{"id":103484,"date":"2018-12-04T07:15:27","date_gmt":"2018-12-04T07:15:27","guid":{"rendered":"https:\/\/www.bnreport.com\/nasas-osiris-rex-spacecraft-has-finally-arrived-at-asteroid-bennu\/"},"modified":"2018-12-04T07:15:27","modified_gmt":"2018-12-04T07:15:27","slug":"nasas-osiris-rex-spacecraft-has-finally-arrived-at-asteroid-bennu","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/nasas-osiris-rex-spacecraft-has-finally-arrived-at-asteroid-bennu\/","title":{"rendered":"NASAs OSIRIS-REx spacecraft has finally arrived at asteroid Bennu"},"content":{"rendered":"

A spacecraft designed to pick up pieces of an asteroid and bring them back to Earth has finally reached its destination. After a two-year journey, NASAs OSIRIS-REx spacecraft<\/a> caught up with asteroid Bennu, currently located nearly 130 million kilometers from Earth, on December 3.<\/p>\n

\u201cWe have arrived!\u201d Javier Cerna, a telecommunications systems engineer with aerospace and defense company Lockheed Martin in Littleton, Colo., announced when the spacecraft signal came through.<\/p>\n

At just 500 meters wide, Bennu is the smallest object ever to be \u201corbited\u201d by a spacecraft. But the asteroids slight gravity is too weak to keep OSIRIS-REx in a circular orbit the way a satellite might orbit a planet like Earth. So the spacecraft will perform a series of precision maneuvers to keep up with the asteroid.<\/p>\n

\u201cIt will really be record-breaking in terms of the precision navigation that weve done in space,\u201d said navigation engineer Coralie Adam of KinetX Aerospace, an Arizona-based engineering company.<\/p>\n

Over the next 18 months, OSIRIS-REx will map the asteroid with five scientific instruments and pick out the best spot to grab material from one of the oldest objects in the solar system.<\/p>\n

Planetary scientists think Bennu is a leftover remnant from the earliest days of the solar system, about 4.5 billion years ago. Remote observations have shown that the asteroid is rich in carbon, a necessary ingredient for life on Earth. Such asteroids could have brought organic molecules to Earth or other planetary bodies, and may hold the key to understanding the origins of life.<\/p>\n

But scientists need samples from such asteroids as Bennu to figure that out. OSIRIS-REx will use an instrument called TAGSAM, short for Touch-And-Go Sample Acquisition Mechanism, to pick up 60 grams to two kilograms of dust and sand from Bennus surface. That sample will be the largest returned from space since the Apollo missions to the moon in the 1970s, and the largest ever picked up by a robot. The probe will collect the material in 2020 and return it to Earth in 2023.<\/p>\n

\u201cOur science team is very eager to study this material that well get back from Bennu,\u201d said OSIRIS-REx project manager Rich Burns of NASAs Goddard Space Flight Center in Greenbelt, Md. \u201cThis is material thats been around since the beginning of the solar system.\u201d<\/p>\n

OSIRIS-REx is the first U.S. sample return mission to an asteroid, but not the first such mission overall. Japans Hayabusa mission<\/a> returned a tiny amount of asteroid Itokawa to Earth in 2010 (SN Online: 6\/14\/10<\/em>). The follow-up mission, Hayabusa2, reached asteroid Ryugu in June<\/a> and will return samples of that asteroid in 2020 (SN Online: 6\/27\/18<\/em>).<\/p>\n

<\/a><\/strong> <\/a>
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science news<\/a><\/h5>\n

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