11th International Planetary Probe Workshop (2014) 8066.pdf Overview of the OSIRIS-REx Parachute Recovery Subsystem. Sajjad Reza1, Jerry Rowan and Al Witkowski2, 1Lockheed Martin Space Systems, 12257 S. Wadsworth Blvd, Littleton, CO 80125, [email protected], 2Pioneer Aerospace, 45 Satellite Rd, South Windsor, CT 06074, [email protected], [email protected] Introduction: In 2016 the Origins-Spectral Interpreta- tion-Resource Identification-Security-Regolith Explor- er (OSIRIS-REx) spacecraft will launch to a near Earth asteroid called Bennu to collect samples and return them to Earth in 2023 for detailed analysis. OSIRIS- REx is the third New Frontiers program mission and is expected to return between 60 grams to 2kg of the as- teroid sample. A Sample Return Capsule (SRC) based on the Stardust heritage design that successfully re- turned comet Wild 2 dust samples to Earth, will incor- porate a Parachute Recovery Subsystem (PRS) to pro- vide stability and deceleration from Mach 1.8 to ground impact. The PRS for OSRIS-Rex comprises of a mortar to deploy the drogue, a 0.83m diameter drogue parachute used to stabilize the SRC, and a 7.3m solid cloth triconic main parachute. The PRS is based on the Stardust PRS design; however modifications to the system were made to bring the PRS within current material and workmanship standards, remove un- needed components, and strengthen some parachute materials as a result of the increased SRC mass when compared to Stardust. This paper provides a general overview of the planned PRS design and expected op- eration. Modifications to the Stardust design of the drogue and main parachute, and design and testing of a new PRS mortar will also be discussed. .