Erdnahe Objekte (englisch Near-Earth object, NEO) sind Asteroiden, Kometen und große Meteoroiden, deren größte Annäherung an die Sonne (Periheliondistanz) weniger als 1,3 Astronomische Einheiten (AE) beträgt.Die Umlaufbahn erdnaher Objekte bringt diese somit in die Nähe der Erde. Um dieser Gefahr begegnen zu können, sind genaue Kenntnisse über solche …

Sentry is a highly automated impact prediction system operated by the JPL Center for NEO Studies (CNEOS) since 2002. It continually monitors the most up-to-date asteroid catalog for possibilities of future impact with Earth over the next 100+ years. Whenever a potential impact is detected it will be analyzed and the results immediately published by the Center for Near-Earth …

An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground blocks from view (occults) an object in the background.In this general sense, occultation applies to the visual scene observed from low …