Asteroid Explorer Hayabusa2

Under Development

Project Topics

November 20, 2013 Updated

Hayabusa2 Small Carry-on Impactor undergoes test

Hayabusa2’s Small Carry-on Impactor (SCI) underwent a test in October, 2013.
The SCI is a device to create an artificial crater of the asteroid 1999JU3, which the Hayabusa 2 will travel toward. By making and observing an artificial crater, we can acquire data not only about the surface but also about the inside of the asteroid. In addition, by sampling near the crater, we can collect inside samples of the asteroid.
Hayabusa2 applies a method to throw a metal projectile against the asteroid with high speed to create an artificial crater. Through the test this time, we confirmed the accelerating part of the projectile while aiming to verify if its speed, configuration, and thrown direction precision met the design when the pyrotechnics, which were comparable to those of actual ones for the flight, were ignited to set off the projectile.
The test results were very impressive as the speed and configuration were almost as designed, and the direction precision was also good as the SCI precisely hit a target that was 100 meters away. We were able to successfully complete the performance confirmation test of the SCI pyrotechnic part.

Hayabusa2 SCI test [JAXA Digital Archives]



Hayabusa2 to clarify the origin and evolution of the solar system as well as life matter

(Courtesy of Akihiro Ikeshita)

Asteroid Explorer “Hayabusa2” is a successor of “Hayabusa” (MUSES-C), which revealed several new technologies and returned to Earth in June 2010.
While establishing a new navigation method using ion engines, Hayabusa brought back samples from the asteroid “Itokawa” to help elucidate the origin of the solar system. Hayabusa2 will target a C-type asteroid “1999 JU3” to study the origin and evolution of the solar system as well as materials for life by leveraging the experience acquired from the Hayabusa mission.
To learn more about the origin and evolution of the solar system, it is important to investigate typical types of asteroids, namely S-, C-, and D-type asteroids. A C-type asteroid, which is a target of Hayabusa2, is a more primordial body than Itokawa, which is an S-type asteroid, and is considered to contain more organic or hydrated minerals -- although both S- and C- types have lithologic characteristics. Minerals and seawater which form the Earth as well as materials for life are believed to be strongly connected in the primitive solar nebula in the early solar system, thus we expect to clarify the origin of life by analyzing samples acquired from a primordial celestial body such as a C-type asteroid to study organic matter and water in the solar system and how they coexist while affecting each other.

Establishing deep space exploration technology and new challenges

Hayabusa2 will utilize new technology while further confirming the deep space round-trip exploration technology by inheriting and improving the already verified knowhow established by Hayabusa to construct the basis for future deep-space exploration.
The configuration of Hayabusa2 is basically the same as that of Hayabusa, but we will modify some parts by introducing novel technologies that evolved after the Hayabusa era. For example, the antenna for Hayabusa was in a parabolic shape, but the one for Hayabusa2 will be flattened. Also, a new function, “collision device”, is considered to be onboard to create a crater artificially. An artificial crater that can be created by the device is expected to be a small one with a few meters in diameter, but still, by acquiring samples from the surface that is exposed by a collision, we can get fresh samples that are less weathered by the space environment or heat.
Hayabusa2 is scheduled for launch in FY2014. It should arrive at the C-type asteroid in mid 2018, staying around there for one and half years before leaving the asteroid at the end of 2019 and returning to Earth around the end of 2020.