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Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target

Geem, Jooyeon (author)
Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
Ishiguro, Masateru (author)
Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
Granvik, Mikael (author)
Luleå tekniska universitet,Rymdteknik,Department of Physics, University of Helsinki, P.O. Box 64, FI-00014, Finland
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Naito, Hiroyuki (author)
Nayoro Observatory, 157-1 Nisshin, Nayoro, Hokkaido, 096-0066, Japan
Akitaya, Hiroshi (author)
Planetary Exploration Research Center, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba, 275-0016, Japan; Hiroshima Astrophysical Science Center, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
Sekiguchi, Tomohiko (author)
Asahikawa Campus, Hokkaido University of Education, 9 Hokumon, Asahikawa, Hokkaido 070-8621, Japan
Hasegawa, Sunao (author)
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, 252-5210, Japan
Kuroda, Daisuke (author)
Bisei Spaceguard Center, Japan Spaceguard Association, 1716-3 Okura, Bisei-cho, Ibara, Okayama, 714-1411, Japan
Oono, Tatsuharu (author)
Department of Cosmosciences, Graduate School of Science, Hokkaido University, Kita-ku, Sapporo, Hokkaido, 060-0810, Japan
Bach, Yoonsoo P (author)
Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
Jin, Sunho (author)
Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
Imazawa, Ryo (author)
Department of Physics, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama, 1-3-1 Higashi-Hiroshima, Hiroshima, 739-8526, Japan
Kawabata, Koji S (author)
Hiroshima Astrophysical Science Center, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima, 739-8526, Japan; Department of Physics, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama, 1-3-1 Higashi-Hiroshima, Hiroshima, 739-8526, Japan
Takagi, Seiko (author)
Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, Kita-ku, Sapporo, Hokkaido, 060-0810, Japan
Yoshikawa, Makoto (author)
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, 252-5210, Japan
Djupvik, Anlaug A (author)
Nordic Optical Telescope, Rambla José Ana Fernandeź Pereź 7, ES-38711, Brena Baja, Spain; Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000, Aarhus C, Denmark
Gadeberg, Julie Thiim (author)
Nordic Optical Telescope, Rambla José Ana Fernandeź Pereź 7, ES-38711, Brena Baja, Spain
Pursimo, Tapio (author)
Nordic Optical Telescope, Rambla José Ana Fernandeź Pereź 7, ES-38711, Brena Baja, Spain; Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000, Aarhus C, Denmark
Pedros, Oliver Durfeldt (author)
Nordic Optical Telescope, Rambla José Ana Fernandeź Pereź 7, ES-38711, Brena Baja, Spain; DTU Space, National Space Institute, Technical University of Denmark, Elektrovej 328, DK-2800, Kgs. Lyngby, Denmark
Thomsen, Jeppe Sinkbaek (author)
Nordic Optical Telescope, Rambla José Ana Fernandeź Pereź 7, ES-38711, Brena Baja, Spain; Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000, Aarhus C, Denmark; Dipartimento di Fisica e Astronomia, Universita di Bologna, Via Zamboni, 33, 40126, Bologna, Italia
Gray, Zuri (author)
Nordic Optical Telescope, Rambla José Ana Fernandeź Pereź 7, ES-38711, Brena Baja, Spain; Armagh Observatory and Planetarium, College Hill, Armagh, BT61 9DG, UK; Mullard Space Science Laboratory, Department of Space & Climate Physics, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK
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 (creator_code:org_t)
Oxford University Press, 2023
2023
English.
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 Subject headings
Close  
  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

minor planets
asteroids: individual: (98943) 2001 CC21
techniques: polarimetric
techniques: spectroscopic
Onboard Space Systems
Rymdtekniska system

Publication and Content Type

ref (subject category)
art (subject category)

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