NASA's OSIRIS-REx Checks for Collision Hazards As It Nears Asteroid Bennu

NASA's OSIRIS-REx Checks for Collision Hazards As It Nears Asteroid Bennu

NASA's OSIRIS-REx Checks for Collision Hazards As It Nears Asteroid Bennu







		After a large engineering team has spent years building an $ 800 million spacecraft, you'll want to make sure the ship does not hit anything before it has a chance to start working in earnest.

		That is the thinking of NASA with the agency. OSIRIS-REx mission, which is aimed at exploring an asteroid named Bennu and learn more about the first days of the solar system. Then, while the spacecraft was 620,000 miles (1 million kilometers) from its target, it took a moment to verify if there were cosmic remains that could threaten a collision.



				1, 2, 3, Bennu! Earlier this week, I captured these images of my favorite asteroid growing larger, from about 1 pixel to almost 4 pixels in PolyCam's field of view, as I continue to approach Bennu.

More details: https://t.co/C5MRW4VzIf pic.twitter.com/RM4EmewI7W

		- OSIRIS-REx of NASA (@OSIRISREx) October 18, 2018

		The mission team is concerned about two types of potential threats: dust plumes and tiny moons. The first safety control focused on the plumes of dust, which would be caused by the material flying Bennu or his neighbors. The search came out clean and the spacecraft continues at its planned pace towards its destination.

		But there will be more security checks to come. By the end of this year, the spacecraft will search for natural satellites that may be in orbit around Bennu, tiny moons up to 10 cm (4 inches) wide. If the OSIRIS-REx instruments detect such moons, the probe will stop at a distance of 25 to 30 miles (40 to 50 km) from its final objective to gather more data and ensure that the approach can continue safely.





						


Artistic representation of the OSIRIS-REx spacecraft in search of feathers and other potential dangers as it approaches the asteroid Bennu.

            						    Credit: University of Arizona 


		A third scan early next spring, when OSIRIS-REx will be only 3 miles (5 km) from the asteroid, will search again for any feather before the spacecraft. keeps dancing closer and closer to your rocky target.

		But despite the inherent risk of navigating around a moon or plume, the OSIRIS-REx team would not necessarily be upset to discover one or both of them in the spacecraft's path. These objects would provide new and intriguing data about this neighborhood of the solar system and its history, NASA said.



				Good news! Yesterday, I successfully ejected the flight deck on my TAGSAM sampling arm. I also made two turns, called Mass Measurement Samples, before and after to confirm that my mass changed about 2.5 pounds (approximately the weight of the cover). pic.twitter.com/wkugxtoKQ6

		- OSIRIS-REx of NASA (@OSIRISREx) October 18, 2018

		Everything clear from the first security check of the ship means that OSIRIS-REx can continue its journey. In another recent development, the spacecraft successfully ejected a cover that protected the sampling arm of the probe. This means that once OSIRIS-REx finally arrives, will be ready to go to work.



	Email Meghan Bartels in mbartels@space.com or follow it @meghanbartels. Follow us @Spacedotcom    Y Facebook. Original article about Space.com.

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