NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos

December 2015 • 2015ApJ...814..117N

Authors • Nugent, C. R. • Mainzer, A. • Masiero, J. • Bauer, J. • Cutri, R. M. • Grav, T. • Kramer, E. • Sonnett, S. • Stevenson, R. • Wright, E. L.

Abstract • We present preliminary diameters and albedos for 7956 asteroids detected in the first year of the NEOWISE Reactivation mission. Of those, 201 are near-Earth asteroids and 7755 are Main Belt or Mars-crossing asteroids. 17% of these objects have not been previously characterized using the Near-Earth Object Wide-field Infrared Survey Explorer, or “NEOWISE” thermal measurements. Diameters are determined to an accuracy of ∼20% or better. If good-quality H magnitudes are available, albedos can be determined to within ∼40% or better.


IPAC Authors

Roc Cutri

IPAC Deputy Director


Joe Masiero

Associate Scientist