Figure Zi: JAXA, as well as a number of scientific research institutes and institutions involved in the Falcon 2 project (via)SlashGear)
Organizations involved in the Falcon II project include NASA, Kobe University, Chiba University of Technology, Occupational and Environmental Health University, Kochi University, Aichi Dongfeng University, Huijin University, Tokyo University of Science, etc.
Photographs taken by the optical navigation wide-angle camera (ONC-W1) aboard Falcon II show SCI images after leaving the aircraft and before hitting an asteroid. JAXA said that at this time the "shells" were about 500 meters above the asteroid Ryugu.
Video of Ground Impact Exercise（Via)
In addition, for decades, NASA has been trying to track asteroids that pose a major threat to Earth. In a 2007 report to the U.S. Congress, NASA recommended using nuclear bombs to deflect or destroy NEOs.
However, constrained by the "provisions on the exploration and use of outer space" of various countries, the use of nuclear devices for NEOs must be coordinated internationally first. In March 2013, NASA revealed that its budget for the asteroid project was seriously inadequate.
Fast forward to March 2018, NASA announced plans to track and monitor asteroids such as Bennu, and launched the development of HAMMER, a nuclear power plant that can change the orbit of asteroids.
CG Animation - Falcon II launches its second bombardment of asteroid Rugyu（Via)
In December 2018, NASA dispatched an OSIRIS-REx spacecraft to Bennu in the hope of launching a two-year close-range study of the object. But as far as we know, it does not include blasting test items.
Interested friends can use NASA's browserNEO DeflectionApplication, experience the parameters needed to track NEOs. Meanwhile, Russia has proposed a nuclear-explosive asteroid program called NEOShield.