Estimated Abundance of Atens and Asteroids Evolving on Orbits

PDF	The Population of Mars-Crossers: Classification and Dynamical Estimated abundances of Atens and asteroids evolving on orbits between Earth and Sun Icarus 143 421–424 Migliorini F P Michel A Morbidelli D

What is the orbital period of asteroids?
Many asteroids orbit the Sun in a region between Mars and Jupiter.
This "belt" of asteroids follows a slightly elliptical path as it orbits the Sun in the same direction as the planets.
It takes anywhere from three to six Earth years for a complete revolution around the Sun.
What is the orbital velocity of an asteroid?
A large portion of known asteroids are in orbit in a region between Mars and Jupiter, called the Asteroid Belt.
Due to their distance from the sun, their average orbital velocities range between 17 and 25 km/s (38,029 to 55,925 mph).
Earth-crossing asteroid, asteroid whose path around the Sun crosses Earth's orbit.
Two groups of such asteroids—Aten and Apollo asteroids—are distinguished by the size of their orbits and how closely they approach the Sun.
The Atens and Apollos cross Earth's orbit on an almost continuous basis.

Do asteroids have an orbit?

As they revolve around the Sun in elliptical orbits, the asteroids also rotate, sometimes quite erratically, tumbling as they go.
More than 150 asteroids are known to have a small companion moon (some have two moons).

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Estimated Abundance of Atens and Asteroids Evolving on Orbits

In order to analyze the evolutions of Apollos and Atens and the change of their observed ratio as a result of their evolutions, we have then used the orbital evolutions of a sample of 81 Apollos and 12 Atens computed over 60 Myr by Gladman et al

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The orbital distribution of Near-Earth Objects inside - Squarespace

the unexpected production of retrograde orbits from main-belt asteroid sources; this orbital distribution (including Atens and Atiras) will also allow tight- (1997 ) found '30 of the particles evolving out of the Kuiper belt Table 2 shows that the best estimates for the NEO class frac- NOTE: Estimated abundance of

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Orbital and Dynamical Characteristics of Small Bodies in the Region

of asteroids will be discussed as well, in particular those that may evolve from Aten asteroids are those with an orbital semi-major axis a < 1 AU and Michel, P , Zappalŕ, V , Cellino, A , Tanga, P : NOTE: Estimated Abundance of Atens and

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Asteroid orbital inversion using statistical methods - CORE

15 jui 2005 · Asteroid orbit computation can be taken to comprise of two problems, the orbital giving a single orbit solution and possibly some error estimates can be cure their orbits with an abundance of observations The Atens have also the asteroid collision probability evolves when the observational arc and

PDF	Unveiling Objects Interior to Earths Orbit - DLR 16 oct 2008 · Patrick Michel, Vincenzo Zappalà, Alberto Cellino, Paolo Tanga; Estimated Abundance of Atens and Asteroids Evolving on Orbits between