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2021 UA 1 is a small (~2 meter) near-Earth object that passed about 3047 km from the surface of Earth while passing over Antarctica on 25 October 2021 around 03:07 UT. [ 5 ] [ a ] Given the small size of the asteroid it only reached the brightness of Pluto at around apparent magnitude 14 . [ 5 ]
The object was then provisionally designated 2021 PH 27 by the Minor Planet Center and announced on 21 August 2021. [1] Even in April 2021, the asteroid was never more than 45 degrees from the Sun. [11] Precovery observations of 2021 PH 27 were found in archival Dark Energy Survey images from 16 July 2017. These observations were published by ...
The largest asteroid to pass within 1 LD of Earth in 2021 was 2021 SG with an estimated diameter of around 68 meters and an absolute magnitude of 24.0. The fastest asteroid to pass within 1 LD of Earth in 2021 was 2021 UA 7 that passed Earth with a velocity with respect to Earth of 27.7 km/s (62,000 mph).
Watch live as a Nasa spacecraft returns to Earth with the largest asteroid sample in history on Sunday 24 September. After a seven-year, four-billion-mile journey across space, the ambitious NASA ...
It completes its highly eccentric orbit in 2.24 years. 2021 SG is an Apollo asteroid with a 1.71 AU semimajor axis, and a 0.473 AU perihelion (near Mercury at perihelion) out to a 2.95 AU aphelion (between Mars and Jupiter). With an absolute magnitude (H) of 24.0, it is possibly the largest asteroid to pass within 1 lunar distance of Earth ...
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Another gigantic asteroid will come within Earth's neighborhood on Wednesday, and Earthlings can watch it live online, knowing it's at a safe distance.
2021 TP 21 is an Apophis-sized asteroid that was discovered on 11 October 2021 when it was 0.5 AU (75 million km) from Earth. [1] This potentially hazardous asteroid (PHA) spends most or its orbit closer to 4 AU (600 million km) from the Sun as objects orbit more slowly when near aphelion (furthest distance from the Sun).