1998年の彗星
| 新符号 | 名前 | 旧仮符号 | 発見日 | 発見者 | 眼視 | 写真GET | iauc | 近日点通過日 T | q | 周期 |
| P/1998B1 | 135P/Shoemaker-Levy 8 | Jan. 22.23 | C. W. Hergenrother | 6821 | 1999 Dec. 10.5994 TT | 2.7212 | P = 7.495 years | |||
| P/1998 G1 | LINEAR | Apr. 2.130 | M. Blythe | 6863 | 1998Nov16 | q=2.13 | P=41.5 | |||
| C/1998 H1 | Stonehouse | Apr. 22.25 | Patrick L. Stonehouse | ok | 6883 | 1998 Apr. 14.2 | q=1.48 | |||
| C/1998J1 | SOHO | S. Stezelberger | 6894 | 1998 May 8.35 | 0.150 | |||||
| C/1998 K1 | Mueller | May 16.20 | J. Mueller | ok | 6908 | 1998 Sept. 1.04 | q=3.41 | P=487 | ||
| C/1998 K2 | LINEAR | May 22.365 | F. Shelly | ok | 6915 | 1998 Sept. 3.16 | q = 2.305 | |||
| C/1998 K3 | LINEAR | |||||||||
| C/1998 K4 | 136P/Mueller 3 | May 24.430 | J. V. Scotti, | 6919 | 1999 Mar. 20.504 | 3.0104 | P = 8.707 years | |||
| C/1998 K5 | LINEAR | May 26.379 | ok | 6923 | 1998 July 17.437 | q=0.963 | ||||
| P/1998 K6 | 137P/Shoemaker-Levy 2 | May 19.3558 | C. W. Hergenrother | ok | 6928 | 2000 Feb. 6.0494 TT | q = 1.8686 | P = 9.378 years | ||
| C/1998 M1 | LINEAR | June 16.243 | M. Blythe | ok | 6940 | 1998 Oct. 29.22 | q = 3.11 | |||
| C/1998 M2 | LINEAR | May 28.40 | M. Blythe | ok | 6949 | 1998 Oct. 13.20 | q=2.72 | |||
| C/1998 M3 | Larsen | May 26.29 | M. Blythe | 6951 | 1998 June 28.68 | q = 5.77 | ||||
| C/1998 M4 | LINEAR | June 25.346 | M. Blythe | x 1998July22 | 6953 | 1997 Dec. 2.64 | q = 2.479 | |||
| C/1998 M5 | LINEAR | June 30.309 | F. Shelly | ok | ok | 6959 | 1999 Jan. 24.0 | q=2.11 | ||
| C/1998 M6 | Montani | June 30.340 | J. Montani | 6960 | 1997 Nov. 16.30 | q=5.73 | ||||
| P/1998 O1 | 138P/Shoemaker-Levy 7 | July 25.4269 | J. V. Scotti | 6979 | T = 1998 Aug. 24.5726 TT | 1.6972 | P = 6.887 years | |||
| C/1998 P1 | Williams | Aug. 10.486 | P. Williams | ok | 6986 | 1998 Oct. 17.853 | q=1.14 | |||
| C/1998 Q1 | LINEAR | Aug. 24.296 | M. Blythe | ok | 6995 | 1998 June 28.1 | q=1.56 | |||
| P/1998 QP_54 | P/Loneos_Tucker | ok | 7012 | 1998 Oct. 6.41 | 1.881 | P = 8.603 | ||||
| P/1998 S1 | LINEAR-Mueller | Sept.26.217 | ok | 7031 | 1998 Nov. 3.18 | q=2.54 | P=9.14 | |||
| C/1998 T1 | LINEAR | Oct. 2 | ok | 7026 | 1999 June 25.625 | q=1.47 | ||||
| C/1998 U1 | LINEAR | Oct.18 | x_1998Nov11 | 7033 | 1998 June 1.479 | q=4.07 | ||||
| P/1998 U2 | Mueller | Oct. 21.340 | J. Mueller | ok | 7035 | 1998 Oct. 21.989 | q = 2.029 | P=8.78 | ||
| P/1998 U3 | Jager | Oct. 23.93 | M. Jager | ok | 7038 | 1999 Mar. 7.771 | q=2.15 | P=15.4 | ||
| P/1998 U4 | Spahr | Oct. 27.378 | T. B. Spahr | ok | 7042 | 1999 Mar. 28.75 | q=3.93 | P=13.47 | ||
| C/1998 U5 | LINEAR | Oct. 30.374 | M. Blythe | ok | ok | 7044 | 1998 Dec. 21.77 | q=1.23 | ||
| P/1998 VS24 | LINEAR | Oct. 24.84 | Visnjan | x_1998Dec21 | 7071 | 1998 Nov. 6.37 | q=3.40 | P=9.53 | ||
| P/1998 W1 | Spahr | Nov. 16.387 | T. B. Spahr | ok | 7052 | 1999 Jan. 18.85 | q=1.72 | P=6.72 | ||
| P/1998 W2 | Hergenrother | Nov. 21.095 | C. W. Hergenrother | x_1998Dec21 | 7057 | 1998 Dec. 6.05 | q = 1.41 | P = 6.78 | ||
| C/1998 W3 | LINEAR | Nov. 25.299 | M. Blythe | ok | 7063 | 1999 Feb. 9.20 | q=4.86 | |||
| 1998 WG22 | 139P/Vaisala-Oterma | 7064 | 1998 Sept.27.2636 TT | 3.3915 | P = 9.546 years | |||||
| C/1998 X1 | ODAS | Dec. 15.173 | A. Maury | x_1998Dec21 | 7067 | 1998 Aug. 19.08 | q=1.88 | |||
| C/1998 Y1 | LINEAR | Dec. 22.309 | M. Blythe | x_1999Jan17 | 7072 | 1998 Nov. 20.96 | q = 1.786 | |||
| P/1998 Y2 | Li | Dec. 26.235 | Weidong Li | ok | 7075 | P=15.2 | ||||
| 1998年の彗星は1998Y2まで | ||||||||||