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Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target
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.ORCID iD: 0000-0002-3291-4056
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.ORCID iD: 0000-0002-7332-2479
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology. Department of Physics, University of Helsinki, P.O. Box 64, FI-00014, Finland.ORCID iD: 0000-0002-5624-1888
Nayoro Observatory, 157-1 Nisshin, Nayoro, Hokkaido, 096-0066, Japan.ORCID iD: 0000-0001-9067-7653
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2023 (English)In: Monthly Notices of the Royal Astronomical Society: Letters, ISSN 1745-3925, Vol. 525, no 1, p. L17-L21Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Oxford University Press, 2023. Vol. 525, no 1, p. L17-L21
Keywords [en]
minor planets, asteroids: individual: (98943) 2001 CC21, techniques: polarimetric, techniques: spectroscopic
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Onboard Space Systems
Identifiers
URN: urn:nbn:se:ltu:diva-99304DOI: 10.1093/mnrasl/slad073ISI: 001055187100004Scopus ID: 2-s2.0-85165416016OAI: oai:DiVA.org:ltu-99304DiVA, id: diva2:1786499
Note

Validerad;2023;Nivå 1;2023-08-09 (hanlid);

Funder: National Research Foundation of Korea, NRF (2023R1A2C1006180); Hypervelocity Impact Facility; Japan Aerospace Exploration Agency, JAXA; Institute of Space and Astronautical Science

Available from: 2023-08-09 Created: 2023-08-09 Last updated: 2024-11-20Bibliographically approved

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Granvik, Mikael

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Geem, JooyeonIshiguro, MasateruGranvik, MikaelNaito, HiroyukiAkitaya, HiroshiSekiguchi, TomohikoHasegawa, SunaoKuroda, DaisukeBach, Yoonsoo PJin, SunhoImazawa, RyoKawabata, Koji STakagi, SeikoYoshikawa, MakotoDjupvik, Anlaug AThomsen, Jeppe SinkbaekGray, Zuri
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