Asteroid Diameters and Albedos from NEOWISE Reactivation Mission Years Six and Seven
Joseph R. Masiero, A.K. Mainzer, J.M. Bauer, R.M. Cutri, T. Grav, E., Kramer, J. Pittichov\'a, E.L. Wright

TL;DR
This paper reports diameters and albedos for over 1800 asteroids observed by NEOWISE during its sixth and seventh years, highlighting the uncertainties and orbital characteristics of these objects.
Contribution
It provides new thermal measurements and analysis of asteroid orbits from NEOWISE Reactivation data, expanding the asteroid database and insights into their orbital distributions.
Findings
Approximately 30% uncertainty in NEO diameter estimates compared to cryogenic data.
NEOWISE discovered NEOs on orbits with perihelia far from the ecliptic.
Total of 1845 unique NEOs characterized by NEOWISE to date.
Abstract
We present diameters and albedos computed for the near-Earth and Main Belt asteroids observed by the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) spacecraft during the sixth and seventh years of its Reactivation mission. These diameters and albedos are calculated from fitting thermal models to NEOWISE observations of NEOs and MBAs detected during the sixth year of the survey, and NEOs and MBAs from the seventh year. Comparisons of the near-Earth object diameters derived from Reactivation data with those derived from the WISE cryogenic mission data show a relative uncertainty. This larger uncertainty compared to data from the cryogenic mission is due to the need to assume a beaming parameter for the fits to the shorter wavelength data that the Reactivation mission is limited to. We also present an analysis of the orbital parameters…
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Taxonomy
TopicsAstro and Planetary Science · Planetary Science and Exploration · Spacecraft and Cryogenic Technologies
