Asteroid 2021 UA1 flew past Earth at a distance of only 3,000 km

The newly discovered asteroid 2021 UA1 flew past Earth at a very close distance of only 0.02 LD / 0.0000630 AU (9,424 km / 5,856 miles) from the center of our planet at 03:07 UTC on October 25, 2021. This is about 3,000 km (1,800 miles) from the surface.

It is currently the third closest known asteroid to have passed Earth. Interestingly, the first two positions are occupied by asteroids that flew past us just last year – 2021 VT4 on November 13 and 2020 QG on August 16.

Since the beginning of the year, our observations of the sky have found 110 known asteroids orbiting within 1 moon of us.

2021 UA1 was first spotted in Catalina Sky Surveyor, Arizona on October 25, the same day as its close approach.

The object belongs to the Aten asteroid group and has an approximate diameter of 1.2 to 2.6 m (3.9 to 8.5 ft).

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