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Number of asteroids in the main belt as a function of their semimajor axis (a). The dashed lines indicate Kirkwood gaps, while colors designate the following zones: I: inner main-belt (a < 2.5 AU) II: middle main-belt (2.5 AU < a < 2.82 AU) III: outer main-belt (a > 2.82 AU)
NASA estimates that between 1.1 and 1.9 million asteroids in the asteroid belt are larger than 1 kilometer in diameter. Millions are smaller. Approximately 8% of known main belt asteroids are similar in composition to 16 Psyche.
5 de may. de 2017 · By Nola Taylor Tillman. Contributions from. Paul Sutter. published 5 May 2017. The main asteroid belt, between Mars and Jupiter, is where most asteroids orbit. The main asteroid belt,...
These bodies were originally designated main-belt comets (MBCs) in 2006 by astronomers David Jewitt and Henry Hsieh, but this name implies they are necessarily icy in composition like a comet and that they only exist within the main-belt, whereas the growing population of active asteroids shows that this is not always the case.
The asteroid belt or main belt is a ring of small and large rocks and dust between the orbits of Mars and Jupiter. The biggest object in the asteroid belt is Ceres, a dwarf planet. The Kirkwood gaps separate the asteroid belt into several groups.
We discuss the current state of research on the size–frequency distribution, the ages of asteroids, and the implications on the formation of asteroids. We review planetesimal formation theory, specifically focusing on the initial sizes of primordial planetesimals.
This plot shows the location of the main belt with respect to the planets and the Sun as well as the orbital structure of asteroid inclinations and number…
