WEBVTT FILE

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[music]

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On December 3, NASA's
OSIRIS-REx mission arrived at

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its target:
near-Earth asteroid Bennu.

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We have arrived!

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[applause]

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Now, OSIRIS-REx has
completed its Preliminary Survey

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of Bennu.

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Preliminary Survey is a series
of maneuvers about two days

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apart, and consists of
five hyperbolic flybys, so

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essentially a straight line
relative to the asteroid.

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And we do three of those over
the northern hemisphere, we do

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one over the equator, and
we do one under the southern

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hemisphere.

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And that allows the scientists
an opportunity to collect lots

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and lots of imaging data that
aids in building shape models,

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and also eventually in
sample site selection.

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At the completion of Preliminary
Survey, which is about three

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weeks, we'll drift away from the
asteroid, come back, and insert

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into orbit on December 31.

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What's really groundbreaking
about the navigation on this

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mission is the size of Bennu.

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Bennu is the smallest object to
ever be orbited by a spacecraft.

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The gravity is so low that we
can effectively maneuver all

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around the asteroid with
very little fuel cost.

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After its initial orbital
phase, OSIRIS-REx will conduct a

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Detailed Survey of Bennu

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in preparation for collecting a
sample and returning it to Earth

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in 2023.

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[music]

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[satellite beeping]