Results 21 to 30 of about 5,272 (187)

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

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

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

Using Neural Networks to Model Main Belt Asteroid Albedos as a Function of Their Proper Orbital Elements

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

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

Near-Earth Asteroids as Possible Parent Bodies of Meteor Streams [PDF]

Учёные записки Казанского университета: Серия Естественные науки, 2016
The genetic relationship of meteor streams with near-Earth asteroids (NEAs) is being actively studied. A genetic link with the asteroid is possible only for streams in which meteoroids have the geocentric speed smaller than 50 km/s, thereby meaning the ...
M.G. Sokolova, M.V. Sergienko
doaj  

OBSERVATION OF ASTEROID OCCULTATIONS WITH HELP OF THE METHOD OF TEMPORAL UNSQUEEZING CCD-IMAGES IN 2006

Odessa Astronomical Publications, 2017
Description of the method of temporal unsqueezing CCD-images is presented for observations of asteroids occultations. The method was applied for observations of 9 asteroid occultations with telescope AZT - 8 (D = 0.7m, F = 2.8m) and CCD ST - 8MXE in ...
F. I. Kravtsov, I. V. Lukyanyk
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

Ultrathin, Stretchable, and 3D‐Printable Complementary Nanotubes–Polymer Composites for Multimodal Radiation Shielding in Extreme Environments

Advanced Materials, EarlyView.
A 3D‐printable dual‐mode radiation shielding material is introduced by combining boron nitride nanotubes and single‐walled carbon nanotubes in a stretchable PDMS matrix. The complementary nanotube network enables simultaneous attenuation of electromagnetic interference and neutron radiation while maintaining lightweight, mechanical resilience, and ...
Flandy, Kun Kim, Jaehyoung Ko, Daeun Kim, Daekwon Lee, Heesuk Rho, Sang Seok Lee, Dong Su Lee, Se Gyu Jang, Seokhoon Ahn, Seung‐Yeol Jeon, Dae‐Young Jeon, Yongho Joo   +12 more
wiley   +1 more source