Tucson Local Media's favorite space probe, the University of Arizona's OSIRIS-REx, is getting ever-closer to a key moment in its mission of gathering cosmic dust and pebbles from the surface of the asteroid Bennu.
On Tuesday, April 14, the NASA spacecraft captured the closest-ever images of the asteroid Bennu during a sample collection rehearsal. The images, taken only 200 feet from the asteroid's surface, show the rocky terrain that the OSIRIS-REx spacecraft plans to capture a sample of on Aug. 25.
According to UA, the images were recorded over a ten-minute span during sample collection rehearsal. The images show the spacecraft’s sampling arm – called the Touch-And-Go Sample Acquisition Mechanism – and Bennu's "Nightingale" sample site.
The UA/NASA mission launched on Sept. 8, 2016, and is expected to return to Earth with a sample of the asteroid's surface on Sept. 24, 2023. While OSIRIS-REx is anticipated to be the first U.S. space mission to return samples from an asteroid, the spacecraft will not land on Bennu's surface. Instead, it will use the Touch-And-Go Sample Acquisition Mechanism to shoot a jet of nitrogen, dislodging particles from the asteroid. The spacecraft is expected to be able to capture upwards of 60 grams worth of carbonaceous dust and rock ejected from Bennu's surface.