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  • Geem, Jooyeon, et al. (author)
  • Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target
  • 2023
  • In: Monthly Notices of the Royal Astronomical Society: Letters. - : Oxford University Press. - 1745-3925 .- 1745-3933. ; 525:1, s. L17-L21
  • Journal article (peer-reviewed)abstract
    • We conducted optical polarimetry and near-infrared spectroscopy of Japan Aerospace Exploration Agency (JAXA)'s Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicate that this asteroid has a polarimetric inversion angle of ∼20°, absorption bands around 0.9 and 1.9 μm, and a geometric albedo of 0.23 ± 0.04. All these features are consistent with those of S types but inconsistent with L types. Based on this evidence, we conclude that JAXA's Hayabusa2# spacecraft will explore an S-type asteroid (more specifically, an L or LL chondrite-like object) with albedo and size (0.44-0.53 km when we assume the absolute magnitude of 18.8) similar to (25143) Itokawa.
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