Multi-chord observation of stellar occultation by the near-Earth asteroid (3200) Phaethon on 2021 October 3 (UTC) with very high accuracy-Reference-Cited by-同舟云学术

Multi-chord observation of stellar occultation by the near-Earth asteroid (3200) Phaethon on 2021 October 3 (UTC) with very high accuracy

Published:2022-12-20 Issue:1 Volume:75 Page:153-168
ISSN:0004-6264
Container-title:Publications of the Astronomical Society of Japan
language:en
Short-container-title:

Author:

Yoshida Fumi¹²^ORCID,Hayamizu Tsutomu³,Miyashita Kazuhisa⁴⁵,Watanabe Hiroyuki⁵⁶,Yamamura Hidehito⁷,Akitaya Hiroshi²^ORCID,Asai Akira⁵,Fujiwara Yasunori⁵⁸,Goto Tateki⁹,Hashimoto George L¹⁰^ORCID,Hatanaka Akitoshi¹¹,Horaguchi Toshihiro¹²^ORCID,Ida Miyoshi⁵,Imamura Kazuyoshi¹³,Isobe Ken⁵⁸,Ishiguro Masateru¹⁴^ORCID,Kaizuka Noboru¹⁵,Kasebe Hisashi⁵⁸,Kawasaki Yohei¹⁶,Kim Taewoo¹⁷,Kitazaki Katsuhiko⁵¹⁸,Manago Norihiro⁵,Matsumura Masafumi¹⁹^ORCID,Matsushita Hiroshi²⁰,Matsuura Shuji²¹^ORCID,Nakamura Takahiro²²,Nagata Toshihiro⁷,Noda Hirotomo²³^ORCID,Ogawa Masaaki²⁴,Ohshima Osamu²⁵,Owada Minoru⁵,Saitou Kazuyuki²⁶,Tsumura Mitsunori²⁷,Ueyama Yoshihiro²⁴,Watanabe Hayato⁵,Yamamoto Masa-yuki²⁸^ORCID,Yoshihara Hideki⁵,Fujiwara Takao¹⁰,Haraguchi Miyu¹⁰,Hayashi Hironori²¹,Hitotsuda Tomoya²⁹,Horikawa Toshihiro⁹,Ishida Kai²¹,Ito Tadashi⁸,Jin Sunho¹⁴,Kang Wonseok¹⁷,Katayama Toshihiko⁹,Kawabata Koji S³⁰^ORCID,Kawasaki Ryosuke³¹,Kim Kihyeon¹⁴,Kita Masayuki⁹,Kitazaki Naoko¹⁸,Kurisu Hiroya¹¹,Matsushima Makoto³²,Matsumi Chika²¹,Mihari Ayami¹³,Naka Masaru¹¹,Nakaoka Tatsuya³⁰,Nishihama Reiko³²,Nishiyama Yukio³³,Nukui Sadao²⁹,Oba Masahiko³⁴,Okamoto Takaya²,Omori Yujiro³⁵,Seo Jinguk¹⁴,Shirakawa Hiroki⁹,Sugino Tomoshi²⁰,Tani Yuki²⁸,Takagaki Kazuhiko²⁹,Ueda Yukikazu⁸,Urakawa Seitaro³⁶^ORCID,Watanabe Masanari³⁷,Yamashita Kouhei³³,Yamashita Misato¹⁰,Sato Isao⁶,Murayama Shosaku⁹,Arai Tomoko²^ORCID,Herald David⁶^ORCID,Higuchi Arika³⁸^ORCID

Affiliation:

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

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

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

4. Japan regional Coordinator for Lunar Occultation observation (JCLO) , Japan

5. Japan Occultation Information Network (JOIN) , Japan

6. International Occultation Timing Association (IOTA) , PO Box 20313, Fountain Hills, AZ 85269-0313 , USA

7. NPO KWASAN ASTRO NETWORK , c/o Kwasan Observatory, 17-1 Kitakazan-ohmine-cho, Yamashina-ku, Kyoto, Kyoto 607-8471 Japan

8. Japan Astronomical Club , 2-16-8 Mikunihonmachi, Yodogawa, Osaka, Osaka 532-0005 , Japan

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

10. Okayama University , 3-1-1 Tsushimanaka, Kita, Okayama 700-8530 , Japan

11. Kumano Astronomical Club , Kumano, Mie , Japan

12. National Museum of Nature and Science , 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005 , Japan

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

14. Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826 , South Korea

15. ASCOMI , Kuwana, Mie 511-0821 , Japan

16. Astronomical Club FUKUYAMA , Fukuyama, Hiroshima , Japan

17. National Youth Space Center , Jeollanam, Deokheung yangjjokgil 200, Goheung 59567 , South Korea

18. Nakano Stargazers Club Japan

19. Faculty of Education and Center for Educational Development and Support, Kagawa University , Saiwai-cho 1-1, Takamatsu, Kagawa 760-8522 , Japan

20. Shima , Mie 517-0604 , Japan

21. Kwansei Gakuin University , 1 Uegahara, Gakuen, Sanda, Hyogo 669-1330 , Japan

22. Kitakyusyu Sirius-kai , Kitakyusyu, Fukuoka 803-0864 , Japan

23. National Astronomical Observatory of Japan, National Astronomical Observatory of Japan , 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861 , Japan

24. Nippon Meteor Society , Japan

25. Okayama University of Science , 1-1 Ridaicho, Kita-ku, Okayama-shi, Okayama 700-0005 , Japan

26. Nichihara Astronomical Observatory, Makurase, Tsuwano , Kanoashi, Shimane 699-5207 , Japan

27. Wakayama , Wakayama 640-0351 , Japan

28. Kochi University of Technology , 185 Miyanokuchi, Tosayamada, Kami City, Kochi 782-8502 , Japan

29. Aridagawa Town Astronomy Club , Aridagawa-cho, Arida-gun, Wakayama , Japan

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

31. Kougominami, Nishiku, Hiroshima , Hirosima 733-0823 , Japan

32. Kinokawa Astronomy Club , Kinokawa, Wakayama , Japan

33. Astronomical Society of Shikoku , Takamatsu, Kagawa 761-0321 , Japan

34. Mitsubishi Heavy Industries , Kure, Hiroshima 737-8508 , Japan

35. Fujii Gakuen , 1-3-1 Shinhama, Marugame, Kagawa 763-0063 , Japan

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

37. Nagoya University, Furo-cho, Chikusa-ku , Nagoya, Aichi 464-8601 , Japan

38. Kyoto Sangyo University , Motoyama, Kamigamo, Kita-ku, Kyoto, Kyoto 603-8555 , Japan

Abstract

Abstract We observed a stellar occultation by (3200) Phaethon, which occurred in western Japan on 2021 October 3 (UTC). This observation was requested by the DESTINY+ mission team, which plans to conduct a flyby of asteroid Phaethon in 2028. Overall, this research effort contributes towards a large-scale observation campaign with a total of 72 observers observing from western Japan to southern Korea. 36 stations were established, and stellar occultation by the asteroid Phaethon was detected in 18 of them. This is the first time that this many multiple chord observations have been made for such a small asteroid (it has a diameter of 5–6 km). Observational reductions show that the apparent cross-section of Phaethon at the time of the occultation could be approximated using an ellipse with a major diameter of 6.12 ± 0.07 km and a minor diameter of 4.14 ± 0.07 km, and a position angle of 117.°4 ± 1.°5. As can be seen from the small error bars of the fitted ellipse, we have succeeded in estimating the shape and size of the asteroid with an extremely high degree of accuracy. Our observation results, together with other observations, will be used to create a 3D model of Phaethon and to improve its orbit. The instruments that we used for this observation are commonly used by many amateur astronomers in Japan for occultation observations and are not difficult to obtain. This paper describes the method and results of our observations using a CMOS camera and a GPS module, so that many people can participate in occultation observations in the future.

Funder

Grants-in-Aid for Scientific Research

National Astronomical Observatory of Japan

NRF

MEST

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/pasj/article-pdf/75/1/153/49084478/psac096.pdf

Reference42 articles.

1. REFINED ROTATIONAL PERIOD, POLE SOLUTION, AND SHAPE MODEL FOR (3200) PHAETHON

2. Rotational variation of the linear polarization of the asteroid (3200) Phaethon as evidence for inhomogeneity in its surface properties★

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