Results 21 to 30 of about 164,857 (187)
Active Asteroid 311P/PanSTARRS: Rotational Instability as the Origin of its Multitails?
The Astronomical Journal, 2023 The active asteroid 311P/PanSTARRS is one of the two targets of the planned Chinese asteroid exploration mission Tianwen-2. During 2013, 311P experienced several mass-loss events and exhibited multiple comet-like tails. Here we analyze the morphology and
Bin Liu +5 more
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Thermophysical Investigation of Asteroid Surfaces. II. Factors Influencing Grain Size
The Planetary Science Journal, 2022 Asteroid surfaces are subjected to mechanical weathering processes that result in the development and evolution of regolith. Two proposed mechanisms—impact bombardment and thermal fatigue—have been proposed as viable and dominant weathering processes ...
Eric M. MacLennan, Joshua P. Emery
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NEOMOD: A New Orbital Distribution Model for Near-Earth Objects
The Astronomical Journal, 2023 Near-Earth Objects (NEOs) are a transient population of small bodies with orbits near or in the terrestrial planet region. They represent a mid-stage in the dynamical cycle of asteroids and comets, which starts with their removal from the respective ...
David Nesvorný +13 more
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Observational Data and Orbits of the Asteroids Discovered at the Molėtai Observatory in 2008–2009
Open Astronomy, 2016 We present the statistics of the asteroids observed and discovered at the Molėtai Observatory, Lithuania, in 2008–2009 within the project for astrometric observations of the near-Earth objects (NEOs), the main belt asteroids and comets.
Černis K. +2 more
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Eccentricity distribution in the main asteroid belt [PDF]
, 2016 The observationally complete sample of the main belt asteroids now spans more than two orders of magnitude in size and numbers more than 64,000 (excluding collisional family members). We undertook an analysis of asteroids' eccentricities and their interpretation with simple physical models.
arxiv +1 more source
A record of planet migration in the Main Asteroid Belt [PDF]
Nature 457:1109-1111,2009, 2009 The main asteroid belt lies between the orbits of Mars and Jupiter, but the region is not uniformly filled with asteroids. There are gaps, known as the Kirkwood gaps, in the asteroid distribution in distinct locations that are associated with orbital resonances with the giant planets; asteroids placed in these locations follow chaotic orbits and escape
arxiv +1 more source
Photometric observations of six asteroids carried out in Simeiz in 2002
Вісник Астрономічної школи, 2004 The photometric observations of six asteroids observed in Simeiz Observatory in 2002 are presented. The lightcurves of four near-Earth asteroids (1036 Ganymed, 6455 1992 HE, 31669 1999 JT6, 2002 HU11) and two main-belt asteroids (6317 Dreyfus and 22338 ...
N. M. Gaftonyuk, Yu. N. Kruglyy
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Main Belt Asteroid Shape Distribution from Gaia DR2 [PDF]
, 2018 Gaia Data Release 2 includes observational data for 14,099 pre-selected asteroids. From the sparsely sampled G band photometry, we derive lower-limit lightcurve amplitudes for 11,665 main belt asteroids in order to provide constraints on the distribution of shapes in the asteroid main belt.
arxiv +1 more source
Light curve analysis of main belt asteroids 4747, 5255, 11411, 15433, 17866
Open Astronomy, 2023 The main belt asteroids 4747, 5255, 11411, 15433, and 17866 were studied at the Baldone Astrophysical Observatory in the time span range 2018–2022. The obtained light curve data together with published Minor Planet Center data are analyzed with Fourier ...
Eglitis Ilgmars, Kristers Nagainis
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An ancient and a primordial collisional family as the main sources of X-type asteroids of the inner Main Belt [PDF]
A&A 624, A69 (2019), 2019 The near-Earth asteroid population suggests the existence of an inner Main Belt source of asteroids that belongs to the spectroscopic X-complex and has moderate albedos. The identification of such a source has been lacking so far. We argue that the most probable source is one or more collisional asteroid families that escaped discovery up to now.
arxiv +1 more source