Debiased Orbital and Absolute Magnitude Distribution of the Near-Earth Objects
- W. Bottke, A. Morbidelli, T. Metcalfe
- Physics, Geology
- 1 April 2002
The orbital and absolute magnitude distribution of the near-Earth objects (NEOs) is difficult to compute, partly because only a modest fraction of the entire NEO population has been discovered so…
Dynamical Lifetimes of Objects Injected into Asteroid Belt Resonances
- B. Gladman, F. Migliorini, M. Duncan
- Physics, Geology
- 11 July 1997
Numerical simulations of particles placed in orbital resonances in the main asteroid belt show that the typical dynamical lifetimes of objects that could become near-Earth asteroids or meteorites are…
Rotational breakup as the origin of small binary asteroids
- K. Walsh, D. Richardson, P. Michel
- Physics, GeologyNature
- 10 July 2008
It is found that mass shed from the equator of a critically spinning body accretes into a satellite if the material is collisionally dissipative and the primary maintains a low equatorial elongation.
On the Size Distribution of Asteroid Families: The Role of Geometry
- P. Tanga, A. Cellino, P. Michel, V. Zappalà, P. Paolicchi, A. Dell’Oro
- Physics, Geology
- 1 September 1999
Abstract The steep slopes of the size distributions of the presently known asteroid families have long represented a debated problem. The reason is that it is not easy to reproduce them by the usual…
Thermal fatigue as the origin of regolith on small asteroids
- M. Delbo’, G. Libourel, S. Marchi
- Physics, GeologyNature
- 2 April 2014
It is reported that thermal fatigue, a mechanism of rock weathering and fragmentation with no subsequent ejection, is the dominant process governing regolith generation on small asteroids and that thermal fragmentation induced by the diurnal temperature variations breaks up rocks larger than a few centimetres more quickly than do micrometeoroid impacts.
Super-catastrophic disruption of asteroids at small perihelion distances
- M. Granvik, A. Morbidelli, P. Michel
- Physics, GeologyNature
- 18 February 2016
It is found that low-albedo asteroids are more likely to be destroyed farther from the Sun, which explains the apparent excess of high- albedo near-Earth objects and suggests thatLow-al Bedrock asteroids break up more easily as a result of thermal effects.
Fragment properties at the catastrophic disruption threshold: The effect of the parent body’s internal structure
- M. Jutzi, P. Michel, W. Benz, D. Richardson
- Physics
- 1 September 2009
Origin and Evolution of Near-Earth Objects
- A. Morbidelli, W. Bottke, C. Froeschlé, P. Michel
- Physics, Geology
- 1 March 2002
Asteroids and comets on orbits with perihelion distance q 0.983 AU are usually called near-Earth objects (NEOs). It has long been debated whether the NEOs are mostly of asteroidal or cometary origin.…
From Magnitudes to Diameters: The Albedo Distribution of Near Earth Objects and the Earth Collision Hazard
- A. Morbidelli, R. Jedicke, W. Bottke, P. Michel, E. Tedesco
- Physics, Geology
- 1 August 2002
Abstract A recently published model of the Near Earth Object (NEO) orbital–magnitude distribution (Bottke et al. , 2002, Icarus 156 , 399–433.) relies on five intermediate sources for the NEO…
Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis
- D. DellaGiustina, J. Emery, the OSIRIS-REx Team
- Physics, GeologyNature Astronomy
- 19 March 2019
Establishing the abundance and physical properties of regolith and boulders on asteroids is crucial for understanding the formation and degradation mechanisms at work on their surfaces. Using images…
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