Asteroid 2021 RS2 flew past Earth at an exceptionally close distance

The newly discovered asteroid 2021 RS2 flew past Earth at a distance of only 0.06 LD / 0.00015 AU (22,440 km / 13,945 miles) from the center of our planet at 07:28 UTC on September 8, 2021.

This is the 81st known asteroid to have passed Earth within 1 moon since the beginning of the year.

It is also the closest flyby this year and the 21st closest in history, sharing space with 2021 CZ3, which flew past us on February 9, 2021. It is worth noting that the two closest overflights in history occurred in 2020 – 2020 QG on August 16 and 2020 VT4 on November 13.

This flyby was followed by 2021 RP2 today at 13:50 UTC at 0.31 LD and 2021 RQ2 on September 9 at 00:44 UTC at 0.49 LD.

2021 RS2 was first seen in the Mt. Lemmon Survey on September 7, the day before it came very close to our planet.

The object belongs to the Apollo asteroid group and has an estimated diameter of 2.3 to 5.1 m (7.5 to 16.7 ft).

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