Results 1 to 10 of about 117,252 (332)

Machine learning techniques for classifying dangerous asteroids [PDF]

MethodsX, 2023
There is an infinite number of objects in outer space, and these objects and asteroids might be harmful. Hence, it is wise to know what is surrounding us and what can harm us amongst those.Therefore, in this article, with the hyperparameters tuning of ...
Seyed Matin Malakouti, Mohammad Bagher Menhaj, Amir Abolfazl Suratgar   +2 more
doaj   +2 more sources

Identification and Dynamical Properties of Asteroid Families [PDF]

, 2015
Asteroids formed in a dynamically quiescent disk but their orbits became gravitationally stirred enough by Jupiter to lead to high-speed collisions. As a result, many dozen large asteroids have been disrupted by impacts over the age of the Solar System, producing groups of fragments known as asteroid families.
Broz, M., Carruba, V., Nesvorny, D.
arxiv   +3 more sources

AVAST Survey 0.4-1.0 μm Spectroscopy of Igneous Asteroids in the Inner and Middle Main Belt [PDF]

, 2012
We present the spectra of 60 asteroids, including 47 V-types observed during the first phase of the Adler V-Type Asteroid (AVAST) Survey. SDSS photometry was used to select candidate V-type asteroids for follow up by nature of their very blue $i-z$ color.
Abazajian, Andrew Puckett, Assandri, Binzel, Bottke, Burbine, Bus, Bus, Carruba, Carvano, Colina, de Sanctis, DeMeo, Duffard, Dumas, Gaffey, Geza Gyuk, Hardersen, Hardorp, Hiroi, Ivezić, Ivezić, Jurić, Landolt, Lazzaro, Lazzaro, Li, Mark Hammergren, Mayne, McCord, Michael R. Solontoi, Moskovitz, Moskovitz, Moskovitz, Mothé-Diniz, Nesvorný, Parker, Reddy, Roig, Roig, Russell, Scott, Scott, Stoughton, Sunshine, Thomas, Vokrouhlický, Xu, York   +48 more
arxiv   +3 more sources

Astronomical Observations of Volatiles on Asteroids [PDF]

, 2015
We have long known that water and hydroxyl are important components in meteorites and asteroids. However, in the time since the publication of Asteroids III, evolution of astronomical instrumentation, laboratory capabilities, and theoretical models have ...
Campins, Humberto, Emery, Joshua P., Howell, Ellen S., Licandro, Javier, Rivkin, Andrew S., Takir, Driss, Vilas, Faith   +6 more
core   +2 more sources

Compositional Diversity Among Primitive Asteroids [PDF]

, 2018
Spectroscopic observations from the ultraviolet to the mid-infrared have revealed new and diagnostic differences among primitive asteroids. We review the spectral characteristics of these asteroids and their inferred compositional and physical properties.
A'Hearn, Abell, Alí-Lagoa, Alí-Lagoa, Barucci, Barucci, Binzel, Bottke, Bottke, Bottke, Bottke, Bradley, Brunetto, Brunetto, Bunch, Campins, Campins, Campins, Campins, Carvano, Clark, Cloutis, Cloutis, Cloutis, Cloutis, Cohen, de Leuw, de León, de León, de León, Delbo, Dermott, Dotto, Dotto, Draine, Dykhuis, Emery, Feierberg, Feierberg, Ferriere, Fornasier, Fornasier, Gaffey, Gaffey, Gounelle, Hanner, Harker, Hendrix, Hendrix, Hendrix, Henning, Hiroi, Hiroi, Jenniskens, Johnson, Kanuchova, Kelley, Landsman, Landsman, Landsman, Lantz, Lantz, Lantz, Lauretta, Lazzarin, Lebofsky, Licandro, Licandro, Lim, Lisse, Marchi, Marchis, Mazanek, McAdam, McSween, McSween, Morate, Morate, Morlok, Müller, Nesvorný, Nesvorný, Nuth, Olofsson, Oszkiewicz, Papoular, Papoular, Pieters, Pinilla-Alonso, Pinilla-Alonso, Reddy, Rivkin, Rivkin, Rivkin, Rivkin, Rivkin, Rivkin, Roettger, Schnaiter, Stecher, Takahashi, Takir, Takir, Tholen, Tomeoka, Tomeoka, Tsuda, Velbel, Vernazza, Vernazza, Vilas, Vilas, Vilas, Vilas, Vilas, Walsh, Waszczak, Ziffer   +117 more
arxiv   +3 more sources

Numerical simulations suggest asteroids (101955) Bennu and (162173) Ryugu are likely second or later generation rubble piles [PDF]

Nature Communications
Rubble pile asteroids are widely understood to be composed of reaccumulated debris following a catastrophic collision between asteroids in the main asteroid belt, where each disruption can make a family of new asteroids.
K. J. Walsh, R-L. Ballouz, W. F. Bottke, C. Avdellidou, H. C. Connolly Jr, M. Delbo, D. N. DellaGiustina, E. R. Jawin, T. McCoy, P. Michel, T. Morota, M. C. Nolan, S. R. Schwartz, S. Sugita, D. S. Lauretta   +14 more
doaj   +2 more sources

Mineralogy and Surface Composition of Asteroids [PDF]

, 2015
Methods to constrain the surface mineralogy of asteroids have seen considerable development during the last decade with advancement in laboratory spectral calibrations and validation of our interpretive methodologies by spacecraft rendezvous missions ...
Burbine, Thomas H., Dunn, Tasha L., Moskovitz, Nicholas A., Reddy, Vishnu, Thomas, Cristina A.   +4 more
core   +2 more sources

Asteroid Distributions in the Ecliptic [PDF]

, 2009
We present analysis of the asteroid surface density distribution of main belt asteroids (mean perihelion $\Delta \simeq 2.404$ AU) in five ecliptic latitude fields, $-17 \gtsimeq \beta(\degr) \ltsimeq +15$, derived from deep \textit{Large Binocular Telescope} (LBT) $V-$band (85% completeness limit $V = 21.3$ mag) and \textit{Spitzer Space Telescope ...
Abazajian, Andrea Dipaolo, Bowell, Charles E. Woodward, Delbo, Delbo, Emanuele Giallongo, Erin Lee Ryan, Fazio, Fernando Pedichini, Fernández, Fowler, Hill, Ivezić, Jacopo Farinato, John Hill, Joye, Lacy, Lamy, Levison, Lonsdale, Meadows, Ragazzoni, Richard Pogge, Rieke, Roberto Ragazzoni, Roland Gredel, Ryan, Spitzer Science Center, Stapelfeldt, Tedesco, Tedesco, Tedesco, Tedesco, Trilling, Veeder, Wetherill, Zacharias   +37 more
arxiv   +3 more sources

Collisional model of asteroids and their debris [PDF]

, 1969
A model for colliding objects in the asteroidal belt is formulated. An integro-differential equation describing the evolution of a system of particles undergoing inelastic collisions and fragmentation is derived and solved for steady-state conditions. It
J. S. Dohnanyi
openalex   +2 more sources

Ammonium salts are a reservoir of nitrogen on a cometary nucleus and possibly on some asteroids [PDF]

Science, 2020
Ammonium salts on comet 67P The distribution of carbon and nitrogen in the Solar System is thought to reflect the stability of carbon- and nitrogen-bearing molecules when exposed to the heat of the forming Sun. Comets have a low nitrogen-to-carbon ratio,
O. Poch, I. Istiqomah, E. Quirico, P. Beck, B. Schmitt, P. Theulé, A. Faure, P. Hily-Blant, L. Bonal, A. Raponi, M. Ciarniello, B. Rousseau, S. Potin, O. Brissaud, L. Flandinet, G. Filacchione, A. Pommerol, N. Thomas, D. Kappel, V. Mennella, L. Moroz, V. Vinogradoff, G. Arnold, S. Erard, D. Bockelée-Morvan, C. Leyrat, F. Capaccioni, M. D. De Sanctis, A. Longobardo, F. Mancarella, E. Palomba, F. Tosi   +31 more
semanticscholar   +1 more source