arXiv subjects

Anatoliy Ivantsov

Publications and source records attributed to Anatoliy Ivantsov.

3 recordsLinked to original sources

arXiv2014

Close encounters of Near Earth Objects with large asteroids

Close encounters of Near Earth Objects (NEOs) with large asteroids are a possible source of systematic errors in trajectory propagations and asteroid mitigation. It is, thus, necessary to identify those large asteroids that have to be considered as perturbers in NEO orbit modeling. Using the Standard Dynamical Model we searched for encounters between the 1649 numbered Near Earth Asteroids (NEAs) and 2191 large asteroids having sizes greater than 20 km. In- vestigating the 21st century A.D. we have found 791 close encounters with 195 different large asteroids that lead to a substantial scattering of NEOs.

astro-ph.EP↗

arXiv2013

On future opportunities to observe gravitational scattering of main belt asteroids into NEO source regions

Orbital resonances are believed to be responsible for the delivery of main belt asteroids to the inner Solar System. Several possibilities have been suggested to transport asteroids and their fragments into mean motion and secular resonances including non-gravitational forces and gravitational scattering. We investigate future resonance crossings of known asteroids that occur in the main belt over the next century. Our goal is to identify potentially observable injections of asteroids into source regions for Near Earth Objects (NEOs) as well as to determine the role of close encounters among main belt asteroids in this process.

astro-ph.EP↗

arXiv2013

High Precision Astrometry in Asteroid Mitigation - the NEOShield Perspective

Among the currently known Near Earth Objects (NEOs), roughly 1400 are classified as being potentially hazardous asteroids. The recent Chelyabinsk event has shown that these objects can pose a real threat to mankind. We illustrate that high precision asteroid astrometry plays a vital role in determining potential impact risks, selecting targets for deflection demonstration missions and evaluating mitigation mission success. After a brief introduction to the NEOShield project, an international effort initiated by the European Commission to investigate aspects of NEO mitigation in a comprehensive fashion, we discuss current astrometric performances, requirements and possible issues with NEO risk assessment and deflection demonstration missions.

astro-ph.IM↗