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The Geochemical Legacy of Low-Temperature, Percolation-Driven Core Formation in Planetesimals Earth Moon Planets (IF 0.9) Pub Date : 2023-07-31 Geoffrey David Bromiley
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The Invariance of the Tisserand Parameter in Various Gravitational Theories Earth Moon Planets (IF 0.9) Pub Date : 2023-07-28 Ioannis Haranas, Youssef M. Shehata, Kristin Cobbett, Ioannis Gkigkitzis, Dimitrios Theodore Kalafatis, Ryan Gauthier
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Ion Implantation and Chemical Cycles in the Icy Galilean Satellites Earth Moon Planets (IF 0.9) Pub Date : 2023-06-13 G. Strazzulla, M. E. Palumbo, P. Boduch, H. Rothard
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The Monthly Rates of TV Sporadic Meteors Between 2014 and 2021 Earth Moon Planets (IF 0.9) Pub Date : 2023-04-12 Alberto S. Betzler
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The EURONEAR Lightcurve Survey of Near Earth Asteroids 2017–2020 Earth Moon Planets (IF 0.9) Pub Date : 2022-07-25 O. Vaduvescu, A. Aznar Macias, T. G. Wilson, T. Zegmott, F. M. Pérez Toledo, M. Predatu, R. Gherase, V. Pinter, F. Pozo Nunez, K. Ulaczyk, I. Soszyński, P. Mróz, M. Wrona, P. Iwanek, M. Szymanski, A. Udalski, F. Char, H. Salas Olave, G. Aravena-Rojas, A. C. Vergara, C. Saez, E. Unda-Sanzana, B. Alcalde, A. de Burgos, D. Nespral, R. Galera-Rosillo, N. J. Amos, J. Hibbert, A. López-Comazzi, J. Oey, M
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Statistical Thermodynamics of Surface-Bounded Exospheres Earth Moon Planets (IF 0.9) Pub Date : 2022-05-12 Norbert Schörghofer
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Identifying Shocked Feldspar on Mars Using Perseverance Spectroscopic Instruments: Implications for Geochronology Studies on Returned Samples Earth Moon Planets (IF 0.9) Pub Date : 2022-05-03 S. Shkolyar, S. J. Jaret, B. A. Cohen, J. R. Johnson, O. Beyssac, J. M. Madariaga, R. C. Wiens, A. Ollila, S. Holm-Alwmark, Y. Liu
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The Distribution of Craters Within Craters Earth Moon Planets (IF 0.9) Pub Date : 2022-03-23 Anthony R. Dobrovolskis
The interior of a crater should have a lower mean areal density of smaller impact craters than nearby plains have, because the impacts are spread out over a larger surface area, and because the crater’s wall partially shields its interior. Inside a crater shaped like a spherical bowl (a spherical cap turned upside-down), smaller primary impact craters should be spread uniformly, but secondary craters
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Photometric Correction of Images of Visible and Near-Infrared Bands from Chandrayaan-1 Hyper-Spectral Imager (HySI) Earth Moon Planets (IF 0.9) Pub Date : 2021-12-06 Subhadyouti Bose, Mili Ghosh Nee Lala, Akhouri Pramod Krishna
Photometric correction is a necessary step in planetary image pre-processing since the images of planetary surfaces are acquired by orbiting spacecraft at various observational geometries. In this study, visible (748 nm) and near-infrared (948 nm) bands of Hyper Spectral Imager (HySI) onboard Chandrayaan-1 have been used to derive a preliminary photometric correction for lunar data. The purpose of
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Instability of Triangular Equilibrium Points in the Restricted Three-Body Problem Under Effects of Circumbinary Disc, Radiation Pressure and P–R Drag Earth Moon Planets (IF 0.9) Pub Date : 2021-10-21 Tajudeen Oluwafemi Amuda, Jagadish Singh
The paper examines instability of triangular equilibrium points of a test particle in the gravitational field of two primaries radiating with effective Poynting–Robertson (P–R) drag, enclosed by circumbinary disc. The equations of motion are derived and positions of triangular equilibrium points are located. It is seen that the locations are affected by the disc, radiation pressure and P–R drag of
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Migration of Water Molecules in the Permanently Shaded Areas of Polar Areas of Mercury Earth Moon Planets (IF 0.9) Pub Date : 2021-08-28 E. A. Feoktistova, A. Y. Zharkova, A. A. Kokhanov, Zh F. Rodionova
Radar observations of the surface of Mercury had revealed areas with bright reflective properties in both polar regions of the planet. It was suggested that such areas contain depositions of volatile compounds, including water. In this paper, we investigated migration of water molecules to the permanently shaded areas, located in the impact crater in the polar regions of Mercury. To simulate the migration
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Test of the Hypothesis for an Unknown Distant Massive Planet in the Solar System Applying Tisserand’s Criterion to a System of Long-Period Comets Earth Moon Planets (IF 0.9) Pub Date : 2021-07-25 Ayyub Guliyev, Shaig Nabiyev, Rustam Guliyev
This article presents the results of an analysis of Tisserand’s constant for 1389 long-period comets in relation to a hypothetical planet. A mechanism is proposed to apply Tisserand’s criterion for a relatively trans-Neptunian planet with a notable inclination and orbit eccentricity. In particular, the algorithm considers the planet’s heliocentric distance in the era of a clearly-defined transformational
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The EURONEAR Lightcurve Survey of Near Earth Asteroids—Teide Observatory, Tenerife, 2015 Earth Moon Planets (IF 0.9) Pub Date : 2021-04-26 O. Vaduvescu, R. Cornea, A. Aznar Macias, A. Sonka, M. Predatu, M. Serra-Ricart
One meter class telescopes could bring important contributions in the acquisition of lightcurves of near earth asteroids (NEAs), based on which rotations and other physical properties could be derived or constrained. Part of a collaboration between IAC, ESA and the EURONEAR during the semester 2015A, the IAC80 and OGS telescopes at Teide Observatory in Tenerife were allocated for a photometric project
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The Mechanical Properties of Chelyabinsk LL5 Chondrite Under Compression and Tension Earth Moon Planets (IF 0.9) Pub Date : 2021-02-27 Dmitry Zaytsev, Elijah N. Borodin, A. E. Dudorov, P. Panfilov
The mechanical properties of Chelyabinsk LL5 chondrite (Chelyabinsk meteorite) were studied by uniaxial compression and diametral compression/indirect tension test. Twenty cylindrical samples, 10 for compression and 10 for tension, with the diameter 3.3 mm and 1.65 mm in height have been prepared for testing. It was shown that the strength of the tested samples under compression almost 45 times greater
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Depths of Copernican Craters on Lunar Maria and Highlands Earth Moon Planets (IF 0.9) Pub Date : 2021-01-29 E. A. Feoktistova, S. I. Ipatov
We present a study on the relationship between the ratio of the depth of a crater to its diameter and the diameter for lunar craters both on the maria and on the highlands. We consider craters younger than 1.1 billion years in age, i.e. of Copernican period. The aim of this work is to improve our understanding of such relationships based on our new estimates of the craters’s depth and diameter. Previous
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Revisiting Lunar Seismic Experiment Data Using the Multichannel Simulation with One Receiver (MSOR) Approach and Random Field Modeling Earth Moon Planets (IF 0.9) Pub Date : 2020-10-14 Siavash Mahvelati, Joseph T. Coe
Major advancements in surface wave testing over the past 2 decades have led researchers to revisit and re-analyze archived seismic records, particularly those involving measurements on the Moon. The goal of such recent efforts with lunar seismic measurements has been to gain further insights into lunar geology. We examined the active seismic data from the Apollo 16 mission for their surface wave information
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Automated Extraction of Crater Rims on 3D Meshes Combining Artificial Neural Network and Discrete Curvature Labeling Earth Moon Planets (IF 0.9) Pub Date : 2020-10-08 Nicole Christoff, Laurent Jorda, Sophie Viseur, Sylvain Bouley, Agata Manolova, Jean-Luc Mari
One of the challenges of planetary science is the age determination of geological units on the surface of the different planetary bodies in the solar system. This serves to establish a chronology of the geological events occurring on these different bodies, hence to understand their formation and evolution processes. An approach for dating planetary surfaces relies on the analysis of the impact crater
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Study of Coronal Mass Ejections Succeeding the Associated X-Ray and γ-Ray Burst Solar Flares Earth Moon Planets (IF 0.9) Pub Date : 2020-07-01 Walid Abdel-Sattar, Ramy Mawad
This study is dedicated to the investigation of the characteristics of CMEs following the associated X-ray and γ-ray burst solar flares. Investigated 14786 CME events and 5092 Gamma Burst Monitor (GBM) solar flare events recorded during the solar period 2008–2017, found 503 (about 10%) CME events associated with GBM post-flare events (hereafter, GBM post-flare—CME). All of these 503 events (100%) are
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Exposure Ages, Noble Gases and Nitrogen in the Ordinary Chondrite Karimati (L5) Earth Moon Planets (IF 0.9) Pub Date : 2020-07-01 Ramakant R. Mahajan
Noble gas and nitrogen isotopic compositions of Karimati ordinary (L5) chondrite are presented. Aliquots of the meteorite were studied in two noble gas mass spectrometers. Its cosmic ray exposure (CRE) history, trapped noble gases and nitrogen isotopic systematic are examined. The compositions of Ne and Kr in this meteorite indicate presence of mixture of solar wind and Q trapped components. In addition
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Statistical Characteristics on SEPs, Radio-Loud CMEs, Low Frequency Type II and Type III Radio Bursts Associated with Impulsive and Gradual Flares Earth Moon Planets (IF 0.9) Pub Date : 2020-07-01 P. Pappa Kalaivani, A. Shanmugaraju, O. Prakash, R.-S. Kim
We have statistically analyzed a set of 115 low frequency (Deca-Hectometer wavelengths range) type II and type III bursts associated with major Solar Energetic Particle (SEP: E p > 10 MeV) events and their solar causes such as solar flares and coronal mass ejections (CMEs) observed from 1997 to 2014. We classified them into two sets of events based on the duration of the associated solar flares:75
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The Subjectivity in Identification of Martian Channel Networks and Its Implication for Citizen Science Projects Earth Moon Planets (IF 0.9) Pub Date : 2020-02-19 R. S. Bahia, M. Jones
The Martian surface is incised by numerous valley networks, which indicate the planet experienced sustained widespread flowing water in the past (e.g. Carr in Water on Mars, Oxford University Press, New York, 1996; Phil Trans R Soc A 370:2193–2212, 2012. https://doi.org/10.1098/rsta.2011.0500 ). Examining the distribution and geometries of these valley networks provides invaluable information about
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Solar Eclipses and the Surface Properties of Water Earth Moon Planets (IF 0.9) Pub Date : 2019-09-30 Elmar C. Fuchs, Gerrit Oudakker, Martin Justinek, Nigel Dyer, Jakob Woisetschläger, Kevin Godines, Matthias Mäder, Friedemann T. Freund
During four solar eclipse events (two annular, one total and one partial) a correlation was observed between a change in water surface tension and the magnitude of the optical coverage. During one eclipse, evaporation experiments were carried out which showed a reduction in water evaporation at the same time as a rise in the surface tension. The changes did not occur on a day without a solar eclipse
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Dark Matter Objects: Possible New Source of Gravitational Waves Earth Moon Planets (IF 0.9) Pub Date : 2019-09-14 C. Sivaram, Kenath Arun
Gravitational waves from mergers of black holes and neutron stars are now being detected by LIGO. Here we look at a new source of gravitational waves, i.e., a class of dark matter objects whose properties were earlier elaborated. We show that the frequency of gravitational waves and strains on the detectors from such objects (including their mergers) could be within the sensitivity range of LIGO. The
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Superfast Exoplanets and 9600 s Earth Moon Planets (IF 0.9) Pub Date : 2019-07-15 V. A. Kotov
Motion of a substantial part of the superfast exoplanets is found to be in the close resonance with the well-known “solar” timescale $$P_{0} \approx 0.11$$P0≈0.11 days and/or the timescale 2$$P_0$$P0/$$\pi \approx 0.07$$π≈0.07 days (at 99.9% confidence for exoplanet periods $$P < 2$$P<2 days). There is also a noticeable lack of the exoplanetary “unstable” orbits with $$P \approx 3 \pi$$P≈3π$$P_0$$P0$$\
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Arecibo ALFA Array Observations in Search of Lunar Meteoroid-Strike EMPs Earth Moon Planets (IF 0.9) Pub Date : 2019-05-01 Saiveena Kesaraju, John D. Mathews, Phil Perillat
We present the preliminary results of a search for transient Electromagnetic Pulses (EMP) associated with the impact of meteoroids on the lunar surface as observed with the Arecibo Observatory ALFA (Arecibo L-band Feed Array) system. The ALFA system is a cluster of seven, dual-linear polarization feeds/beams arranged in a hexagonal manner and operated in the protected L-band region centered at 1.41 GHz
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A Catalog of Smaller Planets Earth Moon Planets (IF 0.9) Pub Date : 2019-05-01 Barton Paul Levenson
A compilation was made of N = 89 planets or moons for which the mass and radius are known, between the limits of 0.01 and 10 times the mass of Earth. Although starting from a larger and higher-quality (because it excludes m sin i figures) sample than that of Weiss and Marcy (Astrophys J Lett 783:L6–L12, 2014), the chart of log density versus radius confirms the WM14 results: Density increases up to
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Primordial Planets Predominantly of Dark Matter Earth Moon Planets (IF 0.9) Pub Date : 2019-05-01 C. Sivaram, Kenath Arun, O. V. Kiren
Cosmic structure formation is thought to occur as a bottom-up scenario, i.e. the lightest objects would have formed first. It has been suggested that the earliest structures to form could have been primordial planets. Here we propose the possibility of formation of primordial planets at high redshifts composed predominantly of dark matter (DM) particles, with planetary masses ranging from Neptune mass
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Distinction in the Interplanetary Characteristics of Accelerated and Decelerated CMEs/Shocks Earth Moon Planets (IF 0.9) Pub Date : 2018-12-05 K. Suresh, A. Shanmugaraju, Y.-J. Moon
A set of 58 Coronal Mass Ejections (CMEs) with different kinematics near the sun in LASCO Field of view (FOV) is classified into two groups (i) CMEs which are accelerating (group-I) and (ii) CMEs which are decelerating (group-II). We analyze their interplanetary propagation characteristics to study the distinction between these two groups of events. Some of the following deviations are noted between
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Photometric Study of Comet C/2014 S2 (PANSTARRS) After the Perihelion Earth Moon Planets (IF 0.9) Pub Date : 2018-11-01 A. S. Betzler, O. F. de Sousa, L. B. S. Betzler
We analyzed the BVR photometry of comet C/2014 S2 obtained between March and June 2016, in observatories installed in Europe and the United States. Using the Lomb–Scargle periodogram, we found that the most probable periodicity deduced from the V-band magnitudes is 2.70 days, suggesting that it is the period of rotation of the nucleus of this comet is $$2.70 \pm 0.07$$2.70±0.07 days or $$68 \pm 2$$68±2
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Jerk in Planetary Systems and Rotational Dynamics, Nonlocal Motion Relative to Earth and Nonlocal Fluid Dynamics in Rotating Earth Frame Earth Moon Planets (IF 0.9) Pub Date : 2018-10-03 Rami Ahmad El-Nabulsi
Some results following from the implications of nonlocal-in-time kinetic energy approach introduced recently by Suykens in the framework of rotational dynamics and motion in a non-inertial frame are discussed. Their roles in treating aspects concerning the nonlocal motion relative to Earth, the free-fall problem, the Foucault pendulum and the motion of a massive body in a rotating tube are analyzed
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Fast Spinning of Planets Earth Moon Planets (IF 0.9) Pub Date : 2018-09-29 V. A. Kotov
Spin periods of Jupiter, Saturn, Uranus and Neptune are specified by the analysis of the resonant motion of large satellites: $$P = 0.445(2)\,\hbox {d}$$P=0.445(2)d, 0.448(1) d, 0.673(9) d and 0.561(7) d, respectively. They occur to be near-commensurate with $$P_0=9600.606(12)\,\hbox {s}$$P0=9600.606(12)s, the period of the “cosmic” oscillation, discovered first in the Sun, then in other variable objects
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The Temperature Regime of the Proposed Landing Sites for the Luna-Glob Mission in the South Polar Region of the Moon Earth Moon Planets (IF 0.9) Pub Date : 2018-08-10 E. A. Feoktistova, S. G. Pugacheva, V. V. Shevchenko
In this paper, we investigated the possibility of existence of the hydrogen-containing volatile compounds, similar to those found in the Cabeus crater, in the area of the proposed landing ellipses of the Luna-Glob mission. We found that the existence of water ice and other hydrogen-containing substances is possible only in the presence of a shielding layer of regolith. The time of existence of such
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Landing Area Selection Based on Closed Environment Avoidance from a Single Image During Optical Coarse Hazard Detection Earth Moon Planets (IF 0.9) Pub Date : 2018-07-01 Ruoyan Wei, Jianwei Jiang, Xiaogang Ruan, Jianke Li
The success of a landed space exploration depends largely on the final landing site, and the most important factor of landing site selection is the safety of lander, so, hazard detection and avoidance are crucial during asteroid landing. Many approaches have been proposed at present, most of them just detect hazard and select an area that is free of hazard threaten, however, in some cases, the selected
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A New Simple Model of Comets-Like Activity of Centaurs Earth Moon Planets (IF 0.9) Pub Date : 2018-07-01 M. Wesołowski, P. Gronkowski
Outbursts and variations of brightness are well known manifestations of the physical activity of the comets. Most cometary outbursts are recorded not very far from the Sun, where sublimation of water ice plays a major role in the activity of this celestial bodies. However, comets sometimes show physical activity far from the Sun, where the rate of water ice sublimation is small. Also a special kind
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The Central Symmetry Analysis of Wrinkle Ridges in Lunar Mare Serenitatis Earth Moon Planets (IF 0.9) Pub Date : 2018-03-01 Meijuan Yao, Jianping Chen
Wrinkle ridges are one of the most common structures usually found in lunar mare basalts, and their formations are closely related to the lunar mare. In this paper, wrinkle ridges in Mare Serenitatis were identified and mapped via high-resolution data acquired from SELENE, and a quantitative method was introduced to analyze the degree of central symmetry of the wrinkle ridges distributed in a concentric
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Remote Sensing of Mars: Detection of Impact Craters on the Mars Global Surveyor DTM by Integrating Edge- and Region-Based Algorithms Earth Moon Planets (IF 0.9) Pub Date : 2018-03-01 C. D. Athanassas, A. Vaiopoulos, P. Kolokoussis, D. Argialas
This study integrates two different computer vision approaches, namely the circular Hough transform (CHT) and the determinant of Hessian (DoH), to detect automatically the largest number possible of craters of any size on the digital terrain model (DTM) generated by the Mars Global Surveyor mission. Specifically, application of the standard version of CHT to the DTM captured a great number of craters
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Incoherent Scatter Radar Studies of Daytime Plasma Lines Earth Moon Planets (IF 0.9) Pub Date : 2018-03-01 Frank T. Djuth, Herbert C. Carlson, Liwei D. Zhang
First results from wideband (electron phase energies of 5–51 eV), high-resolution (0.1 eV) spectral measurements of photoelectron–enhanced plasma lines made with the 430 MHz radar at Arecibo Observatory are presented. In the F region, photoelectrons produced by solar EUV line emissions (He II and Mg IX) give rise to plasma line spectral peaks/valleys. These and other structures occur within an enhancement
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Patterns Formation in a Self-Gravitating Isentropic Gas Earth Moon Planets (IF 0.9) Pub Date : 2017-12-27 Mayer Humi
In this paper we consider a hydrodynamic model for the matter density distribution in a self gravitating, isentropic 2-d disk of gas where the isentropy coefficient is allowed to be a function of position. For this model we prove analytically the existence of steady state and time dependent solutions in which the matter density in the disk is oscillatory and pattern forming. This research is motivated
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Range-Doppler Mapping of Space-Based Targets Using the JRO 50 MHz Radar Earth Moon Planets (IF 0.9) Pub Date : 2017-12-01 S. Kesaraju, J. D. Mathews, M. Milla, J. Vierinen
The Jicamarca Radio Observatory (JRO) two-dimensional square array radar system operating at ~ 6-m wavelength was used to study the Moon and low Earth orbit satellites using the Range-Doppler inverse synthetic aperture radar technique also known as Delay-Doppler imaging. The radar data was collected on Oct 21, 2015. A circularly polarized coded pulse was transmitted from a quarter-array antenna segment
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Automated Meteor Detection by All-Sky Digital Camera Systems Earth Moon Planets (IF 0.9) Pub Date : 2017-12-01 Tomáš Suk, Stanislava Šimberová
We have developed a set of methods to detect meteor light traces captured by all-sky CCD cameras. Operating at small automatic observatories (stations), these cameras create a network spread over a large territory. Image data coming from these stations are merged in one central node. Since a vast amount of data is collected by the stations in a single night, robotic storage and analysis are essential
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Hamiltonian Formulation and Perturbations for Dust Motion Around Cometary Nuclei Earth Moon Planets (IF 0.9) Pub Date : 2017-10-27 Yu Jiang, Juergen Schmidt, Hexi Baoyin, Hengnian Li, Junfeng Li
In this paper we analyze the dynamical behavior of large dust grains in the vicinity of a cometary nucleus. To this end we consider the gravitational field of the irregularly shaped body, as well as its electric and magnetic fields. Without considering the effect of gas friction and solar radiation, we find that there exist grains which are static relative to the cometary nucleus; the positions of
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An Impacting Descent Probe for Europa and the Other Galilean Moons of Jupiter Earth Moon Planets (IF 0.9) Pub Date : 2017-08-01 P. Wurz, D. Lasi, N. Thomas, D. Piazza, A. Galli, M. Jutzi, S. Barabash, M. Wieser, W. Magnes, H. Lammer, U. Auster, L. I. Gurvits, W. Hajdas
We present a study of an impacting descent probe that increases the science return of spacecraft orbiting or passing an atmosphere-less planetary bodies of the solar system, such as the Galilean moons of Jupiter. The descent probe is a carry-on small spacecraft (<100 kg), to be deployed by the mother spacecraft, that brings itself onto a collisional trajectory with the targeted planetary body in a
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On a Novel Geometric Analysis of the Bacubirito Meteorite Earth Moon Planets (IF 0.9) Pub Date : 2017-07-31 E. Terán-Bobadilla, J. H. Abundis-Patiño, C. Añorve, C. R. Moraila, F. Ortega-Gutiérrez, M. A. Aragón-Calvo
Tridimensional model with large level of detail and reliability of the Bacubirito meteorite is determined by laser scanner measurements. By means of this model and densities published in the literature, we estimate the mass, main geometrical quantities, and regmaglypts distribution on the meteorite. A Monte Carlo method is proposed for uncertainty estimations of the derived geometrical magnitudes.
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The EURONEAR Lightcurve Survey of Near Earth Asteroids Earth Moon Planets (IF 0.9) Pub Date : 2017-07-20 O. Vaduvescu, A. Aznar Macias, V. Tudor, M. Predatu, A. Galád, Š. Gajdoš, J. Világi, H. F. Stevance, R. Errmann, E. Unda-Sanzana, F. Char, N. Peixinho, M. Popescu, A. Sonka, R. Cornea, O. Suciu, R. Toma, P. Santos-Sanz, A. Sota, J. Licandro, M. Serra-Ricart, D. Morate, T. Mocnik, M. Diaz Alfaro, F. Lopez-Martinez, J. McCormac, N. Humphries
This data paper presents lightcurves of 101 near Earth asteroids (NEAs) observed mostly between 2014 and 2017 as part of the EURONEAR photometric survey using 11 telescopes with diameters between 0.4 and 4.2 m located in Spain, Chile, Slovakia and Romania. Most targets had no published data at the time of observing, but some objects were observed in the same period mainly by B. Warner, allowing us
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About Tidal Evolution of Quasi-Periodic Orbits of Satellites Earth Moon Planets (IF 0.9) Pub Date : 2017-05-11 Sergey V. Ershkov
Tidal interactions between Planet and its satellites are known to be the main phenomena, which are determining the orbital evolution of the satellites. The modern ansatz in the theory of tidal dissipation in Saturn was developed previously by the international team of scientists from various countries in the field of celestial mechanics. Our applying to the theory of tidal dissipation concerns the
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Coverage of Mars by Probes Slightly Off the Areostationary Orbit Earth Moon Planets (IF 0.9) Pub Date : 2017-03-18 Elena Colella, Emiliano Ortore, Christian Circi, Ennio Condoleo
This paper aims at investigating the feasibility of gaining complete and continuous coverage of an extended equatorial belt of Mars, under the effects of orbital perturbations. The problem could be solved by considering a minimum number of three probes, which move slightly off the Martian Areostationary Orbit. The proposed configurations allow the achievement of the goal without entailing corrective
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Observations of Three Stellar Occultations by Comet Hale–Bopp Earth Moon Planets (IF 0.9) Pub Date : 2017-03-13 A. S. Betzler, L. B. S. Betzler
On June 12 1996 UT, three 11–12 R magnitude stars were occulted by comet Hale–Bopp. The passage of these stars through the cometary atmosphere was monitored at the Observatorio do Pico dos Dias (Brazil) using a 0.6 m telescope. We detected an absorption of starlight by the comet dust implying in a drop of $$(6\pm 1) \times 10^{-2}$$(6±1)×10-2 magnitude of occulted star XPM 152-0898466 at a minimum
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Shadow Areas Robust Matching Among Image Sequence in Planetary Landing Earth Moon Planets (IF 0.9) Pub Date : 2016-12-29 Wei Ruoyan, Ruan Xiaogang, Yu Naigong, Zhu Xiaoqing, Lin Jia
In this paper, an approach for robust matching shadow areas in autonomous visual navigation and planetary landing is proposed. The approach begins with detecting shadow areas, which are extracted by Maximally Stable Extremal Regions (MSER). Then, an affine normalization algorithm is applied to normalize the areas. Thirdly, a descriptor called Multiple Angles-SIFT (MA-SIFT) that coming from SIFT is
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Forecast of the Comet 46P/Wirtanen Meteor Shower Activity in 2017 and 2019 Earth Moon Planets (IF 0.9) Pub Date : 2016-12-21 M. P. Maslov, E. I. Muzyko
The article presents the description of possible activity from the comet 46P/Wirtanen meteor shower. The proximity of this comet to the Earth orbit in 1984–2042 increases probabily for the Earth to encounter meteoroid particles released by this comet. For the nearest years two cases of such activity are found—in 2017 and 2019 and their characteristics and circumstances are presented.
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Relative Effect of Inclinations for Moonlets in the Triple Asteroidal Systems Earth Moon Planets (IF 0.9) Pub Date : 2016-11-24 Yu Jiang, Hexi Baoyin, Yun Zhang
We present the analysis and computational results for the inclination relative effect of moonlets of triple asteroidal systems. Perturbations on moonlets due to the primary’s non-sphericity gravity, the solar gravity, and moonlets’ relative gravity are discussed. The inclination vector for each moonlet follows a periodic elliptical motion; the motion period depends on the moonlet’s semi-major axis
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Estimating False Positive Contamination in Crater Annotations from Citizen Science Data Earth Moon Planets (IF 0.9) Pub Date : 2016-11-19 P. D. Tar, MoonZoo Team, R. Bugiolacchi, N. A. Thacker, J. D. Gilmour
Web-based citizen science often involves the classification of image features by large numbers of minimally trained volunteers, such as the identification of lunar impact craters under the Moon Zoo project. Whilst such approaches facilitate the analysis of large image data sets, the inexperience of users and ambiguity in image content can lead to contamination from false positive identifications. We
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Lightcurve Analysis, Shapes and Spins of Asteroids Ermolova and Silver from Long-Term Observations Earth Moon Planets (IF 0.9) Pub Date : 2016-10-24 Marek Husárik
We present lightcurves, shapes, and 3D convex spin-axis models for two main-belt asteroids: (3657) Ermolova and (5325) Silver. The photometric data were obtained at the Skalnaté Pleso Observatory (High Tatras, Slovakia) only. The models were obtained with the lightcurve inversion process using combined dense photometric data from the apparitions in 2006, 2010, and 2013 for Ermolova and in 2006, 2010
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A Review of Cometary Outbursts at Large Heliocentric Distances Earth Moon Planets (IF 0.9) Pub Date : 2016-10-21 P. Gronkowski, M. Wesołowski
The outbursts of comets, sudden large increases in their luminosity, are still very interesting and mysterious signs of activity of this celestial bodies. Most of the cometary outbursts are taking place at heliocentric distances where sublimation of water ice plays an important role in the activity of comets. However, the phenomenon is also observed far away from the Sun (i.e. ≃5–20 au) where the sublimation
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A Search for Meteoroid Lunar Impact Generated Electromagnetic Pulses Earth Moon Planets (IF 0.9) Pub Date : 2016-10-20 Saiveena Kesaraju, John D. Mathews, Juha Vierinen, Phil Perillat, David D. Meisel
Lunar white light flashes associated with meteoroid impacts are now regularly observed using modest optical instrumentation. In this paper, we hypothesize that the developing, optically-dense hot ejecta cloud associated with these hypervelocity impacts also produce an associated complex plasma component that rapidly evolves resulting in a highly-transient electro magnetic pulse (EMP) in the VHF/UHF
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The Moon: An Archive of Small Body Migration in the Solar System Earth Moon Planets (IF 0.9) Pub Date : 2016-10-19 Katherine H. Joy, Ian A. Crawford, Natalie M. Curran, Michael Zolensky, Amy F. Fagan, David A. Kring
The Moon is an archive of impact cratering in the Solar System throughout the past 4.5 billion years. It preserves this record better than larger, more complex planets like the Earth, Mars and Venus, which have largely lost their ancient crusts through geological reprocessing and hydrospheric/atmospheric weathering. Identifying the parent bodies of impactors (i.e. asteroid bodies, comets from the Kuiper
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Prometheus Induced Vorticity in Saturn’s F Ring Earth Moon Planets (IF 0.9) Pub Date : 2016-09-08 Phil J. Sutton, Feo V. Kusmartsev
Saturn’s rings are known to show remarkable real time variability in their structure. Many of which can be associated to interactions with nearby moons and moonlets. Possibly the most interesting and dynamic place in the rings, probably in the whole Solar System, is the F ring. A highly disrupted ring with large asymmetries both radially and azimuthally. Numerically non-zero components to the curl
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Extremely Low Frequency Electromagnetic Investigation on Mars Earth Moon Planets (IF 0.9) Pub Date : 2016-07-20 Joanna Kozakiewicz, Andrzej Kulak, Jerzy Kubisz, Krzysztof Zietara
Natural electromagnetic (EM) signals of extremely low frequencies (ELF, 3 Hz–3 kHz) can be used to study many of the electromagnetic processes and properties occurring in the Martian environment. Sources of these signals, related to electrical activity in the atmosphere, are very significant since they can influence radio wave propagation on the planet, the atmospheric composition, and the ionospheric
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Treatment of Viscosity in the Shock Waves Observed After Two Consecutive Coronal Mass Ejection Activities CME08/03/2012 and CME15/03/2012 Earth Moon Planets (IF 0.9) Pub Date : 2016-07-18 Huseyin Cavus
A coronal mass ejection (CME) is one of the most the powerful activities of the Sun. There is a possibility to produce shocks in the interplanetary medium after CMEs. Shock waves can be observed when the solar wind changes its velocity from being supersonic nature to being subsonic nature. The investigations of such activities have a central place in space weather purposes, since; the interaction of
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The Northern ω-Scorpiid Meteoroid Stream: Orbits and Emission Spectra Earth Moon Planets (IF 0.9) Pub Date : 2016-07-09 Francisco A. Espartero, José M. Madiedo
We analyze the activity of the Northern ω-Scorpiid meteor shower between 2010 and 2012. For this purpose we have employed an array of low-lux CCD video cameras and spectrographs deployed at different astronomical observatories in Spain. As a result of our survey, the atmospheric trajectory and radiant position of 11 of these meteor events were obtained. The tensile strength and orbital parameters of
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Predictions for Dusty Mass Loss from Asteroids During Close Encounters with Solar Probe Plus Earth Moon Planets (IF 0.9) Pub Date : 2016-06-11 Steven R. Cranmer
The Solar Probe Plus (SPP) mission will explore the Sun’s corona and innermost solar wind starting in 2018. The spacecraft will also come close to a number of Mercury-crossing asteroids with perihelia less than 0.3 AU. At small heliocentric distances, these objects may begin to lose mass, thus becoming “active asteroids” with comet-like comae or tails. This paper assembles a database of 97 known Mercury-crossing