  The Origins, Spectral Interpretation, Resource Identification, and Security
Regolith Explorer (OSIRIS-REx) spacecraft arrived at its target, near-Earth
asteroid 101955 Bennu, in December 2018. After one year of operating in
proximity, the team selected a primary site for sample collection. In October
2020, the spacecraft descended to the surface of Bennu and collected a sample.
The spacecraft departed Bennu in May 2021 and will return the sample to Earth
in September 2023. The analysis of the returned sample will produce key data to
determine the history of this B-type asteroid and that of its components and
precursor objects. The main goal of the OSIRIS-REx Sample Analysis Plan is to
provide a framework for the Sample Analysis Team to meet the Level 1 mission
requirement to analyze the returned sample to determine presolar history,
formation age, nebular and parent-body alteration history, relation to known
meteorites, organic history, space weathering, resurfacing history, and energy
balance in the regolith of Bennu. To achieve this goal, this plan establishes a
hypothesis-driven framework for coordinated sample analyses, defines the
analytical instrumentation and techniques to be applied to the returned sample,
provides guidance on the analysis strategy for baseline, overguide, and
threshold amounts of returned sample, including a rare or unique lithology,
describes the data storage, management, retrieval, and archiving system,
establishes a protocol for the implementation of a micro-geographical
information system to facilitate co-registration and coordinated analysis of
sample science data, outlines the plans for Sample Analysis Readiness Testing,
and provides guidance for the transfer of samples from curation to the Sample
Analysis Team.
