Results 51 to 60 of about 6,852,218 (267)
The Secular Dynamical Evolution of Binary Asteroid System (65803) Didymos Post-DART
The Planetary Science JournalThe successful impact of NASA’s DART mission with Dimorphos, the secondary body of binary asteroid system (65803) Didymos, altered the attitude, shape, and orbit of Dimorphos.
Rachel H. Cueva +7 more
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OBSERVED ASTEROID SURFACE AREA IN THE THERMAL INFRARED [PDF]
The Astronomical Journal, 2017 ABSTRACT The rapid accumulation of thermal infrared observations and shape models of asteroids has led to increased interest in thermophysical modeling. Most of these infrared observations are unresolved. We consider what fraction of an asteroid’s surface area contributes the bulk of the emitted thermal flux for two model asteroids of ...
C. R. Nugent +7 more
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Q-type asteroids: Possibility of non-fresh weathered surfaces [PDF]
Nippon Tenmon Gakkai obun kenkyu hokoku, 2019 Itokawa particles, which are samples recovered from the S-complex asteroid 25143 Itokawa by the Hayabusa spacecraft, demonstrate that S-complex asteroids are parent bodies of ordinary chondrite meteorites.
S. Hasegawa +6 more
semanticscholar +1 more source
Boulders on asteroid Toutatis as observed by Chang’e-2 [PDF]
Scientific Reports, 2015 Boulders are ubiquitously found on the surfaces of small rocky bodies in the inner solar system and their spatial and size distributions give insight into the geological evolution and collisional history of the parent bodies. Using images acquired by the
Yun Jiang +5 more
semanticscholar +1 more source
Dynamic 3D Simulation of Surface Charging on Rotating Asteroids
The Astrophysical JournalThe surface-charging phenomenon of asteroids, mainly resulting from solar wind plasma and solar radiation, has been extensively studied. However, the influence of the asteroid’s rotation on surface charging is not yet fully understood.
Ronghui Quan, Zhiying Song, Zhigui Liu
doaj +1 more source
Early evolutionary history of the seed
Biological Reviews, EarlyView.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Surface Compositions of Trojan Asteroids
Space Science ReviewsAbstractThe Jupiter Trojan asteroids are a key population for understanding the chemical and dynamical evolution of the Solar System. Surface compositions of Trojans, in turn, provide crucial information for reconstructing their histories. NASA’s Lucy mission will soon complete the first spacecraft reconnaissance of this population.
Joshua P. Emery +8 more
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Regolith mechanics on Asteroid surfaces
, 2017 Introduction: It is very likely that most aster- oids surfaces are covered by a regolith layer. We are focussing on the mechanical properties of such regolith, i.e., a granular material under micro-gravity (µ-g) conditions. Any operations on asteroids that are not remote, need to interact mechanically with the surface material, and for resource ...
Biele, Jens, Ulamec, Stephan
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Episodes of particle ejection from the surface of the active asteroid (101955) Bennu
Science, 2019 Bennu ejects material from its surface Most asteroids appear inert, but remote observations show that a small number experience mass loss from their surfaces. Lauretta and Hergenrother et al.
D. Lauretta +59 more
semanticscholar +1 more source
DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche [PDF]
, 2016 In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 μm spectral region using the long-wavelength cross-dispersed (LXD: 1.9–4.2 μm) mode of the SpeX spectrograph/imager at the NASA Infrared ...
D. Takir +4 more
semanticscholar +1 more source