Category dead comets

How many Dead Comets are there?

One long-standing question is: how many asteroids – especially near-Earth asteroids (NEAs) – were comets in the past? In the classical conception, comets have surface ices and form tails and comae in the vicinity of the Sun; asteroids are simply rocks in space. In the recent years, the two classifications became less clear than that. […]

Detection of Cometary Activity in NEO Don Quixote

Part of the NEO population is considered to consist of so-called dead comets. Dead comets are comets that have spent a long time as NEOs and have been depleted their volatile inventories in numerous, close encounters with the Sun, i.e., they are extinct comets. They can be identified through their distinctive comet-like orbits and their […]