Spectral type and geometric albedo of (98943) 2001 CC21, the <i>Hayabusa2#</i> mission target-Reference-Cited by-同舟云学术

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

Published:2023-06-12 Issue:1 Volume:525 Page:L17-L21
ISSN:1745-3925
Container-title:Monthly Notices of the Royal Astronomical Society: Letters
language:en
Short-container-title:

Author:

Geem Jooyeon¹²^ORCID,Ishiguro Masateru¹²^ORCID,Granvik Mikael³⁴^ORCID,Naito Hiroyuki⁵^ORCID,Akitaya Hiroshi⁶⁷^ORCID,Sekiguchi Tomohiko⁸^ORCID,Hasegawa Sunao⁹^ORCID,Kuroda Daisuke¹⁰^ORCID,Oono Tatsuharu¹¹,Bach Yoonsoo P¹²^ORCID,Jin Sunho¹²^ORCID,Imazawa Ryo¹²^ORCID,Kawabata Koji S⁷¹²^ORCID,Takagi Seiko¹³^ORCID,Yoshikawa Makoto⁹^ORCID,Djupvik Anlaug A¹⁴¹⁵^ORCID,Gadeberg Julie Thiim¹⁴,Pursimo Tapio¹⁴¹⁵,Pedros Oliver Durfeldt¹⁴¹⁶,Thomsen Jeppe Sinkbaek¹⁴¹⁵¹⁷^ORCID,Gray Zuri¹⁴¹⁸¹⁹^ORCID

Affiliation:

1. Department of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

2. SNU Astronomy Research Center, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

3. Department of Physics, P.O. Box 64, FI-00014 University of Helsinki , Finland

4. Asteroid Engineering Laboratory, Luleå University of Technology , Box 848, SE-98128 Kiruna, Sweden

5. Nayoro Observatory , 157-1 Nisshin, Nayoro, Hokkaido 096-0066, Japan

6. Planetary Exploration Research Center, Chiba Institute of Technology , 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan

7. Hiroshima Astrophysical Science Center, Hiroshima University , Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima 739-8526, Japan

8. Asahikawa Campus, Hokkaido University of Education , 9 Hokumon, Asahikawa, Hokkaido 070-8621, Japan

9. Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA) , Sagamihara, Kanagawa 252-5210, Japan

10. Bisei Spaceguard Center, Japan Spaceguard Association , 1716-3 Okura, Bisei-cho, Ibara, Okayama 714-1411, Japan

11. Department of Cosmosciences, Graduate School of Science, Hokkaido University , Kita-ku, Sapporo, Hokkaido 060-0810, Japan

12. Department of Physics, Graduate School of Advanced Science and Engineering, Hiroshima University , Kagamiyama, 1-3-1 Higashi-Hiroshima, Hiroshima 739-8526, Japan

13. Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University , Kita-ku, Sapporo, Hokkaido 060-0810, Japan

14. Nordic Optical Telescope , Rambla José Ana Fernández Pérez 7, ES-38711 Breña Baja, Spain

15. Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, DK-8000 Aarhus C, Denmark

16. DTU Space, National Space Institute, Technical University of Denmark , Elektrovej 328, DK-2800 Kgs. Lyngby, Denmark

17. Dipartimento di Fisica e Astronomia, Università di Bologna , Via Zamboni, 33-40126 Bologna, Italia

18. Armagh Observatory and Planetarium , College Hill, Armagh BT61 9DG, UK

19. Mullard Space Science Laboratory, Department of Space & Climate Physics, University College London , Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK

Abstract

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.

Funder

National Research Foundation of Korea

MEST

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/mnrasl/advance-article-pdf/doi/10.1093/mnrasl/slad073/50574608/slad073.pdf

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