|Nation||United States of America (USA)|
|Spacecraft Mass||1,457 pounds (661 kilograms)|
|Mission Design and Management||NASA / JPL|
|Launch Vehicle||Delta 2|
|Launch Date and Time||Dec. 14, 2009 | 14:09 UT|
|Launch Site||Vandenberg Air Force Base, Calif. (USA)|
|Scientific Instruments||Cryogenic Telescope with Four Megapixel Infrared Cameras|
Dec. 14, 2009: Launch
Jan. 2010 to Feb. 2011: Primary mission
February 2011: Spacecraft placed in hibernation
Sept. 2013-Present: NEOWISE operations ongoing
In Depth: WISE/NEOWISE
NASA's WISE (Wide-field Infrared Survey Explorer) spacecraft was successfully launched to near-Earth orbit December 14, 2009, to serve as an infrared-wavelength astronomical space telescope.
WISE surveyed the full sky in four infrared wavelength bands (3.4, 4.6, 12 and 22 μm) until the frozen hydrogen cooling the telescope was depleted in September 2010.
The spacecraft was placed into hibernation in February 2011 after completing its search of the inner solar system.
In late 2013, the spacecraft was reactivated and assigned a new mission as NEOWISE to help NASA identify and characterize the population of near-Earth objects (NEOs). NEOs are comets and asteroids that have been nudged into orbits that allow them to enter Earth's neighborhood.
Observations resumed in December 2013 and just six days later NEOWISE discovered its first potentially hazardous near-Earth asteroid: 2013 YP139.
Potentially hazardous asteroids (PHAs) are asteroids that could one day threaten Earth. Near-Earth objects are classified as PHAs based on their size and how closely they can approach Earth's orbit.
As of mid-July 2019, NEOWISE was 24% of the way through its 12th coverage of the sky since reactivation. Over 830,000 infrared measurements have been made of 34,644 different solar system objects, including 1024 NEOs and 172 comets.
The Principal Investigator for NEOWISE is Amy Mainzer of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.
JPL manages and operates the NEOWISE mission for NASA's Planetary Defense Coordination Office within the Science Mission Directorate in Washington.