NASA’s Osiris-Rex asteroid sample return mission is currently orbiting the 500-m (1,640-ft.) wide Bennu at just 680 m altitude, breaking a record the spacecraft previously set when it maneuvered into its initial orbit of 1.3 km altitude on Dec. 31. The latest low-altitude orbital phase, Orbital B, began last week on June 12. For its first 14 days, it will focus on Bennu’s horizon to further study the surprise particle plume surface eruptions first noted by the spacecraft in ...

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