Wide-field Infrared Survey Explorer
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Artist concept of WISE spacecraft
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| Names | MIDEX/WISE, Explorer 92 |
|---|---|
| Mission type | Infrared telescope |
| Operator | NASA / JPL |
| COSPAR ID | 2009-071A |
| SATCAT № | 36119 |
| Website | http://www.nasa.gov/wise |
| Mission duration | Planned: 10 months Elapsed: 7 years, 1 month, 9 days |
| Spacecraft properties | |
| Bus | Ball Aerospace RS-300 |
| Manufacturer |
Ball Aerospace Lockheed Martin Space Dynamics Laboratory SSG Precision Optronics |
| Launch mass | 661 kg (1,457 lb) |
| Payload mass | 347 kg (765 lb) |
| Dimensions | 2.85 × 2 × 1.73 m (9.4 × 6.6 × 5.7 ft) |
| Power | 551 W |
| Start of mission | |
| Launch date | December 14, 2009, 14:09:33 UTC |
| Rocket | Delta II 7320-10 |
| Launch site | Vandenberg SLC-2W |
| Contractor | United Launch Alliance |
| Orbital parameters | |
| Reference system | Sun-synchronous polar |
| Regime | Low Earth |
| Semi-major axis | 6,869.7 km (4,268.6 mi) |
| Eccentricity | 0.000472 |
| Perigee | 488.3 km (303.4 mi) |
| Apogee | 494.8 km (307.5 mi) |
| Inclination | 97.5° |
| Period | 94.45 min |
| RAAN | 156.3° |
| Argument of perigee | 103.1° |
| Mean anomaly | 257.05° |
| Mean motion | 15.25° |
| Velocity | 7.6 km/s (4.7 mi/s) |
| Epoch | May 21, 2015, 03:00:06 UTC |
| Revolution number | 30060 |
| Main telescope | |
| Diameter | 0.4 m (1.3 ft) |
| Wavelengths | 3.4, 4.6, 12 and 22 microns |
| Instruments | |
| Four infrared detectors | |
Wide-field Infrared Survey Explorer (WISE) is a NASA infrared-wavelength astronomical space telescope launched in December 2009, and placed in hibernation in February 2011 when its transmitter turned off. It was re-activated in 2013. WISE discovered thousands of minor planets and numerous star clusters. Its observations also supported the discovery of the first Y Dwarf and Earth trojan asteroid.
WISE performed an all-sky astronomical survey with images in 3.4, 4.6, 12 and 22 μm wavelength range bands, over ten months using a 40 cm (16 in) diameter infrared telescope in Earth orbit. After its hydrogen coolant depleted, a four-month mission extension called NEOWISE was conducted to search for near-Earth objects such as comets and asteroids using its remaining capability.
The All-Sky data including processed images, source catalogs and raw data, was released to the public on March 14, 2012, and is available at the Infrared Science Archive. In August 2013, NASA announced it would reactivate the WISE telescope for a new three-year mission to search for asteroids that could collide with Earth. Science operations and data processing for WISE and NEOWISE take place at the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena.
In May 2016, significant asteroid data arising from the Wide-field Infrared Survey Explorer and NEOWISE missions have been questioned, but the criticism has yet to undergo peer review.
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