NEOWISE REACTIVATION MISSION YEAR TWO: ASTEROID DIAMETERS and ALBEDOS

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

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The Near-Earth Object Wide-Field Infrared Survey Explorer (NEOWISE) mission continues to detect, track, and characterize minor planets. We present diameters and albedos calculated from observations taken during the second year since the spacecraft was reactivated in late 2013. These include 207 near-Earth asteroids (NEAs) and 8885 other asteroids. Of the NEAs, 84% NEAs did not have previously measured diameters and albedos by the NEOWISE mission. Comparison of sizes and albedos calculated from NEOWISE measurements with those measured by occultations, spacecraft, and radar-derived shapes shows accuracy consistent with previous NEOWISE publications. Diameters and albedos fall within ± ∼20% and ± ∼40%, 1-sigma, respectively, of those measured by these alternate techniques. NEOWISE continues to preferentially discover near-Earth objects which are large (>100 m), and have low albedos.

Original languageEnglish (US)
Article number63
JournalAstronomical Journal
Volume152
Issue number3
DOIs
StatePublished - Sep 2016
Externally publishedYes

Keywords

  • minor planets, asteroids: general
  • surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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