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Lucy spacecraft discovered one other asteroid behind the asteroid Dinkinesh

November 3, 2023
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Lucy spacecraft discovered one other asteroid behind the asteroid Dinkinesh
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Asteroid Dinkinesh and its smaller asteroid

The asteroid Dinkinesh and its smaller orbiting asteroid

NASA/Goddard/SwRI/Johns Hopkins APL/NOAO

NASA’s Lucy spacecraft has flown previous its first asteroid, and located a second one on the similar time. Lucy flew previous the small asteroid Dinkinesh on 1 November, and the pictures it has despatched again to Earth have revealed that Dinkinesh has an excellent smaller house rock orbiting it – the smallest predominant belt asteroid ever noticed up shut.

This discovering wasn’t solely a shock. As Lucy approached Dinkinesh over the previous few weeks, the asteroid’s brightness appeared to oscillate over time, which is commonly a sign of the presence of some kind of satellite tv for pc. Dinkinesh is simply about 790 metres throughout, although, so it was unimaginable to identify its satellite tv for pc from Earth and even the spacecraft was nonetheless too distant till 1 November to inform for certain.

Throughout the 1 November flyby, Lucy flew simply 430 kilometres away from Dinkinesh at a pace of about 16,000 kilometres per hour, snapping footage because it glided by. The images revealed a second small asteroid in a binary with Dinkinesh, this one solely about 220 metres throughout.

“We knew this was going to be the smallest predominant belt asteroid ever seen up shut,” mentioned Keith Noll at NASA’s Goddard Area Flight Middle in Maryland in a statement. “The truth that it’s two makes it much more thrilling. In some methods these asteroids look much like the near-Earth asteroid binary Didymos and Dimorphos that [NASA’s Double Asteroid Redirection Test mission] noticed, however there are some actually attention-grabbing variations that we are going to be investigating.”

The principle aim of the flyby was to check Lucy’s scientific devices, specifically the system that retains it pointed at its goal because it hurtles by, and the truth that these first photos present something in any respect demonstrates that the monitoring system is working correctly. The remainder of the info from the encounter will likely be despatched again to Earth over the subsequent week or so for the mission’s scientists and engineers to dig into extra totally.

Now that Lucy is previous Dinkinesh and its associate asteroid, its subsequent goal is the asteroid 52246 Donaldjohanson, which it would go to in 2025 earlier than dashing onwards to Jupiter’s Trojan asteroids. The Trojans journey simply forward of and behind Jupiter because it orbits the solar, and they’re in all probability crumbs left over from the formation of the photo voltaic system, so they may maintain priceless insights as to how the planets fashioned and developed over time. Lucy will attain the Trojans in 2027.

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