Truck-Sized Asteroid Flew Past Earth Yesterday, Coming Within 3,600 km 2023BU By Nancy_A
was quickly able to determine that the asteroid’s path would bring it close to Earth, but there was no danger of impact. Within three days, a number of observatories around the world had made dozens of observations, helping astronomers better refine 2023 BU’s orbit.
This orbital diagram from CNEOS’s close approach viewer shows 2023 BU’s trajectory – in red – during its close approach with Earth on Jan. 26, 2023. The asteroid will pass about 10 times closer to Earth than the orbit of geosynchronous satellites, shown in green. Credit: NASA/JPL-CaltechNASA said that before encountering Earth, the asteroid’s orbit around the Sun was roughly circular, approximating Earth’s orbit, taking 359 days to complete its orbit about the Sun. After the flyby, the asteroid’s orbit will be more elongated, moving it out to about halfway between Earth’s and Mars’ orbits at its furthest point from the Sun. The asteroid will then complete one orbit every 425 days.
Now that astronomers know this asteroid is out there, they’ll keep an eye on when it might have a future encounter with Earth.
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