Nasa’s Lucy spacecraft discovers tiny moon around asteroid during close flyby
3 November 2023, 17:34
The discovery was made during Wednesday’s flyby of Dinkinesh, 300 million miles away from Earth.
The little asteroid visited by Nasa’s Lucy spacecraft this week had a big surprise for scientists.
It turns out that the asteroid Dinkinesh has a sidekick — a mini moon.
The discovery was made during Wednesday’s flyby of Dinkinesh, 300 million miles away in the main asteroid belt beyond Mars.
The spacecraft snapped a picture of the pair when it was about 270 miles out, passing at 10,000mph in a dry run for bigger and more alluring asteroids ahead.
In data and images beamed back to Earth, the spacecraft confirmed that Dinkinesh is barely half a mile wide.
Its closely circling moon is a tenth of a mile in size.
Nasa sent Lucy past Dinkinesh as a rehearsal for the bigger, more mysterious asteroids out near Jupiter.
This is why we explore. Turns out that asteroid Dinkinesh is… asteroids Dinkinesh? During the #LucyMission ’s first asteroid flyby on Nov. 1, we discovered that the main belt asteroid is a party of two, or binary pair! https://t.co/3aYWLvWmOw pic.twitter.com/IX2ZHHtRdK
— NASA Solar System (@NASASolarSystem) November 2, 2023
Launched in 2021, the spacecraft will reach the first of these so-called Trojan asteroids in 2027 and explore them for at least six years. The original target list of seven asteroids now stands at 11.
Dinkinesh means “you are marvellous” in the Amharic language of Ethiopia. It is also the Amharic name for Lucy, the 3.2 million-year-old remains of a human ancestor found in Ethiopia in the 1970s, for which the spacecraft is named.
“Dinkinesh really did live up to its name; this is marvellous,” Southwest Research Institute’s Hal Levison, the lead scientist, said in a statement.
