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Hayabusa2

JAXA's asteroid explorer, which brought samples of Ryugu to Earth in 2020. On an extended mission, it flew past asteroid Torifune in July 2026 and is due at the tiny 1998 KY26 in July 2031.

JAXA·1998 KY26·Launched 3 December 2014·Cruise
—days —h —m —s in space
Distance from Earth
85.16 M km
0.569246 AU
Distance from Sun
158.85 M km
1.061834 AU
Speed
95,399 km/h
26.5 km/s
Signal Delay
4.7 min
one way

Asteroid Sample Return Pioneer

Hayabusa2 reached asteroid Ryugu on 27 June 2018 and touched down twice in 2019, the second time near an artificial crater it had made by firing a copper projectile into the surface, collecting the first material from below an asteroid's surface. Its capsule brought 5.4 grams of samples to Australia in December 2020, and studies have found water-bearing minerals and amino acids.

An Extended Mission

Rather than retire a healthy spacecraft, JAXA sent Hayabusa2 on to two more asteroids. On 5 July 2026 it flew past Torifune at about 5 km/s and measured its distance by laser during the pass, a first for such a fast flyby. Its final target, 1998 KY26, is due in July 2031: measurements in 2025 showed it is only about 11 metres across and spins once every 5.35 minutes, which makes it a hard but valuable test for future planetary defence.

Mission Timeline

3 December 2014
Launch on an H-IIA from Tanegashima
27 June 2018
Arrives at asteroid Ryugu
22 February 2019
First touchdown and sample collection
5 April 2019
Fires an impactor to make an artificial crater
11 July 2019
Second touchdown, near the new crater
6 December 2020
Sample capsule lands in Australia
5 July 2026
Flies past asteroid Torifune at about 5 km/s

Key Data

MissionHayabusa2
AgencyJAXA
StatusCruise
Target1998 KY26
AsteroidRyugu
Launch date3 December 2014

Coming Up

July 2031
Arrival at asteroid 1998 KY26

Questions people ask

Hayabusa2 is 158.8 million km from the Sun and 85.2 million km from Earth, on its long cruise to the tiny asteroid 1998 KY26. Signals take 4 min 44 s to reach it.
It is due to arrive in July 2031. Measurements in 2025 showed the asteroid is only about 11 metres across and spins once every 5.35 minutes, which will make a close approach harder than first planned.
About 5.4 grams of rock and dust, which landed in Australia in December 2020, including the first material ever collected from below an asteroid's surface. Studies have found water-bearing minerals and amino acids in the samples.

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