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Small Carry-on Impactor (SCI)

NSSDCA ID: 2014-076A-05

Mission Name: Hayabusa2


The Small Carry-on Impactor (SCI) is a deployable instrument for creating an artificial crater on asteroid 162173 Ryugu by impacting a malleable, 2-kg, copper liner. Copper is used because the element can be easily separated from the asteroid sample. By ignition of an explosive, the liner will be ejected at a high speed, about 2 km/s, and while chaging its shape from a shallow dish to a bullet before impacting the surface. This experiment enables access to subsurface materials that have not been affected by space weathering.

SCI has no attitude and position control. It will be maneuvered into position and aimed at the target point on the asteroid before release from the Hayabusa2 spacecraft.

Alternate Names

  • Hayabusa2/SmallCarryonImpactor(SCI)
  • SCI
  • urn:jaxa:darts:context:instrument:hyb2.sci

Facts in Brief

Mass: 14 kg

Funding Agency

  • Japan Aerospace Exploration Agency (Japan)


  • Planetary Science: Small Bodies

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail

Selected References

  • Saiki, T., et al., The Small Carry-on Impactor (SCI) and the Hayabusa2 Impact Experiment, Space Sci. Rev., 208, No. 1-4, 165-186, doi:10.1007/s11214-016-0297-5, Jul. 2017.
  • Arakawa, M., et al., Scientific Objectives of Small Carry-on Impactor (SCI) and Deployable Camera 3 Digital (DCAM3-D): Observation of an Ejecta Curtain and a Crater Formed on the Surface of Ryugu by an Artificial High-Velocity Impact, Space Sci. Rev., 208, No. 1-4, 187-212, doi:10.1007/s11214-016-0290-z, Jul. 2017.
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