Results 41 to 50 of about 447,866 (197)

NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos [PDF]

, 2017
The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) reactivation mission has completed its third year of surveying the sky in the thermal infrared for near-Earth asteroids and comets.
Bauer, J. M., Cutri, R. M., Grav, T., Kramer, E., Mainzer, A. K., Masiero, Joseph R., Nugent, C., Sonnett, S., Wright, E. L.   +8 more
core   +3 more sources

Size Constraint on Hayabusa2 Extended Mission Rendezvous Target 1998 KY26 via VLT/VISIR Nondetection

The Astronomical Journal
1998 KY _26 is a tiny near-Earth asteroid ( H = 26.1) discovered in 1998. It has been selected as the target of the Hayabusa2 extended mission, which will rendezvous with 1998 KY _26 in 2031.
Jin Beniyama, Thomas G. Müller, Marco Delbo, Eric Pantin, Olivier R. Hainaut, Marco Micheli, Michaël Marsset   +6 more
doaj   +1 more source

SVD-accelerated T-matrix Method for Simulation of Scattering by Electrically Large Sphere Clusters and ISAR Imaging of Asteroid-like Bodies

The Planetary Science Journal
China’s Tianwen-2 mission will carry a radar to detect the internal structure of the asteroid 469219 Kamoʻoalewa. The model of scattering from the asteroid is important for the mission.
Zhanyang Weng, Niutao Liu, Ya-Qiu Jin
doaj   +1 more source

Implications for the Formation of (155140) 2005 UD from a New Convex Shape Model

The Planetary Science Journal, 2023
(155140) 2005 UD has a similar orbit to (3200) Phaethon, an active asteroid in a highly eccentric orbit thought to be the source of the Geminid meteor shower.
Jay K. Kueny, Colin Orion Chandler, Maxime Devogéle, Nicholas Moskovitz, Petr Pravec, Hana Kučáková, Kamil Hornoch, Peter Kušnirák, Mikael Granvik, Christina Konstantopoulou, Nicholas E. Jannsen, Shane Moran, Lauri Siltala, Grigori Fedorets, Marin Ferrais, Emmanuel Jehin, Theodore Kareta, Josef Hanuš   +17 more
doaj   +1 more source

Toward a European Facility for Ground-Based Radar Observations of Near-Earth Objects

Remote Sensing, 2023
In this work, we present the preliminary results of radar observations of Near-Earth Objects (NEOs) carried out by European radio telescopes in the framework of the European Space Agency (ESA) project “NEO observation concepts for radar systems”, aimed ...
Giuseppe Pupillo, Simona Righini, Roberto Orosei, Claudio Bortolotti, Giuseppe Maccaferri, Mauro Roma, Marco Mastrogiuseppe, Tonino Pisanu, Luca Schirru, Stefano Cicalò, Antonio Tripodo, Jorma Harju, Antti Penttilä, Anne K. Virkki, Uwe Bach, Alexander Kraus, Alessio Margheri, Riccardo Ghiani, Maria N. Iacolina, Giuseppe Valente, Detlef Koschny, Richard Moissl, Gunther Sessler   +22 more
doaj   +1 more source

Pre-impact Albedo Map and Photometric Properties of the (65803) Didymos Asteroid Binary System from DART and Ground-based Data

The Planetary Science Journal
This study provides a pre-impact map of the albedo of the Double Asteroid Redirection Test (DART) target Dimorphos corrected for all the effects of viewing geometry, as well as an estimate of photometric roughness for the hemisphere imaged by DART. Other
B. J. Buratti, J. Pittichová, I. Mishra, J. K. Hillier, J. A. Mosher, S. R. Chesley, J. M. Sunshine, O. Barnouin, C. M. Ernst, R. T. Daly, J-Y Li, A. F. Cheng, A. S. Rivkin, J. Rizos   +13 more
doaj   +1 more source

Near-Earth Objects (NEO) and other current space threats

Security and Defence Quarterly, 2020
Objectives The subject of the study are space threats – Near-Earth Objects (NEO) and Potentially Hazardous Asteroids (PHA). Methods The research methods employed in this article included the classic theoretical methods used in security sciences and a
Radosław Bielawski
doaj   +1 more source

Colors and Dynamics of a Near-Sun Orbital Asteroid Family: 2021 PH27 and 2025 GN1

The Astrophysical Journal Letters
We observed the dynamically similar near-Sun asteroids 2021 PH27 and 2025 GN1 for their optical colors. These objects have the lowest known semimajor axes of any asteroids.
Scott S. Sheppard, Henry H. Hsieh, Petr Pokorný, David J. Tholen, Audrey Thirouin, Carlos Contreras, Marcelo D. Mora, Mauricio Martinez, Ivonne Toro   +8 more
doaj   +1 more source

Keck and Gemini Characterization of Hayabusa2# Rendezvous Target 1998 KY26

The Astronomical Journal
Near-Earth object (NEO) 1998 KY _26 is a target of the Hayabusa2# spacecraft, which it will rendezvous with in 2031 July. The asteroid has been noted to rotate rapidly and has a large out-of-plane nongravitational acceleration.
Bryce T. Bolin, Christoffer Fremling, Matthew Belyakov, Jin Beniyama, Marco Delbo, Robert Jedicke, Ian Wong, Laura-May Abron, Keith S. Noll, Andrew W. Stephens   +9 more
doaj   +1 more source

Interception and deviation of near Earth objects via solar collector strategy [PDF]

, 2008
A solution to the asteroid deviation problem via a low-thrust strategy is proposed. This formulation makes use of the proximal motion equations and a semi-analytical solution of the Gauss planetary equations.
Colombo, Camilla, Radice, Gianmarco, Vasile, Massimiliano   +2 more
core   +1 more source