Based on Spitzer Space Telescope observations, we derived diameter and albedo estimates for 2132 asteroids in near-Earth space - the largest dataset of its kind. Our results and data are available online.

Dead comets are small bodies that appear as inactive asteroids, but have a cometary origin. Some of these objects might still harbor ices and can still activate and appear comet-like. Since these objects might signifcantly contribute to the volatile reservoir of the asteroid population, it is important to understand how many of these objects there are.

With rapid-response observations using UKIRT, we are able to observe newly discovered near-Earth asteroids when they are still close to Earth and thus bright. Our observations enable a probabilistic taxonomic classification of asteroids with typically small sizes and the determination of their compositional distribution.

We observed two very small asteroids with the Spitzer Space Telescope to actually measure their physical properties for the first time. The constraints that we were able to place on their properties do not agree with the standard picture of small asteroids.