The robotic spacecraft OSIRIS-REx is scheduled to release the gumdrop-shaped capsule, transporting about a cup of gravelly asteroid material, at 6:42 a.m. EDT (1042 GMT) for a final descent to Earth, climaxing a seven-year voyage.
The spacecraft departed Bennu in May 2021 for a 1.2-billion-mile (1.9-billion-km) cruise back to Earth, including two orbits around the sun.
The Bennu sample is estimated at 250 grams (8.8 ounces), far surpassing the 5 grams of material carried back from Ryugu in 2020 or the tiny specimen delivered from asteroid Itokawa in 2010.
Scientists hope the integrity of the capsule and inner cannister bearing the asteroid material will be maintained through re-entry and landing, keeping the sample pristine and free of any terrestrial contamination.
The main portion of the OSIRIS-REx spacecraft, meanwhile, is expected to sail on to explore yet another near-Earth asteroid, named Apophis.
Persons:
Joel Kowsky, REx, climaxing, NASA's, Steve Gorman, Rosalba O'Brien
Organizations:
United Launch Alliance, V, Cape Canaveral Air Force, NASA, Handout, Reuters, University of Arizona, Empire, NASA's Johnson Space Center, Thomson
Locations:
Florida, U.S, Utah, Salt Lake City, military's, Ryugu, Houston, Los Angeles