Results 31 to 40 of about 37,088 (220)
Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes [PDF]
, 2011 Asteroid sizes can be directly measured by observing occultations of stars by asteroids. When there are enough observations across the path of the shadow, the asteroid's projected silhouette can be reconstructed. Asteroid shape models derived from photometry by the lightcurve inversion method enable us to predict the orientation of an asteroid for the ...
arxiv +1 more source
Rudarsko-geološko-naftni zbornik, 2016 Asteroids are the largest minor bodies in the Solar System. Nowadays they are in the research focus due to several facts about them: first, a subclass of asteroids can collide with Earth, and consequences of such a collision are dramatic. Second, they are now seen as source of materials that are becoming scarce on Earth, and they will be needed in ...
openaire +3 more sources
GeosciencesThe Hayabusa2 space mission recently retrieved 5.4 g of material from asteroid Ryugu, providing the first direct access to pristine material from a carbonaceous asteroid. This study employs a novel combination of non-invasive synchrotron X-ray techniques
Paul Northrup +8 more
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THE CONDITIONS FOR APOPHIS 99942 APPROACHING EARTH IN 2029
Odessa Astronomical Publications, 2009 The discovery of Apophis 99942 asteroid in 2004 raised a number of questions in the sphere of the asteroid threatening. On April 13, 2029, the asteroid is to pass at a close distance from Earth.
A. A. Tokovenko, А. А. Bazey
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Asteroid Photometric Phase Functions From Bayesian Lightcurve Inversion
Frontiers in Astronomy and Space Sciences, 2022 Photometry is an important tool for characterizing the physical properties of asteroids. An asteroid’s photometric lightcurve and phase curve refer to the variation of the asteroid’s disk-integrated brightness in time and in phase angle (the Sun-asteroid-
Karri Muinonen +7 more
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Asteroid mass estimation using Markov-chain Monte Carlo [PDF]
, 2017 Estimates for asteroid masses are based on their gravitational perturbations on the orbits of other objects such as Mars, spacecraft, or other asteroids and/or their satellites. In the case of asteroid-asteroid perturbations, this leads to an inverse problem in at least 13 dimensions where the aim is to derive the mass of the perturbing asteroid(s) and
arxiv +1 more source
AerospaceThe increasing need for autonomy in space exploration missions is becoming more and more relevant in the design of missions to small bodies. The long communication latencies and sensitivity of the system to unplanned environmental perturbations mean ...
Pelayo Peñarroya +3 more
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Aerospace, 2022 This paper investigates the issue of balance control for reaction-wheeled inverted pendulum-type Cubli Rovers on asteroids, and an adaptive control scheme is proposed via the prescribed performance control technique.
He Huang +5 more
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Thermochemical equilibrium calculations of high-temperature O2 generation on the early Earth: Giant asteroid impacts on land [PDF]
Journal of the Serbian Chemical Society, 2003 Earths atmosphere is composed primarily of N2 and O2. The origin of free O2 in the early Earths atmosphere is still subject of considerable debate.1 Theoretical models suggest that the initial form of free O2 in the atmosphere has been oceanic H2O ...
PAVLE I. PREMOVIC
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Organic Matter in the Asteroid Ryugu: What We Know So Far
Life, 2023 The Hayabusa2 mission was tasked with returning samples from the C-complex asteroid Ryugu (1999 JU3), in order to shed light on the formation, evolution and composition of such asteroids.
Christian Potiszil +8 more
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