http://www.sciencemag.org/news/2019/12/nasa-selects-target-asteroid-sampling-campaign-summer

SAN FRANCISCO, CALIFORNIA—In December 2018, the scientists behind the Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-Rex), NASA’s $800 million mission to sample the asteroid Bennu and return the rock to Earth, received a nasty shock. Rather than smooth plains of beachlike rubble, Bennu’s coal-dark surface was a jumble of large boulders, with few gaps that might allow the spacecraft’s sampling arm to shoot in and sample its surface grit, as designed.

After extensively mapping the half-kilometer-wide asteroid, including 1-kilometer-high flybys of four candidate sites—its “final four”—the mission has announced its primary sampling target: Nightingale, according to Dante Lauretta, the mission’s principal investigator and a planetary scientist at the University of Arizona in Tucson, who announced the decision today at a meeting of the American Geophysical Union here.