations obtained both for a uniform cloud
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Some Features of Comet Hale–Bopp (According to the Observations of 1995–1998) Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 L. V. Ksanfomaliti
Abstract“The Great Comet of 1997” was a significant event in cometary physics. Numerous interesting scientific studies are devoted to this comet. Unfortunately, in the Russian scientific literature, there are few publications on investigations of Comet Hale–Bopp. This study is timed to the twentieth anniversary of finishing the main observations of this comet and reminds the readers about some of its
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Terrain Effect on Impact Cratering Solar Syst. Res. (IF 0.756) Pub Date : 2020-04-03 V. V. Shuvalov
Abstract—The results of numerical simulation of kilometer-sized asteroid impacts on different types of terrain (a flat surface, a mountain, and a depression) are presented. The results show that terrain features significantly affect the amplitude of the shock wave propagating along the surface, the fireball size, the radiation fluxes on the surface, and the distribution of ejecta around the crater
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Density Anomalies in Subsurface Layers of Mars: Model Estimates for the Site of the InSight Mission Seismometer Solar Syst. Res. (IF 0.756) Pub Date : 2020-03-31 T. V. Gudkova; I. E. Stepanova; A. V. Batov
AbstractA model distribution of anomalous masses in the southwestern part of Elysium Planitia under the surface of the site of the InSight mission seismometer has been obtained. Numerical simulations are performed with the S-approximation method by expansions of the data on the Martian topography and gravitational field (the MRO120D model) in spherical harmonics to the 90th degree and order. Inhomogeneity
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Geomorphological Analysis of ExoMars Candidate Landing Site Oxia Planum Solar Syst. Res. (IF 0.756) Pub Date : 2020-03-31 M. A. Ivanov; E. N. Slyuta; E. A. Grishakina; A. A. Dmitrovskii
AbstractThe article is devoted to a detailed photogeological and topographic analysis of the surface in the region of Oxia Planum, which is the most likely landing site for the rover of the ExoMars mission. The landing site consists of two topographic domains (highlands and lowlands) separated by a sharp regional slope. The highland domain accounts for approximately 25% of the landing site. The main
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