Results 301 to 310 of about 128,595 (322)
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Mesosiderite formation on asteroid 4 Vesta by a hit-and-run collision
Nature Geoscience, 2019Collision and disruption processes of protoplanetary bodies in the early Solar System are key to understanding the genesis of diverse types of main-belt asteroids.
M. Haba +4 more
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Icarus, 1995
Abstract Asteroid 2953 Vysheslavia, a Koronis family member about 15 km in diameter, very close to the outer edge of the 5/2 Kirkwood gap, has been shown by numerical integrations to fall into the resonance; then it approaches Jupiter and ends up into a hyperbolic orbit. The typical dynamical lifetime is of the order of 10 Myr.
MILANI COMPARETTI, ANDREA +1 more
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Abstract Asteroid 2953 Vysheslavia, a Koronis family member about 15 km in diameter, very close to the outer edge of the 5/2 Kirkwood gap, has been shown by numerical integrations to fall into the resonance; then it approaches Jupiter and ends up into a hyperbolic orbit. The typical dynamical lifetime is of the order of 10 Myr.
MILANI COMPARETTI, ANDREA +1 more
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Vestnik oftal'mologii, 2019
The article analyzes existing information on clinical and experimental studies of vitreous changes in asteroid hyalosis, historical aspects of how this condition was studied over the past hundred years, its occurrence and pathogenesis. Results of various studies were used to evaluate current understanding of the forms and elemental composition of ...
S I, Kharlap +3 more
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The article analyzes existing information on clinical and experimental studies of vitreous changes in asteroid hyalosis, historical aspects of how this condition was studied over the past hundred years, its occurrence and pathogenesis. Results of various studies were used to evaluate current understanding of the forms and elemental composition of ...
S I, Kharlap +3 more
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2002
"We are now on the threshold of a new era of asteroid studies," wrote Tom Gehrels in 1971 (Gehrels, 1971). These words proved quite prophetic for the three decades of physical observations and theoretical understanding that followed. As the third century of asteroid research has begun in 2001, we can once again picture ourselves standing on a new ...
BOTTKE J.R. W. F. +3 more
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"We are now on the threshold of a new era of asteroid studies," wrote Tom Gehrels in 1971 (Gehrels, 1971). These words proved quite prophetic for the three decades of physical observations and theoretical understanding that followed. As the third century of asteroid research has begun in 2001, we can once again picture ourselves standing on a new ...
BOTTKE J.R. W. F. +3 more
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Gut, 2010
During transarterial embolisation of a patient with hepatocellular carcinoma (HCC), a medical student learnt during his bedside teaching lesson that haematogenous metastasis may occur in cases with HCC. After this interventional procedure the medical student saw the catheter that had been used. This prompted him to use microscopy to analyse a …
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During transarterial embolisation of a patient with hepatocellular carcinoma (HCC), a medical student learnt during his bedside teaching lesson that haematogenous metastasis may occur in cases with HCC. After this interventional procedure the medical student saw the catheter that had been used. This prompted him to use microscopy to analyse a …
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Rapid Generation of Time-Optimal Trajectories for Asteroid Landing via Convex Optimization
, 2017This paper presents a new method for rapid generation of time-optimal trajectories for asteroid landing via convex optimization. To overcome the nonconvex difficulty due to the free-flight time, a minimum-landing-error problem that can be convexified is ...
Hongwei Yang, X. Bai, H. Baoyin
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Collisions of Asteroids: Asteroid (596) Sheila
Astrophysical Bulletin, 2019Among the small bodies of the Solar System, at present, a group of bodies, called comets of the main belt, exhibiting dynamic and/or physical properties of both comets and asteroids is distinguished. One of the reasons for such manifestations may be collisions with other bodies.
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Determination of Masses of Six Asteroids from Close Asteroid—Asteroid Encounters
2001New masses of six asteroids: (6) Hebe, (10) Hygiea, (15) Eunomia, (52) Europa, (511) Davida and (704) Interamnia were determined within the ongoing Asteroid Mass Determination Program, started in 1998 in the Wroclaw University Observatory. The masses were calculated by means of the least-squares method as weighted means of the values found separately ...
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Highly porous nature of a primitive asteroid revealed by thermal imaging
Nature, 2020T. Okada +78 more
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Asteroid-Asteroid Interactions - Dynamically Irrelevant?
1991Structural investigations of the distribution of the asteroids have so far concentrated on the interactions with the major planets, especially Jupiter, and the resulting effects in element space. Here some less known structures of their distribution in actual space are shown: the radial number density and the orthogonal orbit density.
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