#astronomy OSIRIS-REx pattern assortment website chosen on asteroid Bennu – Astronomy Now

December 19, 2019 - Comment

A detailed-up view of the Nightingale pattern assortment website on asteroid Bennu with an overlaid graphic exhibiting the relative measurement of NASA’s OSIRIS-REx spacecraft. The mound of boulders casting a shadow to the best rises 30 metres from the ground of the melancholy. Picture: Goddard Area Flight Heart, College of Arizona Out of 4 finalists,



A detailed-up view of the Nightingale pattern assortment website on asteroid Bennu with an overlaid graphic exhibiting the relative measurement of NASA’s OSIRIS-REx spacecraft. The mound of boulders casting a shadow to the best rises 30 metres from the ground of the melancholy. Picture: Goddard Area Flight Heart, College of Arizona

Out of 4 finalists, NASA has chosen a promising website on the asteroid Bennu the place the company’s OSIRIS-REx spacecraft will try to snag rock and soil samples subsequent summer time. If all goes properly, the samples will probably be returned to Earth in 2023.

The popular website, generally known as Nightingale, supplies one of the best steadiness between danger and scientific reward, researchers say, providing a chance to gather natural and water-bearing materials from the early photo voltaic system.

However it will likely be a problem for spacecraft navigators. A mound of boulders dubbed “Mount Doom” rises to at least one facet of the pattern website, an obstruction that OSIRIS-REx should keep away from to execute a “touch-and-go” assortment.

“It’s a considerable, building-size obstruction, and we’re attempting to get right into a crater that’s on the order of some parking zone areas vast,” mentioned Dante Lauretta, the OSIRIS-REx principal investigator on the College of Arizona.

“So we’re doing a extremely tight job parking. We’re conscious that we’ve hazards round us. So precision navigation to that pattern materials is our greatest problem.”

The Origins, Spectral Interpretation, Useful resource Identification, and Safety-Regolith Explorer — OSIRIS-REx — was launched from Cape Canaveral in September 2016 and braked into orbit round Bennu two years later.

In case of issues reaching the Nightingale pattern assortment website, the OSIRIS-REx spacecraft will goal a backup website generally known as Osprey. Picture: Goddard Area Flight Heart, College of Arizona

The spacecraft is supplied with a “Contact-and-Go Pattern Acquisition Mechanism,” or TAGSAM, machine on the top of a 10-foot-long robotic arm. The acquire samples, OSIRIS-REx will slowly transfer in towards Bennu, briefly urgent the pie pan-shaped TAGSAM collector in opposition to the asteroid’s floor.

A jet of nitrogen fuel will fire up soil and small rocks that can then be snagged by TAGSAM’s collector. The fabric will probably be positioned in a pattern return container for a two-and-a-half-year flight again to Earth.

The problem for mission planners is Bennu’s rubble-pile floor. The asteroid is roofed in rocks and rocky fragments, most too giant to be collected by OSIRIS-REx.

“Once we first obtained there, the obvious characteristic that we noticed have been these ample, very giant boulders and general a tough and rugged floor very completely different than what we designed the spacecraft to pattern,” Lauretta mentioned.

Asteroid Bennu. Picture: College of Arizona

“We have been (planning for) sampling areas that have been 25 metres (80 toes) throughout, and fairly actually, I believed it was going to be apparent from the primary pictures the place the pattern areas have been and that it was going to be a simple website choice. And it was nothing of the kind.”

Nightingale was chosen from 4 finalist pattern websites.

“We recognise that this does have some hazards round it, and so we’re doing plenty of work to make it possible for we’re concentrating on the secure areas,” mentioned Lauretta. “However this one actually got here out on prime due to the scientific worth.”



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