Tsutomu Seki
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| Asteroids discovered: 223 | |
|---|---|
| 2396 Kochi | February 9, 1981 |
| 2571 Geisei | October 23, 1981 |
| 2582 Harimaya-Bashi | September 26, 1981 |
| 2621 Goto | February 9, 1981 |
| 2835 Ryoma | November 20, 1982 |
| 2880 Nihondaira | February 8, 1983 |
| 2961 Katsurahama | December 7, 1982 |
| 3150 Tosa | February 11, 1983 |
| 3182 Shimanto | November 27, 1984 |
| 3262 Miune | November 28, 1983 |
| 3431 Nakano | August 24, 1984 |
| 3785 Kitami | November 30, 1986 |
| 3822 Segovia | February 21, 1988 |
| 3851 Alhambra | October 30, 1986 |
| 3914 Kotogahama | September 16, 1987 |
| 3935 Toatenmongakkai | August 14, 1987 |
| 4039 Souseki | September 17, 1987 |
| 4095 Ishizuchisan | September 16, 1987 |
| 4097 Tsurugisan | November 18, 1987 |
| 4101 Ruikou | February 8, 1988 |
| 4223 Shikoku | May 7, 1988 |
| 4256 Kagamigawa | October 3, 1986 |
| 4290 Heisei | October 30, 1989 |
| 4399 Ashizuri | October 21, 1984 |
| 4411 Kochibunkyo | January 3, 1990 |
| 4439 Muroto | November 2, 1984 |
| 4441 Toshie | January 26, 1985 |
| 4496 Kamimachi | December 9, 1988 |
| 4498 Shinkoyama | January 5, 1989 |
| 4505 Okamura | February 20, 1990 |
| 4578 Kurashiki | December 7, 1988 |
| 4606 Saheki | October 27, 1987 |
| 4639 Minox | March 5, 1989 |
| 4670 Yoshinogawa | December 19, 1987 |
| 4675 Ohboke | September 19, 1990 |
| 4841 Manjiro | October 28, 1989 |
| 4865 Sor | October 18, 1988 |
| 5058 Tarrega | July 28, 1987 |
| 5113 Kohno | January 19, 1988 |
| 5124 Muraoka | February 4, 1989 |
| 5141 Tachibana | December 16, 1990 |
| 5179 Takeshima | March 1, 1989 |
| (5209) 1989 CW1 | February 13, 1989 |
| 5815 Shinsengumi | January 3, 1989 |
| 5823 Oryo | December 20, 1989 |
| 5824 Inagaki | December 24, 1989 |
| 5862 Sakanoue | January 13, 1983 |
| 5915 Yoshihiro | March 9, 1991 |
| 5962 Shikokutenkyo | April 18, 1990 |
| 5966 Tomeko | November 15, 1990 |
| 5969 Ryuichiro | March 17, 1991 |
| 6088 Hoshigakubo | October 18, 1988 |
| 6237 Chikushi | February 4, 1989 |
| 6244 Okamoto | August 20, 1990 |
| 6302 Tengukogen | February 2, 1989 |
| 6399 Harada | April 3, 1991 |
| 6449 Kudara | February 7, 1991 |
| 6458 Nouda | October 2, 1992 |
| 6497 Yamasaki | October 27, 1992 |
| 6514 Torahiko | November 25, 1987 |
| 6606 Makino | October 16, 1990 |
| 6660 Matsumoto | January 16, 1993 |
| 6699 Igaueno | December 19, 1987 |
| 6720 Gifu | November 11, 1990 |
| 6925 Susumu | October 24, 1993 |
| 6965 Niyodogawa | November 11, 1990 |
| 6971 Omogokei | February 8, 1992 |
| 7017 Uradowan | February 1, 1992 |
| 7094 Godaisan | September 4, 1992 |
| 7125 Eitarodate | February 7, 1991 |
| 7235 Hitsuzan | October 30, 1986 |
| 7274 Washioyama | March 21, 1982 |
| 7287 Yokokurayama | November 10, 1990 |
| 7289 Kamegamori | May 5, 1991 |
| 7410 Kawazoe | August 20, 1990 |
| 7415 Susumuimoto | November 14, 1990 |
| 7463 Oukawamine | September 20, 1985 |
| 7594 Shotaro | January 19, 1993 |
| 7650 Kaname | October 16, 1990 |
| (7693) 1982 WE | November 20, 1982 |
| 8083 Mayeda | November 1, 1988 |
| 8163 Ishizaki | October 27, 1990 |
| 8234 Nobeoka | November 3, 1997 |
| 8367 Bokusui | October 23, 1990 |
| 8375 Kenzokohno | January 12, 1992 |
| 8387 Fujimori | February 19, 1993 |
| 8428 Okiko | November 3, 1997 |
| 8485 Satoru | March 29, 1989 |
| 8492 Kikuoka | January 21, 1990 |
| 8732 Champion | December 8, 1996 |
| 8877 Rentaro | January 19, 1993 |
| 8957 Koujounotsuki | March 22, 1998 |
| 9032 Tanakami | November 23, 1989 |
| 9062 Ohnishi | November 27, 1992 |
| 9063 Washi | December 17, 1992 |
| 9196 Sukagawa | November 27, 1992 |
| 9198 Sasagamine | January 25, 1993 |
| 9323 Hirohisasato | February 11, 1989 |
| 9409 Kanpuzan | January 25, 1995 |
| 9745 Shinkenwada | November 2, 1988 |
| 9751 Kadota | August 20, 1990 |
| 9756 Ezaki | February 12, 1991 |
| (9852) 1990 YX | December 24, 1990 |
| 9870 Maehata | February 24, 1992 |
| 9964 Hideyonoguchi | February 13, 1992 |
| 10078 Stanthorpe | October 30, 1989 |
| 10091 Bandaisan | November 11, 1990 |
| 10094 Eijikato | February 20, 1991 |
| 10167 Yoshiwatiso | January 31, 1995 |
| 10300 Tanakadate | March 6, 1989 |
| (10321) 1990 UN2 | October 26, 1990 |
| (10547) 1992 JF | May 2, 1992 |
| (10791) 1992 CS | February 8, 1992 |
| (10803) 1992 UK9 | October 21, 1992 |
| (10829) 1993 UU | October 22, 1993 |
| (11288) 1990 XU | December 10, 1990 |
| (11294) 1992 CK | February 4, 1992 |
| (11296) 1992 KA | May 24, 1992 |
| (11304) 1993 DJ | February 19, 1993 |
| 11321 Tosimatumoto | February 21, 1995 |
| (11361) 1998 DD36 | February 28, 1998 |
| (11516) 1991 ED | March 6, 1991 |
| (11878) 1990 HJ | April 18, 1990 |
| (11925) 1992 YA1 | December 23, 1992 |
| (11927) 1993 BA | January 16, 1993 |
| 12084 Unno | March 22, 1998 |
| (12277) 1990 WN2 | November 17, 1990 |
| (12335) 1992 WJ3 | November 21, 1992 |
| (12690) 1988 VG1 | November 5, 1988 |
| (12706) 1990 TE1 | October 15, 1990 |
| (12749) 1993 CB | February 2, 1993 |
| (13015) 1987 XC | December 14, 1987 |
| (13529) 1991 RE1 | September 1, 1991 |
| (13553) 1992 JE | May 2, 1992 |
| (13569) 1993 EJ | March 4, 1993 |
| (13918) 1984 QB | August 24, 1984 |
| (13933) 1988 VE1 | November 2, 1988 |
| (13978) 1992 JQ | May 4, 1992 |
| (13989) 1993 BG | January 16, 1993 |
| (14012) 1993 XG | December 6, 1993 |
| (14880) 1991 CJ1 | February 7, 1991 |
| (15238) 1989 CQ | February 2, 1989 |
| (15252) 1990 OD1 | July 20, 1990 |
| (15723) 1990 SA2 | September 20, 1990 |
| (15739) 1991 ER | March 9, 1991 |
| (16503) 1990 TY | October 15, 1990 |
| (16602) 1993 FY3 | March 17, 1993 |
| (17461) 1990 UD1 | October 20, 1990 |
| (17465) 1990 VU3 | November 11, 1990 |
| 17508 Takumadan | May 3, 1992 |
| 17509 Ikumadan | May 4, 1992 |
| 18365 Shimomoto | November 17, 1990 |
| (18400) 1992 WY3 | November 25, 1992 |
| (18609) 1998 BN48 | January 30, 1998 |
| (18644) 1998 EX14 | March 2, 1998 |
| (19156) 1990 SE4 | September 20, 1990 |
| (19161) 1990 TQ1 | October 15, 1990 |
| (19197) 1992 EO | March 6, 1992 |
| (19210) 1992 YE4 | December 25, 1992 |
| (20040) 1992 WT3 | November 21, 1992 |
| (20102) 1995 BP15 | January 31, 1995 |
| 21014 Daishi | October 13, 1988 |
| 21016 Miyazawaseiroku | November 2, 1988 |
| 21022 Ike | February 2, 1989 |
| 21089 Mochizuki | February 8, 1992 |
| (21126) 1993 BJ2 | January 19, 1993 |
| (21166) 1993 XH | December 6, 1993 |
| (21282) 1996 TD15 | October 14, 1996 |
| (23468) 1990 SS3 | September 20, 1990 |
| (23478) 1991 BZ | January 21, 1991 |
| (23504) 1992 EX | March 7, 1992 |
| (23587) 1995 TE8 | October 2, 1995 |
| (24889) 1996 XU32 | December 11, 1996 |
| (26092) 1987 SF | September 16, 1987 |
| (26097) 1988 VJ1 | November 6, 1988 |
| (26123) 1992 OK | July 29, 1992 |
| (26127) 1993 BL2 | January 19, 1993 |
| (26151) 1994 TT3 | October 2, 1994 |
| (26837) 1991 RF1 | September 7, 1991 |
| (27716) 1989 CX1 | February 13, 1989 |
| (27739) 1990 UV | October 17, 1990 |
| (27740) 1990 UC1 | October 20, 1990 |
| (27790) 1993 CG1 | February 13, 1993 |
| (29157) 1989 ET1 | March 11, 1989 |
| (29186) 1990 UD2 | October 26, 1990 |
| (29199) 1991 FZ | March 17, 1991 |
| (29249) 1992 SN12 | September 26, 1992 |
| (29252) 1993 BY2 | January 25, 1993 |
| (29337) 1995 AE1 | January 6, 1995 |
| (30838) 1991 CM1 | February 7, 1991 |
| (30879) 1992 KF | May 25, 1992 |
| (30888) 1993 BG2 | January 19, 1993 |
| (32858) 1993 BA3 | January 25, 1993 |
| (35076) 1990 BA1 | January 21, 1990 |
| (35093) 1991 EH1 | March 14, 1991 |
| (37729) 1996 TK54 | October 14, 1996 |
| (39558) 1992 KC | May 24, 1992 |
| (39566) 1992 SQ1 | September 26, 1992 |
| (39712) 1996 TJ54 | October 14, 1996 |
| 39809 Fukuchan | November 30, 1997 |
| (42566) 1996 XQ25 | December 3, 1996 |
| (43792) 1990 VY1 | November 11, 1990 |
| (43794) 1990 YP | December 19, 1990 |
| (43803) 1991 RH2 | September 7, 1991 |
| (43857) 1993 VP2 | November 15, 1993 |
| (46580) 1992 GC | April 2, 1992 |
| (46592) 1992 YP | December 16, 1992 |
| (46595) 1992 YB4 | December 29, 1992 |
| (46596) 1993 BD | January 16, 1993 |
| (48482) 1992 CN | February 5, 1992 |
| (48495) 1993 BB | January 16, 1993 |
| (52285) 1990 OX2 | July 30, 1990 |
| 52455 Masamika | January 6, 1995 |
| (58164) 1989 WV3 | November 20, 1989 |
| (58184) 1991 RG1 | September 7, 1991 |
| (58185) 1991 RH1 | September 7, 1991 |
| (65716) 1993 BZ2 | January 25, 1993 |
| (65894) 1998 BO48 | January 30, 1998 |
| (79130) 1990 UC2 | October 26, 1990 |
| (79149) 1992 UR4 | October 27, 1992 |
| (79152) 1993 FX3 | March 17, 1993 |
| (90713) 1990 VE3 | November 11, 1990 |
| (120462) 1990 UE2 | October 26, 1990 |
Tsutomu Seki (関勉? born November 3, 1930) is a Japanese astronomer, born in Kochi, Japan.
He has discovered a number of comets, including the celebrated bright C/1965 S1 (Ikeya-Seki).
He has also discovered a large number of asteroids, including the Amor asteroid (13553) 1992 JE and the Trojan asteroid (5209) 1989 CW1.
Many of his discoveries are named after famous sites in Kochi, such as Harimaya-bashi, Ryoma (after Sakamoto Ryoma), Katsurahama, and Kagami-gawa, to name a few.
Director of the Geisei Observatory in Kochi, and in charge of the Comet Section of the Oriental Astronomical Association.
