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As of 2021, 2021 PH 27 holds the record for the smallest semi-major axis (0.46 AU) and shortest orbital period (114 days) of any known asteroid, supplanting 2019 LF 6 and 594913 ꞌAylóꞌchaxnim (0.56 AU, 151 days). For comparison, Mercury has a semi-major axis of 0.39 AU and an orbital period of 88 days. [14]
The fastest asteroid to pass within 1 LD of Earth in 2023 was 2023 TK 15 that passed Earth with a velocity with respect to Earth of 21.95 km/s (49,100 mph), [4] while the slowest bypass within lunar distance was that of 2023 XQ 16 at a velocity with respect to Earth of 3.16 km/s (7,100 mph). [5]
The lists below are based on the close approach database of the Center for Near-Earth Object Studies (CNEOS), in its state as of 18 February 2025. [2] The database lists any approaches with a minimum distance less than 0.2 astronomical units (AU) from 1900 and until a century into the future which have been derived by orbit calculations.
More portions of Austin and San Antonio will be in the path of totality, while parts of Denton will be excluded, according to new data
Despite ghost lore, the Star Hill lookout in Remson is part of the new widened path and a great spot to witness the 34 seconds of totality from 3:24:47 – 3:25:21 p.m.
A small asteroid will be pulled into orbit around the Earth as a “mini-moon” later this month before the space rock departs into other parts of the solar system.. The 10m-wide asteroid, dubbed ...
The largest asteroid to pass within 1 LD of Earth in 2020 was 2020 LD with an estimated diameter of around 145 meters and an absolute magnitude of 22.4. The fastest asteroid to pass within 1 LD of Earth in 2020 was 2020 FD 2 that passed Earth with a velocity with respect to Earth of 33.4 km/s (75,000 mph). [3] [note 2]
An asteroid for which there is some possibility of a collision with Earth at a future date and which is above a certain size is classified as a potentially hazardous asteroid (PHA). Specifically, an asteroid is a PHA if its Earth minimum orbital intersection distance (MOID) is <0.05 AU and its absolute magnitude is 22 or brighter. [2]