Results 221 to 230 of about 15,631 (239)

Polarimetry of main belt asteroids: Wavelength dependence

Icarus, 2009
New UBVRI polarimetric observations of ten asteroids, including space mission targets 1 Ceres and 21 Lutetia, are presented. These observations were obtained with the 1.25-m telescope of the Crimean Astrophysical Observatory and have been used to study the wavelength dependence of polarization for a sample of asteroids belonging to the M and low albedo
Belskaya, Irina N., Levasseur-Regourd, Anny Chantal, Cellino, Alberto, Efimov, Yuruy S., Shakhovskoy, Nikolay M., Hadamcik, Edith, Bendjoya, Philippe   +6 more
openaire   +4 more sources

Discovery of a Basaltic Asteroid in the Outer Main Belt

Science, 2000
Visible and near-infrared spectroscopic observations of the asteroid 1459 Magnya indicate that it has a basaltic surface. Magnya is at 3.15 astronomical units (AU) from the sun and has no known dynamical link to any family, to any nearby large asteroid, or to asteroid 4 Vesta at 2.36 AU, which is the only other known large basaltic asteroid.
Jorge Márcio Carvano, Schelte J. Bus, M. Florczak, Thais Mothé-Diniz, Tatiana A. Michtchenko, Richard P. Binzel, Thomas H. Burbine, Daniela Lazzaro, C. A. Angeli, Alan W. Harris   +9 more
openaire   +3 more sources

The number density of main‐belt asteroids

Astronomische Nachrichten, 1997
AbstractIn this paper we have studied how the number density of asteroids varies as a function of the mean distance from the sun.
C.‐I. Lagerkvist, J. S. V. Lagerros
openaire   +2 more sources

Asteroid Proper Elements and the Dynamical Structure of the Asteroid Main Belt

Icarus, 1994
Abstract We have computed proper elements for 12,573 asteroids, including all the ones with orbits accurate enough to be useful for family identification. This was done with an upgraded version of our iterative analytical algorithm, resulting in significantly improved accuracy for most asteroids in the low to moderate inclination and eccentricity ...
MILANI COMPARETTI, ANDREA, KNEZEVIC, ZORAN   +1 more
openaire   +3 more sources

The recent breakup of an asteroid in the main-belt region

Nature, 2002
The present population of asteroids in the main belt is largely the result of many past collisions. Ideally, the asteroid fragments resulting from each impact event could help us understand the large-scale collisions that shaped the planets during early epochs.
Harold F. Levison, William F. Bottke, David Nesvorný, Luke Dones   +3 more
openaire   +3 more sources

Subaru Main Belt Asteroid Survey (SMBAS)—Size and color distributions of small main-belt asteroids

Planetary and Space Science, 2007
Abstract Since February, 2001, we have been conducting a series of survey observations to investigate the physical property of very small Main Belt Asteroids (sub-km MBAs) using the Subaru prime-focus camera (Suprime-Cam) attached to the 8.2 m Subaru telescope. We call our surveys “SMBAS: Subaru Main-Belt Asteroids Survey”.
T. Nakamura, Fumi Yoshida
openaire   +2 more sources

The fossilized size distribution of the main asteroid belt

Icarus, 2005
Planet formation models suggest the primordial main belt experienced a short but intense period of collisional evolution shortly after the formation of planetary embryos. This period is believed to have lasted until Jupiter reached its full size, when dynamical processes (e.g., sweeping resonances, excitation via planetary embryos) ejected most ...
Bottke, W.F., Durda, D.D., Nesvorný, D., Jedicke, R., Morbidelli, A., Vokrouhlický, D., Levison, H.   +6 more
openaire   +3 more sources

Rogue Asteroids in the Inner Main Asteroid Belt

2014
Very red featureless asteroids (spectroscopic D-types) are common among Jupiter Trojans, Hildas, and the outer main belt, and are thought to have formed in the outer solar system. Dynamical models of planetary migration and orbital drift by the Yarkovsky effect predict these D-types could have been transported as close to the sun as the middle main ...
Demeo, Francesca E., Binzel, Richard P., Carry, Benoît, Moskovitz, Nicholas A., Polishook, David   +4 more
openaire   +1 more source

Olivine-rich asteroids in the main asteroid belt

2015
Olivine-dominated asteroids, classified as A-types with near-infrared spectral measurements are largely thought to be the mantle remnants of disrupted differentiated small bodies. These A-type asteroids hold clues to asteroid differentiation and to the collisional history of those differentiated bodies.
Demeo, Francesca E., Polishook, David, Carry, Benoît, Moskovitz, Nicholas A., Burt, Brian, Binzel, Rick   +5 more
openaire   +1 more source

Are Main-Belt Asteroids a Sufficient Source for the Earth-Approaching Asteroids?

Icarus, 1997
This paper predicts the size distribution of the Earth-approaching asteroids with diameterd= 10 m to 10 km, assuming they originate as the fragments of main-belt asteroids with a cumulative size distribution proportional tod−2.5and that they have self-similar fragmentation properties.
openaire   +2 more sources