WISE To Rejoin the Hunt

WISE spots asteroid 1998 KN3 (bright yellow spot on left) go by near the Orion nebula. Image Credit: NASA/JPL-Caltech

The WISE spacecraft is being reactivated to continue the hunt for asteroids. WISE was launched in December 2009 and was very successful, discovering more than 33,000 new  asteroids and comets. One of the many interesting discoveries included the brown dwarf star system just 6.5 light years away.

The primary mission ended in October 2010 when the coolant ran out. A new mission called spacecraft began using two (out of four total) that do not require cryogen for cooling. The NEOWISE mission was scheduled to run a month and ended up being extended three months because it worked so well. After the NEOWISE mission the spacecraft was put into hibernation.

It will be nice to have WISE back in the hunt.

About the image from NASA:

This image shows the potentially hazardous near-Earth object 1998 KN3 as it zips past a cloud of dense gas and dust near the Orion nebula. NEOWISE, the asteroid-hunting portion of the Wide-field Infrared Survey Explorer, or WISE, mission, snapped infrared pictures of the asteroid, seen as the yellow-green dot at upper left. Because asteroids are warmed by the sun to roughly room temperature, they glow brightly at the infrared wavelengths used by WISE.

Astronomers use infrared light from asteroids to measure their sizes, and when combined with visible-light observations, they can also measure the reflectivity of their surfaces. The WISE infrared data reveal that this asteroid is about .7 mile (1.1 kilometers) in diameter and reflects only about 7 percent of the visible light that falls on its surface, which means it is relatively dark.
In this image, blue denotes shorter infrared wavelengths, and red, longer. Hotter objects emit shorter-wavelength light, so they appear blue. The blue stars, for example, have temperatures of thousands of degrees. The coolest gas and dust appears red. The asteroid appears yellow in the image because it is about room temperature: cooler than the distant stars, but warmer than the dust.
JPL manages the Wide-field Infrared Survey Explorer for NASA’s Science Mission Directorate, Washington. The principal investigator, Edward Wright, is at UCLA. The mission was competitively selected under NASA’s Explorers Program managed by the Goddard Space Flight Center, Greenbelt, Md. The science instrument was built by the Space Dynamics Laboratory, Logan, Utah, and the spacecraft was built by Ball Aerospace & Technologies Corp., Boulder, Colo. Science operations and data processing take place at the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena. Caltech manages JPL for NASA.

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