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101955 Bennu (provisional designation 1999 RQ 36) is a carbonaceous asteroid in the Apollo group discovered by the LINEAR Project on 11 September 1999. It is a potentially hazardous object that is listed on the Sentry Risk Table and has the highest cumulative rating on the Palermo Technical Impact Hazard Scale. [9]
The 1602 Ricci map is a very large, 5 ft (1.52 m) high and 12 ft (3.66 m) wide, woodcut using a pseudocylindrical map projection showing China at the center of the known world. [2] It is the first map in Chinese to show the Americas .
The spacecraft launched on September 8, 2016 and arrived at Bennu in December 2018. After mapping the asteroid for almost two years, it collected a sample from the surface on October 20, 2020. The ...
An early analysis of a sample collected from the asteroid Bennu suggests that the space rock had an unexpectedly water-rich past — and it may have even splintered off from an ancient ocean world.
During this “TAG event,” the spacecraft’s arm sank far deeper into the asteroid than expected, confirming that Bennu’s surface is incredibly weak. Now, scientists have used data from OSIRIS-REx to revisit the TAG event and better understand how Bennu’s loose upper layers are held together.
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Bennu was chosen as the target of study because it is a "time capsule" from the birth of the Solar System. [25] Bennu has a very dark surface and is classified as a B-type asteroid, a sub-type of the carbonaceous C-type asteroids. Such asteroids are considered primitive, having undergone little geological change from their time of formation.