Asteroid 2021 RS2 flew past Earth at an exceptionally close distance of 0.06 LD - https://watchers.news/2021/09/08/asteroid-2021-rs2/

Vừa có tiểu hành tinh tiến gần Trái đất nhất năm 2021 - https://laodong.vn/the-gioi/vua-co-tieu-hanh-tinh-tien-gan-trai-dat-nhat-nam-2021-952247.ldo

Earth just had its closest asteroid encounter of 2021 - https://www.cnet.com/news/earth-just-had-its-closest-asteroid-encounter-of-2021/

Asteroid 2021 RS2 flying to Earth this week is the closest asteroid observed so far this year — Science Exploration - https://newsfounded.com/chinaeng/asteroid-2021-rs2-flying-to-earth-this-week-is-the-closest-asteroid-observed-so-far-this-year-science-exploration/

Asteroid RS2 is the next space rock to cross Earth in 2021 - https://live-feeds.com/asteroid-rs2-is-the-next-space-rock-to-cross-earth-in-2021/