Tsutomu Seki

+ Minor planets discovered: 225 see is a Japanese amateur astronomer and discoverer of minor planets and comets, born in Kōchi, Japan.

Career

Tsutomu Seki is the Director of the Geisei Observatory in Kōchi, and in charge of the Comet Section of the Oriental Astronomical Association. Between 1961 and 1970, he had visually discovered six comets, including C/1965 S1 (Ikeya-Seki), the well known great comet of 1965.

He has also discovered a large number of asteroids such as 13553 Masaakikoyama and 5209 Oloosson, a near-Earth Amor asteroid and a Jupiter trojan, respectively. Many of his discoveries are named after famous sites in Kōchi, such as Harimaya-bashi, Ryōma (after Sakamoto Ryōma), Katsurahama beach, and Kagami-gawa.

Awards and honors

Asteroid 3426 Seki, discovered by Karl Reinmuth at the Heidelberg Observatory in 1932, was named in his honor. The official naming citation was published by the Minor Planet Center on 16 December 1986 ().

List of discovered minor planets

2396 Kochi 9 February 1981 2571 Geisei 23 October 1981 2582 Harimaya-Bashi 26 September 1981 2621 Goto 9 February 1981 2835 Ryoma 20 November 1982 2880 Nihondaira 8 February 1983 2961 Katsurahama 7 December 1982 3150 Tosa 11 February 1983 3182 Shimanto 27 November 1984 3262 Miune 28 November 1983 3431 Nakano 24 August 1984 3785 Kitami 30 November 1986 3822 Segovia 21 February 1988 3851 Alhambra 30 October 1986 3914 Kotogahama 16 September 1987 3935 Toatenmongakkai 14 August 1987 4039 Souseki 17 September 1987 4095 Ishizuchisan 16 September 1987 4097 Tsurugisan 18 November 1987 4101 Ruikou 8 February 1988 4223 Shikoku 7 May 1988 4256 Kagamigawa 3 October 1986 4290 Heisei 30 October 1989 4399 Ashizuri 21 October 1984 4411 Kochibunkyo 3 January 1990 4439 Muroto 2 November 1984 4441 Toshie 26 January 1985 4496 Kamimachi 9 December 1988 4498 Shinkoyama 5 January 1989 4505 Okamura 20 February 1990 4578 Kurashiki 7 December 1988 4606 Saheki 27 October 1987 4639 Minox 5 March 1989 4670 Yoshinogawa 19 December 1987 4675 Ohboke 19 September 1990 4841 Manjiro 28 October 1989 4865 Sor 18 October 1988 5058 Tarrega 28 July 1987 5113 Kohno 19 January 1988 5124 Muraoka 4 February 1989 5141 Tachibana 16 December 1990 5179 Takeshima 1 March 1989 5209 Oloosson 13 February 1989 5815 Shinsengumi 3 January 1989 5823 Oryo 20 December 1989 5824 Inagaki 24 December 1989 5862 Sakanoue 13 January 1983 5915 Yoshihiro 9 March 1991 5962 Shikokutenkyo 18 April 1990 5966 Tomeko 15 November 1990 5969 Ryuichiro 17 March 1991 6088 Hoshigakubo 18 October 1988 6237 Chikushi 4 February 1989 6244 Okamoto 20 August 1990 6302 Tengukogen 2 February 1989 6399 Harada 3 April 1991 6449 Kudara 7 February 1991 6458 Nouda 2 October 1992 6497 Yamasaki 27 October 1992 6514 Torahiko 25 November 1987 6606 Makino 16 October 1990 6660 Matsumoto 16 January 1993 6699 Igaueno 19 December 1987 6720 Gifu 11 November 1990 6925 Susumu 24 October 1993 6965 Niyodogawa 11 November 1990 6971 Omogokei 8 February 1992 7017 Uradowan 1 February 1992 7094 Godaisan 4 September 1992 7125 Eitarodate 7 February 1991 7235 Hitsuzan 30 October 1986 7274 Washioyama 21 March 1982 7287 Yokokurayama 10 November 1990 7289 Kamegamori 5 May 1991 7410 Kawazoe 20 August 1990 7415 Susumuimoto 14 November 1990 7463 Oukawamine 20 September 1985 7594 Shotaro 19 January 1993 7650 Kaname 16 October 1990 7693 Hoshitakuhai 20 November 1982 8083 Mayeda 1 November 1988 8163 Ishizaki 27 October 1990 8234 Nobeoka 3 November 1997 8367 Bokusui 23 October 1990 8375 Kenzokohno 12 January 1992 8387 Fujimori 19 February 1993 8428 Okiko 3 November 1997 8485 Satoru 29 March 1989 8492 Kikuoka 21 January 1990 8732 Champion 8 December 1996 8877 Rentaro 19 January 1993 8957 Koujounotsuki 22 March 1998 9032 Tanakami 23 November 1989 9062 Ohnishi 27 November 1992 9063 Washi 17 December 1992 9196 Sukagawa 27 November 1992 9198 Sasagamine 25 January 1993 9323 Hirohisasato 11 February 1989 9409 Kanpuzan 25 January 1995 9745 Shinkenwada 2 November 1988 9751 Kadota 20 August 1990 9756 Ezaki 12 February 1991 9852 Gora 24 December 1990 9870 Maehata 24 February 1992 9964 Hideyonoguchi 13 February 1992 10078 Stanthorpe 30 October 1989 10091 Bandaisan 11 November 1990 10094 Eijikato 20 February 1991 10167 Yoshiwatiso 31 January 1995 10300 Tanakadate 6 March 1989 10321 Rampo 26 October 1990 10547 Yosakoi 2 May 1992 10791 Uson 8 February 1992 10803 Caléyo 21 October 1992 10829 Matsuobasho 22 October 1993 11288 Okunohosomichi 10 December 1990 11294 Kazu 4 February 1992 11296 Denzen 24 May 1992 11304 Cowra 19 February 1993 11321 Tosimatumoto 21 February 1995 11361 Orbinskij 28 February 1998 11516 Arthurpage 6 March 1991 11878 Hanamiyama 18 April 1990 11925 Usubae 23 December 1992 11927 Mount Kent 16 January 1993 12084 Unno 22 March 1998 12277 Tajimasatonokai 17 November 1990 12335 Tatsukushi 21 November 1992 12690 Kochimiraikagaku 5 November 1988 12706 Tanezaki 15 October 1990 12749 Odokaigan 2 February 1993 13015 Noradokei 14 December 1987 13529 Yokaboshi 1 September 1991 13553 Masaakikoyama 2 May 1992 13569 Oshu 4 March 1993 13918 Tsukinada 24 August 1984 13933 Charleville 2 November 1988 13978 Hiwasa 4 May 1992 13989 Murikabushi 16 January 1993 14012 Amedee 6 December 1993 14880 Moa 7 February 1991 15238 Hisaohori 2 February 1989 15252 Yoshiken 20 July 1990 15723 Girraween 20 September 1990 15739 Matsukuma 9 March 1991 16503 Ayato 15 October 1990 16602 Anabuki 17 March 1993 17461 Shigosenger 20 October 1990 17465 Inawashiroko 11 November 1990 17508 Takumadan 3 May 1992 17509 Ikumadan 4 May 1992 18365 Shimomoto 17 November 1990 18400 Muramatsushigeru 25 November 1992 18609 Shinobuyama 30 January 1998 18644 Arashiyama 2 March 1998 19156 Heco 20 September 1990 19161 Sakawa 15 October 1990 19197 Akasaki 6 March 1992 19210 Higayoshihiro 25 December 1992 20040 Tatsuyamatsuyama 21 November 1992 20102 Takasago 31 January 1995 21014 Daishi 13 October 1988 21016 Miyazawaseiroku 2 November 1988 21022 Ike 2 February 1989 21089 Mochizuki 8 February 1992 21126 Katsuyoshi 19 January 1993 21166 Nobuyukishouji 6 December 1993 21282 Shimizuyuka 14 October 1996 23468 Kannabe 20 September 1990 23478 Chikumagawa 21 January 1991 23504 Haneda 7 March 1992 23587 Abukumado 2 October 1995 24889 Tamurahosinomura 11 December 1996 26092 Norikonoriyuki 16 September 1987 26097 Kamishi 6 November 1988 26123 Hiroshiyoshida 29 July 1992 26127 Otakasakajyo 19 January 1993 26151 Irinokaigan 2 October 1994 26837 Yoshitakaokazaki 7 September 1991 27716 Nobuyuki 13 February 1989 27739 Kimihiro 17 October 1990 27740 Obatomoyuki 20 October 1990 27790 Urashimataro 13 February 1993 29157 Higashinihon 11 March 1989 29186 Lake Tekapo 26 October 1990 29199 Himeji 17 March 1991 29249 Hiraizumi 26 September 1992 29252 Konjikido 25 January 1993 29337 Hakurojo 6 January 1995 30838 Hitomiyamasaki 7 February 1991 30879 Hiroshikanai 25 May 1992 30888 Okitsumisaki 19 January 1993 32858 Kitakamigawa 25 January 1993 35076 Yataro 21 January 1990 35093 Akicity 14 March 1991 37729 Akiratakao 14 October 1996 39558 Kishine 24 May 1992 39566 Carllewis 26 September 1992 39712 Ehimedaigaku 14 October 1996 39809 Fukuchan 30 November 1997 42566 Ryutaro 3 December 1996 11 November 1990 43794 Yabetakemoto 19 December 1990 7 September 1991 43857 Tanijinzan 15 November 1993 46580 Ryouichiirie 2 April 1992 46592 Marinawatanabe 16 December 1992 46595 Kita-Kyushu 29 December 1992 46596 Tobata 16 January 1993 48482 Oruki 5 February 1992 48495 Ryugado 16 January 1993 52285 Kakurinji 30 July 1990 52455 Masamika 6 January 1995 58164 Reiwanohoshi 20 November 1989 58184 Masayukiyamamoto 7 September 1991 58185 Rokkosan 7 September 1991 65716 Ohkinohama 25 January 1993 65894 Echizenmisaki 30 January 1998 79130 Bandanomori 26 October 1990 79149 Kajigamori 27 October 1992 79152 Abukumagawa 17 March 1993 90713 Chajnantor 11 November 1990 120462 Amanohashidate 26 October 1990 237276 Nakama 2 December 2008 3 September 2010

Tsutomu Seki

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