Results 41 to 50 of about 79,926 (240)

Celestial Bodies Far-Range Detection with Deep-Space CubeSats

Sensors, 2023
Detecting celestial bodies while in deep-space travel is a critical task for the correct execution of space missions. Major bodies such as planets are bright and therefore easy to observe, while small bodies can be faint and therefore difficult to ...
Vittorio Franzese, Francesco Topputo
doaj   +1 more source

Effect of rotational disruption on the size-frequency distribution of the Main Belt asteroid population

, 2014
The size distribution of small asteroids in the Main Belt is assumed to be determined by an equilibrium between the creation of new bodies out of the impact debris of larger asteroids and the destruction of small asteroids by collisions with smaller ...
Davis, Donald R., Jacobson, Seth A., Marzari, Francesco, Rossi, Alessandro, Scheeres, Daniel J.   +4 more
core   +1 more source

Predicting Performance of Hall Effect Ion Source Using Machine Learning

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This study introduces HallNN, a machine learning tool for predicting Hall effect ion source performance using a neural network ensemble trained on data generated from numerical simulations. HallNN provides faster and more accurate predictions than numerical methods and traditional scaling laws, making it valuable for designing and optimizing Hall ...
Jaehong Park, Guentae Doh, Dongho Lee, Youngho Kim, Changmin Shin, Su‐Jin Shin, Young‐Chul Ghim, Sanghoo Park, Wonho Choe   +8 more
wiley   +1 more source

Spectral and Spin Measurement of Two Small and Fast-Rotating Near-Earth Asteroids

, 2012
In May 2012 two asteroids made near-miss "grazing" passes at distances of a few Earth-radii: 2012 KP24 passed at nine Earth-radii and 2012 KT42 at only three Earth-radii. The latter passed inside the orbital distance of geosynchronous satellites.
Binzel, R. P., Bus, S. J., DeMeo, F. E., Golisch, W., Gulbis, A. A. S., Lockhart, M., Polishook, D.   +6 more
core   +1 more source

Crater Observing Bioinspired Rolling Articulator (COBRA)

Advanced Intelligent Systems, EarlyView.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame, Henry Noyes, Eric Sihite, Arash Kalantari, Alireza Ramezani   +4 more
wiley   +1 more source

Mining the ESO WFI and INT WFC archives for known Near Earth Asteroids. Mega-Precovery software

, 2013
The ESO/MPG WFI and the INT WFC wide field archives comprising 330,000 images were mined to search for serendipitous encounters of known Near Earth Asteroids (NEAs) and Potentially Hazardous Asteroids (PHAs).
Badea, M., Badescu, T., Birlan, M., Char, F., Comsa, I., Constantinescu, M., Lacatus, D., Opriseanu, C., Paraschiv, A., Popescu, M., Sonka, A., Suciu, O., Tudorica, A., Vaduvescu, O., Vidican, D.   +14 more
core   +3 more sources

Boosting decision trees for the selection of main belt asteroids in planetary ephemerides: An alternative model

Astronomy & Astrophysics
Context. One of the main bottlenecks in assessing the accuracy of the Mars orbit is the unknown value of the asteroids in the main asteroid belt. A modeling with 343 asteroids as point masses is used today, with the relative masses fit to observational ...
Mariani Vincenzo, Fienga Agnès, Murray Zachary, Gastineau Mickaël, Laskar Jacques   +4 more
doaj   +1 more source

The 3-4 $\mu$m Spectra of Jupiter Trojan Asteroids [PDF]

, 2016
To date, reflectance spectra of Jupiter Trojan asteroids have revealed no distinctive absorption features. For this reason, the surface composition of these objects remains a subject of speculation. Spectra have revealed, however, that the Jupiter Trojan
Brown, Michael E.
core   +2 more sources

BVRI photometry of 53 unusual asteroids

, 2010
We present the results of BVRI photometry and classification of 53 unusual asteroids, including 35 near-Earth asteroids (NEAs), 6 high eccentricity/inclination asteroids, and 12 recently-identified asteroid-pair candidates.
Betzler, Binzel, Hicks, Q.-z. Ye, Skrutskie, Taylor, Tedesco, Tholen, Trilling, Vokrouhlický, Warner   +10 more
core   +1 more source

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source