SpaceRef

SpaceRef


Interrelation Between the Physical Properties and the Orbital Evolution of the Near-Earth Asteroids: A New Numerical Approach

Status Report From: arXiv.org e-Print archive
Posted: Thursday, August 21, 2003

Astrophysics, abstract
astro-ph/0308110

From: Mihailo Cubrovic <cygnus@eunet.yu>
Date: Thu, 7 Aug 2003 00:38:03 GMT   (184kb)
Interrelation Between the Physical Properties and the Orbital Evolution of the Near-Earth Asteroids: A New Numerical Approach

Authors: Mihailo Cubrovic
Comments: 11 pages Preliminary version
Report-no: Petnica Papers 2002

Possible connections between the physical properties of Near-Earth Asteroids and their orbital evolution was explored, with emphasis on binary asteroids. The main hypothesis, suggested from the observations, is that the Near-Earth population contains considerably higher percent of binaries compared to the Main Belt. Typical evolution paths for different types (in sense of physical properties) of binary Near-Earth Asteroids were also explored, as well as the distribution of these types among different areas in the space of orbital elements. The simulation covered simultaneously both orbital evolution and evolution of physical properties, which is the main improvement in comparison to the previous researches of this kind. Orbital integration was performed with a second-order symplectic integrator based on the classical concept of mixed variables (MVS) and optimized for close approaches. Physical evolution due to tidal forces and collision/disruption events were described with TREESPH hydrocode, which combines N-body integration and Smoothed Particle Hydrodynamics equations. The results show typical evolution paths of some Near-Earth Asteroids: contact binaries, separated binaries, asteroids with a satellite, fast rotators. Slow rotators (like 4179 Toutatis) have not been detected. Possible explanation s lie in specific (possibly cometary) cosmogonic origin of these objects and strong non-gravitational influences but other explanations also cannot be written off. Of course, larger ensemble and longer interval of integration would make the results of this simulation more certain.
Full-text: PDF only

References and citations for this submission:
SLAC-SPIRES HEP (refers to , cited by, arXiv reformatted)


Links to: arXiv, astro-ph, /find, /abs (-/+), /0308, ?

// end //

More status reports and news releases or top stories.

Please follow SpaceRef on Twitter and Like us on Facebook.

NanoRacks