Results 41 to 50 of about 76 (50)

Unusual Space Weathering on a CE-5 Metal Grain Indicates Deceptive Surface Signatures of M-type Asteroids

The Astrophysical Journal Letters
M-type asteroids are historically thought to be exposed metallic cores of differentiated planets with a composition dominated by pure iron and nickel. However, recent spectral and radar observations reveal an insufficient number of M-type asteroids in ...
Tian Zhang, Hong Tang, Xiongyao Li, Yuanyun Wen, Bing Mo, Wen Yu, Chuanjiao Zhou, Jianzhong Liu   +7 more
doaj   +1 more source

Methods for Experimental Planetary Geology in Reduced-gravity Parabolic Flight: A Case Study of Researching Impact Crater Ejecta

The Planetary Science Journal
Geologists have long conducted laboratory experiments to offer a controlled environment for understanding processes that occur in nature and linking those processes with natural geologic landforms.
Kirby D. Runyon, Daniel D. Durda, Viliam Klein, Constantine C. C. Tsang, Chloe B. Beddingfield, Carolyn M. Ernst, Olivier S. Barnouin, H. Todd Smith   +7 more
doaj   +1 more source

3 μm Phase Curves of Main-belt Asteroids from NEOWISE Photometry

The Planetary Science Journal
The shapes of asteroid phase curves are influenced by the physical properties of asteroid surfaces. The variation of an asteroid’s brightness as a function of the solar phase angle can tell us about surface properties such as grain size distribution ...
Matthew Varakian, Nancy Chanover, Joseph Masiero, Dagmara Oszkiewicz   +3 more
doaj   +1 more source

Rotationally Resolved Mid-infrared Spectroscopy of (16) Psyche

The Planetary Science Journal
Asteroid (16) Psyche is theorized to be an exposed iron core of a primordial asteroid and is the target of the upcoming NASA Psyche mission. Recent observations of Psyche identified the presence of rotational heterogeneity, a fine-grained regolith ...
Anicia Arredondo, Margaret M. McAdam, Tracy M. Becker, Linda Elkins-Tanton, Zoe Landsman, Thomas Müller   +5 more
doaj   +1 more source

Comprehensive Study of Near-Earth Asteroid 2024 MK: Testing Planetary Encounters as a Source for Surface Refreshing

The Astrophysical Journal Letters
Near-Earth object 2024 MK was discovered on 2024 June 16, less than 2 weeks before it made a sub-lunar-distance close approach. This close approach provided an ideal opportunity to determine how planetary encounters affect asteroid surfaces in ...
Lauren E. McGraw, Cristina A. Thomas, Tim A. Lister, Becky J. Williams, Andy S. Rivkin, Bryan Holler, Leslie A. Young   +6 more
doaj   +1 more source

Rocks with Extremely Low Thermal Inertia at the OSIRIS-REx Sample Site on Asteroid Bennu

The Planetary Science Journal
The Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission recently returned a sample of rocks and dust collected from asteroid Bennu. We analyzed the highest-resolution thermal data obtained by the
Andrew J. Ryan, Benjamin Rozitis, Daniel Pino Munoz, Kris J. Becker, Joshua P. Emery, Michael C. Nolan, Marc Bernacki, Marco Delbo, Catherine M. Elder, Matthew Siegler, Erica R. Jawin, Dathon R. Golish, Kevin J. Walsh, Christopher W. Haberle, Carina A. Bennett, Kenneth L. Edmundson, Victoria E. Hamilton, Phillip R. Christensen, Michael G. Daly, Dante S. Lauretta   +19 more
doaj   +1 more source

Candidate Main-belt Asteroids for Surface Heterogeneity

The Astronomical Journal
Large terrestrial bodies in our solar system like the Earth, Mars, Mercury, and the Moon exhibit geologically complex surfaces with compositional heterogeneity.
Sunao Hasegawa, Michaël Marsset, Francesca E. DeMeo, Josef Hanuš, Richard P. Binzel, Schelte J. Bus, Brian Burt, David Polishook, Cristina A. Thomas, Jooyeon Geem, Masateru Ishiguro, Daisuke Kuroda, Pierre Vernazza   +12 more
doaj   +1 more source

Experimental Method for Measuring Cohesion of Regolith via Electrostatic Lofting

The Planetary Science Journal
The hypothesized electrostatic lofting of individual regolith grains on the Moon and asteroids has been investigated extensively in laboratory studies. Cohesion may dominate how regolith behaves on these small, airless bodies, yet the magnitude of this ...
Charles T. Pett, Christine M. Hartzell
doaj   +1 more source

The Unusual Brightness Phase Curve of (65803) Didymos

The Planetary Science Journal
On 2022 September 26, NASA's Double Asteroid Redirection Test (DART) successfully hit Dimorphos, the smaller companion of the binary system formed with the asteroid (65803) Didymos.
P. H. Hasselmann, V. Della Corte, P. Pravec, S. Ieva, I. Gai, D. Perna, J. D. P. Deshapriya, E. Mazzotta-Epifani, E. Dotto, A. Zinzi, G. Poggiali, I. Bertini, A. Lucchetti, M. Pajola, J. Beccarelli, M. Dall’Ora, J.-Y. Li, S. L. Ivanovski, A. Rossi, J. R. Brucato, C. A. Thomas, O. Barnouin, J. M. Sunshine, A. S. Rivkin, M. Amoroso, A. Capannolo, S. Caporali, M. Ceresoli, G. Cremonese, R. T. Daly, G. Impresario, R. Lasagni-Manghi, M. Lavagna, D. Modenini, E. E. Palmer, P. Palumbo, S. Pirrotta, P. Tortora, M. Zannoni, G. Zanotti   +39 more
doaj   +1 more source

Surface Properties of the Kalliope–Linus System from ALMA and VLA Data

The Planetary Science Journal
The abundance and distribution of metal in asteroid surfaces can be constrained from thermal emission measurements at radio wavelengths, informing our understanding of planetesimal differentiation processes.
Katherine de Kleer, Saverio Cambioni, Bryan Butler, Michael Shepard   +3 more
doaj   +1 more source