Results 21 to 30 of about 89,298 (260)

On the origin of the Almahata-Sitta meteorite and 2008TC3 asteroid [PDF]

, 2012
Asteroid 2008TC3 was a Near Earth Asteroid that impacted the Earth on 2008 October 7. Meteorites were produced by the break-up of 2008TC3 in the high atmosphere and at present, about 600 meteorites - called Almahata Sitta - coming from 2008TC3 have been ...
Alessandro Morbidelli, Binzel, Bischoff, Bottke, Bottke, Bottke, Bus, Campins, Cellino, Chapman, Clark, Clark, Cloutis, De Leon, Gaffey, Gaffey, Galluccio, Galluccio, Gopel, Hiroi, Horstmann, Ida, Ivanov, Ivezić, Jenniskens, Jenniskens, Johansen, Johansen, Jordi, Julie Gayon-Markt, Kenyon, Marchi, Marco Delbo, Meibom, Melosh, Michel, Mignard, Morbidelli, Morbidelli, Morbidelli, Nesvorný, Paolicchi, Parker, Shaddad, Simone Marchi, Singletary, Spurný, Vernazza, Vokrouhlický, Walsh, Weidenschilling, Welten, Wetherill, Wetherill   +53 more
core   +2 more sources

Perspective: Something Old, Something New? Review of Wasting and Other Mortality in Asteroidea (Echinodermata)

Frontiers in Marine Science, 2019
Asteroids (Echinodermata) experience mass mortality events that have the potential to cause dramatic shifts in ecosystem structure. Asteroid wasting describes a suite of body wall abnormalities that can ultimately result in animal mortality.
Ian Hewson, Brooke Sullivan, Elliot W. Jackson, Qiang Xu, Hao Long, Chenggang Lin, Eva Marie Quijano Cardé, Justin Seymour, Nachshon Siboni, Matthew R. L. Jones, Mary A. Sewell   +10 more
doaj   +1 more source

Thermography of Asteroid and Future Applications in Space Missions

Applied Sciences, 2020
The Near-Earth Asteroid 162173 Ryugu is a C-type asteroid which preserves information about the ancient Solar System and is considered enriched in volatiles such as water and organics associated with the building blocks of life, and it is a potentially ...
Tatsuaki Okada
doaj   +1 more source

Prescribed Performance Adaptive Balance Control for Reaction Wheel-Based Inverted Pendulum-Type Cubli Rovers in Asteroid

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, Zejian Li, Zongyi Guo, Jianguo Guo, Le Suo, Haoliang Wang   +5 more
doaj   +1 more source

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, Masahiro Yamanaka, Chie Sakaguchi, Tsutomu Ota, Hiroshi Kitagawa, Tak Kunihiro, Ryoji Tanaka, Katsura Kobayashi, Eizo Nakamura   +8 more
doaj   +1 more source

Experimental Observation of a Calcium Silicon Double Carbonate

Angewandte Chemie, EarlyView.
High‐pressure and ‐temperature reactions between Ca5(Si2O7)(CO3)2 tilleyite and CO2 carbon dioxide yield the first experimental evidence of the double carbonate Ca2Si(CO3)4 and a new Ca2(C4O10) phase containing tetrahedral [CO4] units. These findings reveal unexpected carbonate chemistry and highlight pathways for carbon incorporation under mantle ...
Benedito Donizeti Botan‐Neto, David Santamaria‐Perez, Julia Bungarten, Lkhamsuren Bayarjargal, Björn Winkler, Alberto Otero‐de‐la‐Roza, Bihan Wang   +6 more
wiley   +2 more sources

Chemistry in Retrieved Ryugu Asteroid Samples Revealed by Non-Invasive X-ray Microanalyses: Pink-Beam Fluorescence CT and Tender-Energy Absorption Spectroscopy

Geosciences
The 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, Ryan Tappero, Timothy D. Glotch, George J. Flynn, Mehmet Yesiltas, Yoko Kebukawa, Leonard Flores, Marina E. Gemma, Gavin Piccione   +8 more
doaj   +1 more source

A Fully Autonomous On-Board GNC Methodology for Small-Body Environments Based on CNN Image Processing and MPCs

Aerospace
The 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, Alfredo Escalante, Thomas Frekhaug, Manuel Sanjurjo   +3 more
doaj   +1 more source

Short-Term Consequences of Asteroid Impacts into the Ocean: A Portuguese Case Study

Universe, 2022
Asteroid impacts are a proven global threat, meaning that any location on Earth might be a subject to their consequences. Such collisions are not likely in any person’s lifetime, but their aftermath could be catastrophic.
Renato H. Morais, Luís F. F. M. Santos, André R. R. Silva, Rui Melicio   +3 more
doaj   +1 more source

Asteroid taxonomic signatures from photometric phase curves

, 2012
We explore the correlation between an asteroid's taxonomy and photometric phase curve using the H, G12 photometric phase function, with the shape of the phase function described by the single parameter G12.
Antti Penttilä, Barucci, Belskaya, Binzel, Bus, Capaccioni, Cellino, Cristina A. Thomas, Dagmara Anna Oszkiewicz, David E. Trilling, DeMeo, Edward Bowell, Florczak, Florczak, Gehrels, Goidet-Devel, Gradie, Harris, Harris, Howell, Ivežić, Kaasalainen, Kaasalainen, Karri Muinonen, L.H. Wasserman, Lagerkvist, Lazzaro, Lazzaro, Mothé-Diniz, Mothé-Diniz, Muinonen, Muinonen, Nelder, Oszkiewicz, Parker, Scaltriti, Tedesco, Thomas, Tuomo Pieniluoma, Xu, Yoshida   +40 more
core   +1 more source