Huge 2.7-mile long asteroid set for Earth flyby

A massive 2.7-mile long asteroid is set to pass by Earth Friday. There’s no need to worry, though – the asteroid, dubbed Florence, will pass at a safe distance of 4.4 million miles, roughly 18 times the distance between Earth and the Moon.

“While many known asteroids have passed by closer to Earth than Florence will on September 1, all of those were estimated to be smaller,” said Paul Chodas, manager of NASA’s Center for Near-Earth Object Studies (CNEOS) at the agency’s Jet Propulsion Laboratory in Pasadena, Calif. in a statement. “Florence is the largest asteroid to pass by our planet this close since the NASA program to detect and track near-Earth asteroids began.”

The asteroid, which is named in honor of Florence Nightingale, was discovered in 1981. Friday’s flyby will be Earth’s closest encounter with the asteroid since 1890, and the closest it will be to our planet until after 2500.

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Florence has been assigned an asteroid catalog number of 3122.

While ground-based radar will closely observe the giant space rock, NASA says that the asteroid will also be visible to small telescopes. Sky & Telescope reports that Florence reaches peak brightness late on Thursday and early on Friday, it will remain bright for several days. 8 p.m. EDT on Saturday Sept. 2 will be a particularly good time to view the asteroid, it says.  

Earlier this year, a skyscraper-sized asteroid named (441987)…

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