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WISE

P_E_T_E_R

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Die NASA hat heute ein neues Infrarot-Teleskop in den Orbit gebracht:

WISE = Wide-Field Infrared Survey Explorer

Der Satellit befindet sich auf einem polaren Orbit in 500 km Höhe. WISE soll über 9 Monate den gesamten Himmel durchmustern. Die Optik hat eine Öffnung von 40 cm und das Gesichtsfeld des (mit Wasserstoffeis) gekühlten Kamersensors (1 Megapixel) beträgt 47' x 47'. Vier verschiedene Spektralbänder um 3.3, 4.7, 12 und 24 Mikrometer werden erfasst.

Gegenüber älteren IR-Surveys bei ähnlichen Wellenlängen ist die Empfindlichkeit hundertfach verbessert. Man erhofft sich damit die Erfassung aller größeren Asteroiden (> 3km) im Hauptgürtel, schätzungsweise 200 000, des weiteren Kometen, Kuiper Objekte, deep-space Objekte wie Braune Zwerge, IR-Galaxien, ...

Mit freundlichen Grüßen,
Peter

 

Burkard

Mitglied
Re: WISE - Firstlight

Hallo,

inzwischen gab es First Light für das WISE-Teleskop:

Link

Belichtungszeit des Fotos: 8 Sekunden! Alle 11 Sekunden kann ein Bild aufgenommen werden...
Der Sensor arbeitet bei einer Temperatur von bis zu -265 Grad Celsius!
 

Varyonyx

Mitglied
WISE benötigt Unterstützung

Heyho,

die astronomische Gemeinschaft wird aufgerufen das WISE-Project mit "Follow-UP" Beobachtungen zu unterstützen!!!


Gruß Alex (VectorSCOPE)
 

Varyonyx

Mitglied
WISE findet seinen ersten, untentdeckten NEA

Heyho,

das Jet Propulsion Laboratory hat bekanntgegeben daß "WISE" nun seinen ersten bislang unentdeckten NEA entdeckt hat.

Weitere Informationen --> hier

Gruß Alex (VectorSCOPE)
 

P_E_T_E_R

Mitglied
Es ist schon eine Weile her, dass WISE Nachrichten machte.

Reuters/CBC-News - Aug 22, 2013 - NASA space telescope rebooted as asteroid hunter

NASA will reactivate a mothballed infrared space telescope for a three-year mission to search for potentially dangerous asteroids on a collision course with Earth, officials said on Wednesday.

Launched in December 2009, the WISE telescope spent 13 months scouting for telltale infrared signs of asteroids, stars, distant galaxies and other celestial objects, especially those too dim to radiate in visible light. As part of its all-sky mapping mission, WISE observed more than 34,000 asteroids in the main asteroid belt between Mars and Jupiter and another 135 asteroids in orbits that come close to Earth. Overall, scientists cataloged more than 560 million objects with WISE. Most of the telescope's instruments were turned off when its primary mission was completed in February 2011.

NASA plans to bring WISE out of hibernation next month and operate it for another three years, at a cost of about $5 million per year, said NASA spokesman Dwayne Brown. "After a quick checkout, we're going to hit the ground running," WISE astronomer Amy Mainzer, with NASA's Jet Propulsion Laboratory in Pasadena, California, said in a statement.

NASA already has found about 95 percent of the near-Earth asteroids that are 1 kilometre or larger in diameter. The agency is about halfway through a 15-year effort to find 90 percent of all near-Earth objects that are as small as about 140 meters in diameter.

The search took on a note of urgency after a small asteroid blasted through the skies above Chelyabinsk, Russia, in February 2013 and exploded with 20- to 30 times the force of the Hiroshima atomic bomb. More than 1,500 people were injured by flying glass and debris. Later that same day, a much larger but unrelated asteroid soared closer to Earth than the networks of communication satellites that ring the planet.

The events prompted Congressional hearings and new calls for NASA and other agencies to step up their asteroid detection initiatives. The Obama administration proposes to double NASA's $20 million Near-Earth Objects detection programs for the 2014 fiscal year beginning Oct. 1.


Sky & Telescope - More Asteroid Hunting for WISE Spacecraft

It's worth noting that on this day, exactly 10 years ago, a blue-ribbon panel of planetary scientists released a 166-page report detailing the effort required to discover at least 90% of the estimated 500,000 hazardous near-Earth objects with diameters of at least 460 feet (140 m). That was a tall order then, and it remains one today.


 

P_E_T_E_R

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Wie hier vor bald sieben Jahren berichtet, wurde das zunächst stillgelegte Infrarot-Observatorium WISE ja im Herbst 2013 wieder reaktiviert. Seitdem observiert es unter dem Akronym NEOWISE zwar ohne aktive Kühlung, aber nichts desto trotz mit erheblichem Erfolg, unsere Umgebung insbesondere auf erdnahe Asteroiden und Kometen:

Appearing as strings of orange dots, the brightest sets of dots belong to asteroids Klotho and Lina. Both orbit out in the main asteroid belt between Mars and Jupiter, while smaller, more distant asteroids can also be seen passing through the image.

Klotho & Lina

pia23589.jpg

Image Credit: NASA/JPL-Caltech/UCLA
 
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