© AFP PHOTO / JAXASurface of the Ryugu asteroid photographed by Japanese Minerva-II rover-1B in September 2018
The Japanese Space Exploration Agency (JAXA) confirmed that Hayabusa2 "has carried out operations to separate the SCI (Small Carry-on Impactor)" in a statement on its website. The probe then moved out of the blast zone, ducking behind the other side of the same asteroid - Ryugu, or 'Dragon Palace,' located almost 300 million kilometers from Earth.
The impactor was expected to detonate 40 minutes after launch, but JAXA will not know for certain if it worked as intended until late April. For now, it has provided a picture of the detached explosive, taken with Hayabusa2's onboard camera.
© JAXA, The University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University, The University of Aizu, AISTSmall Carry-on Impactor separated from Hayabusa2
The 'bomb' sent a 2kg (4.4-pound) copper "impact head" at the asteroid in order to create an artificial crater. When Hayabusa2 lands on Ryugu in May, it will be able to study the inside of the crater, where the ancient asteroid has not been affected by outside radiation, revealing an insight into the solar system's history.
It's not the first time that Hayabusa2 has "attacked" Ryugu during its nine months at the asteroid. In February, it shot a smaller "bullet" at its surface to grab bits of broken-off matter and study them for signs of organic molecules that could have been a precursor of life on Earth. It has also landed two tiny rovers on the asteroid and is scheduled to land two more.
Comment: See also: Japanese rovers send back 1st video ever taken on an asteroid