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OSIRIS-REx: Sample Return from Asteroid (101955) Bennu

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In May of 2011, NASA selected the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) asteroid sample return mission as the third mission in the New Frontiers program. The other two New Frontiers missions are New Horizons, which explored Pluto during a flyby in July 2015 and is on its way for a flyby of Kuiper Belt object 2014 MU69 on January 1, 2019, and Juno, an orbiting mission that is studying the origin, evolution, and internal structure of Jupiter. The spacecraft departed for near-Earth asteroid (101955) Bennu aboard an United Launch Alliance Atlas V 411 evolved expendable launch vehicle at 7:05 p.m. EDT on September 8, 2016, on a seven-year journey to return samples from Bennu. The spacecraft is on an outbound-cruise trajectory that will result in a rendezvous with Bennu in November 2018. The science instruments on the spacecraft will survey Bennu to measure its physical, geological, and chemical properties, and the team will use these data to select a site on the surface to collect at least 60 g of asteroid regolith. The team will also analyze the remote-sensing data to perform a detailed study of the sample site for context, assess Bennu’s resource potential, refine estimates of its impact probability with Earth, and provide ground-truth data for the extensive astronomical data set collected on this asteroid. The spacecraft will leave Bennu in 2021 and return the sample to the Utah Test and Training Range (UTTR) on September 24, 2023.

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Asteroid Approach Maneuver


Application Process Identifier Definition


Advanced System for Integration and Spacecraft Test


Assembly, Test, and Launch Operations


Astronomical Unit: the average distance between the Earth and the Sun


Characteristic energy of launch


Delta-Differential One-way Ranging


Declination of the Launch Asymptote


Design Reference Asteroid


Design Reference Mission


Deep Space Maneuver


Deep Space Network


Eight-Color Asteroid Survey


Earth gravity assist


Flight Dynamics System


Front End Data System


Flight Operations Bucket


universal coefficient of gravity (G) multiplied by the mass of a planetary object (M)


Guidance, Navigation, and Control


Gravity Recovery and Interior Laboratory mission


Ratio of reflected energy to incoming energy (i.e. irradiance/solar flux)


Institute of Environmental Sciences and Technology


International Organization for Standardization


Integrated Global Science Value Map


Jet Propulsion Laboratory


NASA Johnson Space Center


Light Detection and Ranging


Lincoln Near-Earth Asteroid Research survey


Mars Atmosphere and Volatile EvolutioN mission


Microparticle Impact Collection


Mars Reconnaissance Orbiter


Mission Support Area


Mean Sea Level


National Aeronautics and Space Administration


Near-Earth asteroid


Near-Earth Asteroid Rendezvous mission


Natural Feature Tracking


OSIRIS-REx Camera Suite


OSIRIS-REx Laser Altimeter


Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer


OSIRIS-REx Thermal Emission Spectrometer


OSIRIS-REx Visible and Infrared Spectrometer


Planetary Data System


Preliminary-examination Team


Particle Size Frequency Distribution


Regolith X-ray Imaging Spectrometer


Red, Green, Blue


Right Ascension of the Launch Asymptote


Region of Interest


Sample Analysis Plan


Sample Acquisition and Return Assembly




S—Spacecraft ephemeris; P—Planet, satellite, comet, or asteroid ephemerides; I—Instrument description kernel; C—Pointing kernel; E—Events kernel


Spacecraft and Planet Kernel


Science Processing and Operations Center


Sample Return Capsule


Touch and Go


Touch and Go Camera System


Touch and Go Sample Acquisition Mechanism


Utah Test and Training Range


Visible and Near-Infrared


Yarkovsky–O’Keefe–Radzievskii–Paddack effect


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The launch of OSIRIS-REx was the culmination of over a decade of hard work by thousands of people across the globe. This event marked the beginning of one of the greatest scientific expeditions of all time—sample return from asteroid Bennu. We thank the multitude of team members and their families for the dedication and support of this mission. This material is based upon work supported by NASA under Contracts NNM10AA11C, NNG12FD66C, and NNG13FC02C issued through the New Frontiers Program. Copy editing and indexing provided by Mamassian Editorial Services.

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Lauretta, D.S., Balram-Knutson, S.S., Beshore, E. et al. OSIRIS-REx: Sample Return from Asteroid (101955) Bennu. Space Sci Rev 212, 925–984 (2017).

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