Asteroid and Comet Trajectory Propagator (NEOPROP) In 2012, Astos Solutions developed for ESA a new orbital propagator algorithm in order to assess the potential risk of impact of an NEO. The...

Directly the PDO manager Richard Moissl Head of the Planetary Defence Office Space Safety Programme ESA/ESRIN, Frascati, Italy richard.moissl[@]esa.int  

NEO Information Centres NEODyS - The Near-Earth Object Dynamic Site https://newton.spacedys.com/neodys/ AstDyS - The Asteroids Dynamic Site https://newton.spacedys.com/astdys/ The Minor Planet...

Albedo The ratio of reflected sunlight to incident sunlight. Given an albedo and the distance of the asteroid from the Sun and the observer, the size of an object can be estimated from its...