Results 61 to 70 of about 164,857 (187)

The Hawaii Trails Project: Comet-Hunting in the Main Asteroid Belt [PDF]

, 2009
The mysterious solar system object 133P/(7968) Elst-Pizarro is dynamically asteroidal, yet displays recurrent comet-like dust emission. Two scenarios were hypothesized to explain this unusual behavior: (1) 133P is a classical comet from the outer solar system that has evolved onto a main-belt orbit, or (2) 133P is a dynamically ordinary main-belt ...
arxiv   +1 more source

Martian Impact Fracturing Pervasively Influences Habitability

Journal of Geophysical Research: Planets, Volume 129, Issue 9, September 2024.
Abstract On Mars, the lack of either plate tectonics or a prominent erosional hydrological cycle since the Noachian means geological changes caused by asteroid and comet impact events have been preserved. On Earth, surviving impact‐induced fractures are localized to the relatively few preserved craters on the planet.
C. S. Cockell, G. S. Collins, S. Basu, E. Grant, S. McMahon   +4 more
wiley   +1 more source

Lucy L′Ralph In-flight Calibration and Results at (152830) Dinkinesh

The Planetary Science Journal
The L’Ralph instrument is a key component of NASA’s Lucy mission, intended to provide spectral image data of multiple Jupiter Trojans. The instrument operates from ∼0.35 to 4 μ m using two focal plane assemblies: a 350–950 nm multispectral imager, Multi ...
Amy A. Simon, Hannah H. Kaplan, Dennis C. Reuter, Matthew Montanaro, William M. Grundy, Allen W. Lunsford, Gerald E. Weigle, Richard P. Binzel, Joshua Emery, Jessica Sunshine, Carly Howett, Harold F. Levison, Simone Marchi, Keith S. Noll, John Spencer   +14 more
doaj   +1 more source

Consus Crater on Ceres: Ammonium‐Enriched Brines in Exchange With Phyllosilicates?

Journal of Geophysical Research: Planets, Volume 129, Issue 9, September 2024.
Abstract Ceres is a partially differentiated dwarf planet located in the main asteroid belt. Consus crater (diameter ∼64 km) is one of the oldest impact features (∼450 Ma) on the Cerean surface that surprisingly still shows a large variety of color lithologies, including exposures of bright material, which are thought to be brine residues.
A. Nathues, M. Hoffmann, R. Sarkar, P. Singh, J. Hernandez, J. H. Pasckert, N. Schmedemann, G. Thangjam, E. Cloutis, K. Mengel, M. Coutelier   +10 more
wiley   +1 more source

Active Asteroids: Main-Belt Comets and Disrupted Asteroids [PDF]

arXiv, 2015
The study of active asteroids has attracted a great deal of interest in recent years since the recognition of main-belt comets (which orbit in the main asteroid belt, but exhibit comet-like activity due to the sublimation of volatile ices) as a new class of comets in 2006, and the discovery of the first disrupted asteroids (which, unlike MBCs, exhibit ...
arxiv  

Albedo Properties of Main Belt Asteroids Based on the Infrared All-Sky Survey of the Astronomical Satellite AKARI [PDF]

, 2012
We present an analysis of the albedo properties of main belt asteroids detected by the All-Sky Survey of the infrared satellite AKARI. The characteristics of 5120 asteroids detected by the survey, including their sizes and albedos, were cataloged in the Asteroid Catalog Using AKARI (AcuA). Size and albedo measurements were based on the Standard Thermal
arxiv   +1 more source

Ray and Halo Impact Craters on Ganymede: Fingerprint for Decoding Ganymede's Crustal Structure

Earth and Space Science, Volume 11, Issue 9, September 2024.
Abstract Impact craters are a unique tool not only for inferring ages of planetary surfaces and examining geological processes, but also for exploring subsurface properties. We use ejecta blankets as proxies to obtain insights into the subsurface characteristics and the vertical stratification of Ganymede's icy crust.
N. R. Baby, T. Kenkmann, K. Stephan, R. J. Wagner, E. Hauber   +4 more
wiley   +1 more source

Observational Data and Orbits of the Asteroids Discovered at the Molėtai Observatory in 2005–2007

Open Astronomy, 2016
The paper presents statistics of the asteroids observed and discovered at the Molėtai Observatory, Lithuania, in 2005–2007 within the project for astrometric observations of the near-Earth objects (NEOs), the main belt asteroids and comets.
Černis K., Wlodarczyk I., Zdanavičius J.   +2 more
doaj   +1 more source

Extent of alteration, paleomagnetic history, and infrared spectral properties of the Tarda ungrouped carbonaceous chondrite

Meteoritics &Planetary Science, Volume 59, Issue 9, Page 2411-2431, September 2024.
Abstract Tarda is an ungrouped, hydrated carbonaceous chondrite (C2‐ung) that was seen to fall in Morocco in 2020. Early studies showed that Tarda chemically resembles another ungrouped chondrite, Tagish Lake (C2‐ung), which has previously been linked to the dark D‐type asteroids.
H. C. Bates, R. Aspin, C. Y. Fu, C. S. Harrison, E. Feaver, E. Branagan‐Harris, A. J. King, J. F. J. Bryson, S. Sridhar, C. I. O. Nichols   +9 more
wiley   +1 more source

Asteroid (101955) Bennu in the laboratory: Properties of the sample collected by OSIRIS‐REx

Meteoritics &Planetary Science, Volume 59, Issue 9, Page 2453-2486, September 2024.
Abstract On September 24, 2023, NASA's OSIRIS‐REx mission dropped a capsule to Earth containing ~120 g of pristine carbonaceous regolith from Bennu. We describe the delivery and initial allocation of this asteroid sample and introduce its bulk physical, chemical, and mineralogical properties from early analyses.
Dante S. Lauretta, Harold C. Connolly Jr, Joseph E. Aebersold, Conel M. O'D. Alexander, Ronald‐L. Ballouz, Jessica J. Barnes, Helena C. Bates, Carina A. Bennett, Laurinne Blanche, Erika H. Blumenfeld, Simon J. Clemett, George D. Cody, Daniella N. DellaGiustina, Jason P. Dworkin, Scott A. Eckley, Dionysis I. Foustoukos, Ian A. Franchi, Daniel P. Glavin, Richard C. Greenwood, Pierre Haenecour, Victoria E. Hamilton, Dolores H. Hill, Takahiro Hiroi, Kana Ishimaru, Fred Jourdan, Hannah H. Kaplan, Lindsay P. Keller, Ashley J. King, Piers Koefoed, Melissa K. Kontogiannis, Loan Le, Robert J. Macke, Timothy J. McCoy, Ralph E. Milliken, Jens Najorka, Ann N. Nguyen, Maurizio Pajola, Anjani T. Polit, Kevin Righter, Heather L. Roper, Sara S. Russell, Andrew J. Ryan, Scott A. Sandford, Paul F. Schofield, Cody D. Schultz, Laura B. Seifert, Shogo Tachibana, Kathie L. Thomas‐Keprta, Michelle S. Thompson, Valerie Tu, Filippo Tusberti, Kun Wang, Thomas J. Zega, C. W. V. Wolner, the OSIRIS‐REx Sample Analysis Team   +54 more
wiley   +1 more source