Results 21 to 30 of about 5,498 (201)

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

ASTEROIDI

Rudarsko-geološko-naftni zbornik, 2016
Asteroidi su najveća mala tijela Sunčeva sustava. Danas se intenzivno proučavaju iz nekoliko razloga. Kao prvo, neki asteroidi (tzv. NEA podvrsta) mogu se sudariti sa Zemljom, a posljedice takva sudara bile bi katastrofalne. Drugo, na njih se gleda kao na potencijalni izvor materijala koji na Zemlji postaju rijetki, a koji će ionako biti potrebni za ...
openaire   +4 more sources

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

Design and ballistic analysis of the mission for long-term study of the asteroid Apophis by a nanosatellite with an electric rocket propulsion system

Космические аппараты и технологии, 2020
The paper considers non-spherical objects with low gravitational attraction, such as asteroids, satellites of the planet and comets. We considered possibility of a mission to small bodies of the solar system of irregular shape on the example of the ...
O. L. Starinova, E. A. Sergaeva, A. Yu. Shornikov   +2 more
doaj   +1 more source

Feed-Forward Neural Network Denoising Applied to Goldstone Solar System Radar Images

Remote Sensing, 2022
The study of Near-Earth Asteroids (NEA) is crucial for human safety. Small hazardous asteroids with small radar cross sections are not easy to detect, track, and characterize due to the small signal-to-noise ratio (SNR) of the radar echo. This manuscript
Nereida Rodriguez-Alvarez, Joseph S. Jao, Joan Francesc Munoz-Martin, Clement G. Lee, Kamal Oudrhiri   +4 more
doaj   +1 more source

MONET: The Minor Body Generator Tool at DART Lab

Sensors
Minor bodies exhibit considerable variability in shape and surface morphology, posing challenges for spacecraft operations, which are further compounded by highly non-linear dynamics and limited communication windows with Earth.
Carmine Buonagura, Mattia Pugliatti, Francesco Topputo   +2 more
doaj   +1 more source

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
doaj   +1 more source

Planetary defense with the Double Asteroid Redirection Test (DART) mission and prospects

Nature Communications, 2023
NASA’s Double Asteroid Redirection Test (DART) mission intentionally impacted the asteroid Dimorphos on September 26, 2022, and this kinetic impact changed Dimorphos’ orbit around its binary companion Didymos.
Andrew S. Rivkin, Andrew F. Cheng
doaj   +1 more source

Modelling Detection Distances to Small Bodies Using Spacecraft Cameras

Modelling, 2023
Small bodies in the Solar System are appealing targets for scientific and technological space missions, owing to their diversity in intrinsic and extrinsic properties, besides orbit and other factors.
Vittorio Franzese, Andreas Makoto Hein
doaj   +1 more source

THE ACTIVE ASTEROIDS [PDF]

The Astronomical Journal, 2012
42, pages, 9 figures, The Astronomical Journal, in ...
openaire   +2 more sources