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Lucy’s major belt goal has its options named

September 17, 2025
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Lucy's main belt target has its features named
Picture of asteroid Donaldjohanson with options marked. Credit score: NASA Goddard/SwRI/Johns Hopkins APL

When contemplating the unnamed main options of all of the moons, asteroids, and comets in our photo voltaic system, there are nonetheless lots of locations on the market that want correct names. Meaning the Worldwide Astronomical Union (IAU), the non-governmental physique chargeable for naming astronomical objects, has its work reduce out for them.

Lately they tackled a comparatively straightforward problem by approving a sequence of names on the asteroid Donaldjohnson, the primary and solely goal of NASA’s Lucy mission in the primary asteroid belt. With these names come an entire new technique to speak about one of many asteroids that humanity has studied most carefully to this point.

Lucy the mission was named after Lucy the fossil, probably the most essential paleoanthropological finds in historical past. Dated to three.2 million years in the past, the Lucy skeleton is a part of a species we now name Australopithecus afarensis, one of many forbearers of recent day Homo sapiens. With this discovery within the Afar area of Ethiopia in 1974, American paleoanthropologist Donald Johanson cemented his legacy within the annals of scientific historical past.

The IAU additionally allowed him to be etched into the historical past books of astronomy as effectively, when it agreed to call the asteroid in the primary belt that the Lucy mission would cross on its technique to its major mission within the Trojan asteroid belt after him. Asteroid Donaldjohanson measures about 8 km lengthy by 3.5 km extensive, and weighs about 8×1013 kg. Its form supplies some very distinctive locations to call, and Lucy’s group tried to take full benefit of that within the names they submitted to the IAU.

The entire names deal by some means with paleoarchaeological historical past, although just some are directed associated to Donald Johanson himself. The 2 major “lobes” of the asteroid are named Afar, after the area in Ethiopia the place the Lucy fossil was found, and Olduvai, a river gorge in Tanzania the place there have been loads of different discoveries of early people.

Becoming a member of the 2 lobes is Windover Collum, named after an archaeological website close to Cape Canaveral Florida, the place Lucy was launched, and which give perception into the lives of people dwelling there over 7,000 years in the past. Two flat surfaces on the collum, which could be considered the asteroid’s “neck,” are referred to as Hadar, after the particular website Lucy was present in, and Minatogawa, the location of the oldest hominid stays present in Japan. Whereas JAXA, Japan’s house company, did not assist with this mission specifically, they have been a serious collaborator of NASA for many years.

Main boulders and craters obtained names as effectively. Mungo, named after the Lake Mungo archaeological website in New South Wales Australia, is a crater close to the tip of the Olduvai lobe. Boxgrove is a boulder close by named after an virtually 500,000 fossil from England. Narmada is one other crater named after archaic stays from India, and it’s close to boulders named Cashel, after a 4,000-year-old discovery in Eire, and Kennewick, an 8,500-year-old skeleton from Washington state close to the Columbia River within the U.S. All of these are additionally on the Olduvai lobe, which is the bigger of the 2.

One other characteristic on the Windover part is one other ridge named after Luzia, a 11,500-year-old skeleton from Brazil. There are undoubtedly options on the opposite facet of the asteroid, however sadly Lucy solely carried out a short flyby and could not seize it in its entirety.

Nevertheless, that was as a result of it is on its technique to its major mission, which is to go to eight Trojan asteroids. That can give the mission group loads extra naming alternatives. We’ll see what they provide you with—and what the IAU will approve—starting in 2027 when its mission actually begins.

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Universe In the present day


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