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OSIRIS-REx Mission
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NASA's mission to visit asteroid Bennu and return a sample of the asteroid to Earth.
NASA's mission to visit asteroid Bennu and return a sample of the asteroid to Earth.

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The preliminary results are in, and OSIRIS-REx's second Asteroid Approach Maneuver executed as expected! ๐ŸŽ‰๐ŸŽ‰

This main engine braking burn was designed to slow the spacecraft from about 315 mph (141 m/sec) to 11.8 mph (5.2 m/sec) relative to Bennu: http://bit.ly/AAM2Prelim
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OSIRIS-REx is almost ready for its second Asteroid Approach Maneuver (AAM-2)!

Today is the second time the spacecraft will conduct a braking maneuver as it approaches asteroid Bennu, slowing its speed from about 313 to about 11.8 miles per hour (140 to 5.3 meters per second) relative to Bennu. Full infographic: http://bit.ly/AAM1Info
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OSIRIS-REx has now traveled more than 1.9 billion kilometers (1.2 billion miles) on its journey to asteroid Bennu.

More on the spacecraft's status and progress: http://bit.ly/WhereIsOREX
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Images taken by OSIRIS-REx's PolyCam camera between Aug. 17 and Oct. 1 show asteroid Bennu (in the center of the frame) growing brighter as the spacecraft approaches.

From the first to the last frame, the spacecraftโ€™s range to Bennu decreased from 2.2 million km to 192,000 km. More about this imagery: http://bit.ly/2QB9vUW
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The preliminary results are in, and OSIRIS-REx's first Asteroid Approach Maneuver executed as expected! ๐ŸŽ‰

This main engine braking burn was designed to slow the spacecraft's speed from about 1,100 mph (491 m/sec) to 313 mph (140 m/sec). The mission team will continue analyzing the telemetry and tracking data and will have more details later this week: http://bit.ly/AAM1Prelim
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Today OSIRIS-REx is executing Asteroid Approach Maneuver-1, which is the first in a series of braking maneuvers that will slow the spacecraft's speed as it approach asteroid Bennu.

The spacecraft's cruising speed before AAM-1 is about 1,100 miles per hour (490 meters per second). More pre-AAM-1 stats: http://bit.ly/WhereIsOREX
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Happy Sample Return Day! โ˜„๏ธ๐ŸŽ‰

Five years from today, the OSIRIS-REx Sample Return Capsule -- carrying at least 60 grams of surface material from asteroid Bennu -- will land at the Utah Test and Training Range west of Salt Lake City.
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One year ago, OSIRIS-REx made a flyby of home, cruising low over Antarctica and using Earth's gravity to boost itself upward onto asteroid Bennu's orbital plane. ๐Ÿ›ฐ โ†ช๏ธ ๐ŸŒ http://bit.ly/OREx1YrEGA

Later this year, the spacecraft will arrive at Bennu: http://bit.ly/AsteroidOps
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Milestone alert: OSIRIS-REx now has less than 200 million kilometers (123 million miles) to travel before the spacecraft's rendezvous with asteroid Bennu.

More about OSIRIS-REx's progress on the journey: http://bit.ly/WhereIsOREX
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This morning, the Frangibolt on the flight cover of REXIS โ€“ the student-built x-ray spectrometer that will help OSIRIS-REx map elements on Bennuโ€™s surface โ€“ fired as planned and opened the instrument's cover.

With the cover open, REXIS now has a clear view of space and is ready to collect data as the spacecraft approaches asteroid Bennu.

Image credit: Massachusetts Institute of Technology
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