The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) and 
IPAC at Caltech announce the NEOWISE 2021 Data Release.

The 2021 Release includes all data acquired during the seventh year of 
the NEOWISE Reactivation mission (Mainzer et al. 2014, ApJ, 792, 30), 
December 13, 2019, to December 13, 2020. These data are combined with 
those from Years 1-6 NEOWISE into a single archive that contains 
approximately 17.8 million sets of 3.4 and 4.6 micron images and a 
database of ~133 billion source detections. 

NEOWISE scanned the sky fourteen (14) complete times during the first seven 
survey years, with approximately six months between survey passes. 
With twelve or more independent 3.4 and 4.6 micron exposures made on 
each sky position during each epoch, the NEOWISE archive is a 
time-domain resource for extracting multiple, independent thermal flux 
and position measurements of Solar System small bodies, as well as 
background galactic and extragalactic sources.

A guide to the NEOWISE data release, data access instructions and 
supporting documentation is available at: 

http://wise2.ipac.caltech.edu/docs/release/neowise/

NEOWISE is a joint project of the Jet Propulsion Laboratory/
California Institute of Technology and the University of Arizona, 
funded by the National Aeronautics and Space Administration Planetary 
Science Division.