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Kōichi Itagaki (Japanese: 板垣 公一, Hepburn: Itagaki Kōichi, born 12 November 1947) is an amateur astronomer based in Yamagata, the capital city of Yamagata Prefecture in the Tōhoku region of northern Honshu island, Japan. He is responsible for discovering many comets, and over 170 supernovae. [1]
Minor planets discovered: 624 [1] see § List of discovered minor planets Kin Endate ( 円館 金 , Endate Kin , born December 15, 1960) is a Japanese amateur astronomer who has discovered hundreds of asteroids, most of them in collaboration with Kazuro Watanabe , placing him among the most prolific discoverers of minor planets .
Masakatsu Aoki (青木 昌勝, Aoki Masakatsu, born 1957, Toyama Prefecture) is a Japanese amateur astronomer who operates from his private Aoki Astronomical Observatory at Toyama, Toyama Prefecture, Japan. [3] His main interest lies in supernovae of which he has discovered a total of 13, such a SN 1999eu as well as SN 2000db and SN 2000di.
Kazuro Watanabe is credited by the Minor Planet Center with the discovery of 671 minor planets made between 1987 and 2000. [1]Some of his discoveries include (in alphabetical order) the minor planets 4263 Abashiri (Florian asteroid), 4585 Ainonai, 46610 Bésixdouze, 5331 Erimomisaki, 3915 Fukushima, 5474 Gingasen (Vestian binary), 9971 Ishihara, 11949 Kagayayutaka, 5481 Kiuchi, 6498 Ko (slow ...
Japanese amateur astronomer Hideo Nishimura discovered the comet in images he obtained using a 200-mm f/3 telephoto lens mounted on a Canon EOS 6D on 12 August 2023, when the comet was 1.0 AU from the Sun. He also found it in images he exposed the previous night. [1]
Tsuneo Niijima (新島 恒男, Niijima Tsuneo, born 1955) is a Japanese farmer and amateur astronomer. [2]He is a prolific discoverer of minor planets, credited by the Minor Planet Center with the discovery and co-discovery of 32 numbered minor planets between 1986 and 1996. [1]
Tomimaru Okuni (大国 富丸, Ōkuni Tomimaru, born 1931) is a Japanese amateur astronomer and a discoverer of minor planets at the Nanyo Observatory , Yamagata prefecture, Japan. [2] He is a prolific discoverer of asteroids, credited by the Minor Planet Center with a total of 130 discoveries between 1995 and 2000. [1]
Kōyō Kawanishi (川西 浩陽, Kawanishi Kōyō, born January 18, 1959) is a Japanese dentist, amateur astronomer and discoverer of 13 minor planets. [1] [2]He lives in the city of Akō in the Hyōgo Prefecture, Japan, where his private Minami-Oda Observatory is located. [3]