Florence, the Brightest Asteroid, to Pass by Earth on 1 September

A large near-Earth asteroid, Florence, will pass safely by our planet on 1 September.

A large near-Earth asteroid will pass safely by our planet on 1 September at a distance of seven million kilometres, or about 18 Earth-Moon distances, according to NASA.

Asteroid Florence is among the largest near-Earth asteroids that is several miles in size. Measurements from NASA's Spitzer Space Telescope and NEOWISE mission indicate it is about 4.4 kilometres in size.

"While many known asteroids have passed by closer to Earth than Florence will on 1 September, all of those were estimated to be smaller," said Paul Chodas, manager of NASA's Center for Near-Earth Object Studies (CNEOS).

Florence is the largest asteroid to pass by our planet this close since the NASA programme to detect and track near-Earth asteroids began

Chodas said

This relatively close encounter provides an opportunity for scientists to study this asteroid up close. Florence is expected to be an excellent target for ground-based radar observations, NASA said.

The resulting radar images will show the real size of Florence and also could reveal surface details as small as about 10 metres.

Asteroid Florence was discovered by Schelte Bus at Siding Spring Observatory in Australia in March 1981. It is named in honour of Florence Nightingale, the founder of modern nursing.

This year's encounter is the closest by the asteroid since 1890 and the closest it will ever be until after 2500, according to the US space agency.

Florence will brighten to ninth magnitude in late August and early September, when it will be visible in small telescopes for several nights as it moves through the constellations Piscis Austrinus, Capricornus, Aquarius and Delphinus.

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