Results 1 to 10 of about 157 (99)
Can Asteroid Belts Exist in the Luyten’s System?
Universe, 2022 The extra-solar planetary system Luyten is relatively close (12.3 light years) to our Sun. The Luyten’s red dwarf star is orbited by four planets, two of them Earth-like (in mass) and in 4:1 resonance.
Mattia Galiazzo +2 more
doaj +1 more source
The Planetary Science Journal, 2023 Asteroid diameters are traditionally difficult to estimate. When a direct measurement of the diameter cannot be made through either occultation or direct radar observations, the most common method is to approximate the diameter from infrared observations.
Zachary Murray
doaj +1 more source
The physical and dynamical characteristics of the asteroid 4940 Polenov [PDF]
Serbian Astronomical Journal, 2021 The asteroid (1986 QY4) 4940 Polenov is the first Solar system object whose 3D shape is determined using the observations from the newly built Astronomical Station Vidojevica (ASV).
Vchkova-Bebekovska E. +5 more
doaj +1 more source
The First Instrumentally Documented Fall of an Iron Meteorite: Orbit and Possible Origin
The Astrophysical Journal, 2023 A bright fireball observed on 2020 November 7, over Scandinavia, produced the first iron meteorite with a well-determined pre-atmospheric trajectory.
Ihor Kyrylenko +7 more
doaj +1 more source
Ryugu’s observed volatile loss did not arise from impact heating alone
Communications Earth & Environment, 2021 The loss of volatile material from asteroid Ryugu was not caused solely by heating from hypervelocity impacts as previously believed, suggest impact experiments conducted at speeds comparable to those expected in the main asteroid ...
Kosuke Kurosawa +5 more
doaj +1 more source
The breakup of the L-chondrite parent body 466 Ma and its terrestrial effects – a search for a mid-Ordovician biodiversity event [PDF]
Estonian Journal of Earth Sciences, 2023 About a third of all meteorites that fall on Earth today, the stony L-chondrites, originate from a major breakup event in the asteroid belt 466 Ma, in the early Darriwilian.
Birger Schmitz, Fredrik Terfelt
doaj +1 more source
Terrestrial planet and asteroid belt formation by Jupiter–Saturn chaotic excitation
Scientific Reports, 2023 The terrestrial planets formed by accretion of asteroid-like objects within the inner solar system’s protoplanetary disk. Previous works have found that forming a small-mass Mars requires the disk to contain little mass beyond ~ 1.5 au (i.e., the disk ...
Patryk Sofia Lykawka, Takashi Ito
doaj +1 more source
Thermophysical Investigation of Asteroid Surfaces. II. Factors Influencing Grain Size
The Planetary Science Journal, 2022 Asteroid surfaces are subjected to mechanical weathering processes that result in the development and evolution of regolith. Two proposed mechanisms—impact bombardment and thermal fatigue—have been proposed as viable and dominant weathering processes ...
Eric M. MacLennan, Joshua P. Emery
doaj +1 more source
Recent arrivals to the main asteroid belt [PDF]
Celestial Mechanics and Dynamical Astronomy, 2022 AbstractThe region where the main asteroid belt is now located may have started empty, to become populated early in the history of the Solar system with material scattered outward by the terrestrial planets and inward by the giant planets. These dynamical pathways toward the main belt may still be active today.
Carlos de la Fuente Marcos +1 more
openaire +3 more sources
Planets in the asteroid belt [PDF]
Meteoritics & Planetary Science, 2001 Abstract— The main asteroid belt has lost >99.9% of its solid mass since the time at which the planets were forming, according to models for the protoplanetary nebula. Here we show that the primordial asteroid belt could have been cleared efficiently if much of the original mass accreted to form planetsized bodies, which were capable of perturbing ...
George W. Wetherill +2 more
openaire +2 more sources