Hiroki Kosai
Introduction + Minor planets discovered: 93  ''see '' is a Japanese astronomer with the Kiso Observatory. He is best known for helping to popularize astronomy in Japan and for his observations of comets and asteroids, most notably with his co-discovery the comet 1976 XVI. He is credited by the Minor Planet Center (MPC) with the discovery of nearly 100 asteroids.
Awards and honors Asteroid 3370 Kohsai, discovered by Karl Reinmuth at Heidelberg Observatory in 1930, was is named in his honor. The official naming citation was published by the MPC on 14 April 1987 ().
List of discovered minor planets Hiroki Kosai discovered several asteroids, all in collaboration with  Kiichirō Furukawa and  Goro Sasaki: 2271 Kiso  22 October 1976    2330 Ontake  18 February 1977    2470 Agematsu  22 October 1976    2924 Mitake-mura  18 February 1977    2960 Ohtaki  18 February 1977    3111 Misuzu  19 February 1977    3249 Musashino  18 February 1977    3291 Dunlap  14 November 1982    3319 Kibi  12 March 1977    3320 Namba  14 November 1982    '''3391 Sinon'''  18 February 1977    3392 Setouchi  17 December 1979    3607 Naniwa  18 February 1977    3878 Jyoumon  14 November 1982    4072 Yayoi  30 October 1981    4077 Asuka  13 December 1982    4186 Tamashima  18 February 1977    4272 Entsuji  12 March 1977    4526 Konko  22 May 1982    4812 Hakuhou  18 February 1977    4855 Tenpyou  14 November 1982    4890 Shikanosima  14 November 1982    4929 Yamatai  13 December 1982    4963 Kanroku  18 February 1977    5017 Tenchi  18 February 1977    5018 Tenmu  19 February 1977    5082 Nihonsyoki  18 February 1977    5454 Kojiki  12 March 1977    5466 Makibi  30 November 1986    5541 Seimei  22 October 1976    6031 Ryokan  26 January 1982    6218 Mizushima  12 March 1977    6818 Sessyu  11 March 1983    6846 Kansazan  22 October 1976    7104 Manyousyu  18 February 1977    7105 Yousyozan  18 February 1977    7562 Kagiroino-Oka  30 November 1986    7627 Wakenokiyomaro  18 February 1977    7634 Shizutani-Kou  14 November 1982    7991 Kaguyahime  30 October 1981    8133 Takanochoei  18 February 1977    8144 Hiragagennai  14 November 1982    9147 Kourakuen  18 February 1977    9153 Chikurinji  30 October 1981    9293 Kamogata  13 December 1982    9719 Yakage  18 February 1977    10006 Sessai  22 October 1976    10008 Raisanyo  18 February 1977    10009 Hirosetanso  12 March 1977    10453 Banzan  18 February 1977    11254 Konkohekisui  18 February 1977    11255 Fujiiekio  18 February 1977    11442 Seijin-Sanso  22 October 1976    11827 Wasyuzan  14 November 1982    12186 Mitukurigen  12 March 1977    12221 Ogatakoan  14 November 1982    12682 Kawada  14 November 1982    14313 Dodaira  22 October 1976    14314 Tokigawa  18 February 1977    14315 Ogawamachi  12 March 1977    14316 Higashichichibu  12 March 1977    14338 Shibakoukan  14 November 1982    14795 Syoyou  12 March 1977    14820 Aizuyaichi  14 November 1982    14821 Motaeno  14 November 1982    15202 Yamada-Houkoku  12 March 1977    15671 Suzannedébarbat  12 March 1977    15672 Sato-Norio  12 March 1977    16357 Risanpei  22 October 1976    18289 Yokoyamakoichi  22 October 1976    18290 Sumiyoshi  18 February 1977    18291 Wani  18 February 1977    18322 Korokan  14 November 1982    19083 Mizuki  18 February 1977      12 March 1977    19953 Takeo  14 November 1982    19954 Shigeyoshi  14 November 1982    20962 Michizane  12 March 1977    22277 Hirado  14 November 1982    24640 Omiwa  13 December 1982    26794 Yukioniimi  18 February 1977      22 May 1982      14 November 1982    34995 Dainihonshi  18 February 1977    34996 Mitokoumon  18 February 1977      12 March 1977      14 November 1982      14 November 1982    52260 Ureshino  22 May 1982    52261 Izumishikibu  14 November 1982      12 March 1977      12 March 1977      30 November 1986   '''Co-discovery''' made with: K. Furukawa G. Sasaki
See also *
References
External links *  Activities of Asteroid Studies by Amateur Astronomers in Japan*  2008 Great Meeting at Nikon Headquarters