Diffraction modelling of a 2023 March 5 stellar occultation by subkilometer-sized asteroid (98943) 2001 CC21-Reference-Cited by-同舟云学术

Diffraction modelling of a 2023 March 5 stellar occultation by subkilometer-sized asteroid (98943) 2001 CC21

Published:2024-07-23 Issue: Volume: Page:
ISSN:0004-6264
Container-title:Publications of the Astronomical Society of Japan
language:en
Short-container-title:

Author:

Arimatsu Ko¹^ORCID,Yoshida Fumi²³^ORCID,Hayamizu Tsutomu⁴,Ida Miyoshi⁵,Hashimoto George L⁶^ORCID,Abe Takashi⁷,Akitaya Hiroshi⁸³⁹^ORCID,Aratani Akari¹⁰,Fukuda Hidekazu¹¹,Fujita Yasuhide¹²,Fujiwara Takao⁶,Horikawa Toshihiro⁷,Iihoshi Tamio¹³,Imamura Kazuyoshi¹⁴,Imazawa Ryo¹⁵^ORCID,Kasebe Hisashi⁵,Kawasaki Ryosuke¹⁶,Kishimoto Hiroshi⁵,Mishima Kazuhisa¹⁷,Miyachi Machiko¹⁸,Mizutani Masanori¹⁹,Nakajima Maya⁶,Nakatani Hiroyoshi¹³,Okamura Kazuhiko⁷,Okanobu Misaki⁶,Okuda Masataka²⁰,Suzuki Yuji²¹,Tatsumi Naoto²²,Uno Masafumi⁷,Yamamura Hidehito²³,Yasue Mikoto²⁴¹⁰,Yoshihara Hideki⁵,Hirabayashi Masatoshi²⁵^ORCID,Yoshikawa Makoto²⁶^ORCID

Affiliation:

1. The Hakubi Center/Astronomical Observatory, Graduate School of Science, Kyoto University Kitashirakawa-oiwake-cho , Sakyo-ku, Kyoto, Kyoto 606-8502, Japan

2. University of Occupational and Environmental Health, Japan , 1-1 Iseigaoka, Yahatanishi, Kitakyusyu, Fukuoka 807-8555, Japan

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

4. Saga Hoshizora Astronomy Center , 328 Nishiyoka-cho, Oaza Takataro, Saga, Saga 840-0036, Japan

5. Japan Occultation Information Network (JOIN) , Japan

6. Department of Earth Sciences, Okayama University , 3-1-1 Tsushimanaka, Kita, Okayama, Okayama 700-8530, Japan

7. Museum of Astronomical Telescopes , 30-1 Sukemitsu-Higashi, Tawa, Sanuki, Kagawa 769-2306, Japan

8. Astronomy Research Center, Chiba Institute of Technology , 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan

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

10. GROUND Geoscience club, Hokkaido University , Kita-10 Nishi-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan

11. Kakogawa Outdoor Education Center , 715-5 Amagahara, Higashikanki-cho, Kakogawa, Hyogo 675-0058, Japan

12. Kuma Kogen Astronomical Observatory , 488 Shimohatanokawa Otsu, Kumakogen, Kamiukena-gun, Ehime, 791-1212, Japan

13. Astronomical Club of Fukuyama, Fukuyama , Hiroshima, Japan

14. Anan Science Center , 8-1 Nagakawa Kamifukui Minami-Kawabuchi, Anan, Tokushima 779-1243, Japan

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

16. Kougominami , Nishi-ku, Hiroshima, Hiroshima 733-0823, Japan

17. Life Park Kurashiki Science Center , 940 Koshinden, Fukudacho, Kurashiki, Okayama 712-8046, Japan

18. Japanese Association of Accounting and Astronomy , 1-1-1 Nishimachi, Fukuyama, Hiroshima 720-0067, Japan

19. Hattoji Star Watching Group , 1393 Kagami, Yoshinaga-cho, Bizen, Okayama 709-0301, Japan

20. Kaichi , Yao, Osaka 581-0881, Japan

21. Ehime Prefecture Science Museum , 2133-2 Ojoin, Niihama, Ehime 792-0060, Japan

22. Ryuten Astronomical Observatory , 2978-3 Nakaseijitsu, Akaiwa, Okayama 701-2437, Japan

23. NPO KWASAN ASTRO NETWORK , c/o Kwasan Observatory, 17 Kitakazan-ohmine-cho, Yamashina-ku, Kyoto, Kyoto 607-8471 Japan

24. Hokkaido University Astronomy Club, Hokkaido University , Kita-10 Nishi-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan

25. Daniel Guggenheim School of Aerospace Engineering, Georgia Institute of Technology , North Avenue, Atlanta, GA 30332, USA

26. Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA) , 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan

Abstract

Abstract We present an analysis of a stellar occultation event caused by a near-Earth asteroid (98943) 2001 CC21, an upcoming flyby target in the Hayabusa2 extended mission, on 2023 March 5. To determine the asteroid’s shape from diffraction-affected light curves accurately, we developed a novel data-reduction technique named the Diffracted Occultation’s United Simulator for Highly Informative Transient Explorations (DOUSHITE). Using DOUSHITE-generated synthetic models, we derived constraints on (98943) 2001 CC21’s shadow shape from the single-chord occultation data. Our results suggest a significant elongation of the shadow with an axis ratio of $b/a = 0.37\pm 0.09$. This shape could be crucial for planning Hayabusa2’s high-speed flyby to optimise the limited imaging opportunities.

Funder

Japan Society for the Promotion of Science

Publisher

Oxford University Press (OUP)

Link

https://academic.oup.com/pasj/advance-article-pdf/doi/10.1093/pasj/psae060/58619798/psae060.pdf

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2. New Constraint on the Atmosphere of (50000) Quaoar from a Stellar Occultation

3. A kilometre-sized Kuiper belt object discovered by stellar occultation using amateur telescopes

4. Evidence for a rapid decrease of Pluto’s atmospheric pressure revealed by a stellar occultation in 2019