1999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 | Ｔ | q | P |
| C/1999A1 | Tilbrook | Jan.12.48 | ok | |||||||
| P/1999D1 | Hermann | Feb.20.40 | - | 7111 | 13.4 | |||||
| P/1999DN_3 | Korlevic-Juric | Feb.18.97 | ×1999June | 7167 | 9.6 | |||||
| C/1999E1 | Li | Mar 13.17 | Li,Weidong | ok | 7126 | |||||
| C/1999F1 | Catarina | Mar.23.316 | Catalina Sky Survey | ×1999June | 7148 | |||||
| C/1999F2 | Dalcanton | June18.** | Dalcanton,J | ok | 7194 | 1998 Aug. 23.99 | 4.71 | |||
| C/1999G1 | LINEAR | Apr. 7.23 | ok | 7140 | 1998 Sept.22.47 | 4.39 | ||||
| C/1999H1 | Lee | Apr.16.5 | Steven Lee | ok | ok | 7144 | 1999 July 11.17 | 0.71 | ||
| C/1999H3 | LINEAR | Apr.22.30 | ok | 7151 | 1999 Aug. 17.9 | 3.50 | ||||
| C/1999J2 | Skiff | May 13.40 | B. A. Skiff | ok | 7165 | 1999 Oct. 23.96 | 7.48 | |||
| C/1999J3 | LINEAR | May 14.13 | ok | ok | 7166 | 1999 Sept.23.6 | 1.147 | |||
| C/1999J4 | LINEAR | May 15.31 | ×1999May,June | 7170 | 1999 Oct. 28.0 | 3.86 | ||||
| P/1999J5 | LINEAR | May 12.35 | - | 7201 | 1999 May 12.83 | 9.45 | ||||
| C/1999K2 | Ferris | May 19.36 | ok | 7175 | 1999 Oct. 30.58 | 5.16 | ||||
| C/1999K3 | LINEAR | May 20.26 | - | 7175 | 1999 Feb. 26.75 | 1.91 | ||||
| C/1999K4 | LINEAR | May 17.32 | - | 7176 | ||||||
| C/1999K5 | LINEAR | May 20.31 | ok | 7178 | 2000 July 4.8 | 3.27 | ||||
| C/1999K6 | LINEAR | May 20.22 | ok | 7180 | 1999 July 24.1 | 2.25 | ||||
| C/1999K7 | LINEAR | May 24.34 | - | 7181 | 1999 Feb. 15.8 | 2.27 | ||||
| C/1999K8 | LINEAR | May 26.38 | ok | 7182 | 2000 Jan. 17.58 | 4.84 | ||||
| C/1999L2 | LINEAR | June11.24 | ×1999July | 7199 | 1999 Aug. 5.3 | 1.90 | ||||
| C/1999L3 | LINEAR | June11.24 | ok | 7200 | 1999 Dec. 31.3 | 2.09 | ||||
| C/1999N2 | Lynn | July13.45 | Daniel W. Lynn | ok | 7222 | 1999 July 23.09 | 0.76 | |||
| C/1999N4 | LINEAR | July12.25 | ok | 7226 | 2000 May 3.2 | 5.57 | ||||
| P/1999P1 | 141P/Machholz 2 | Aug. 3.55 | R. H. McNaugh | 7231 | 1999 Dec. 9.2798 | 0.7489 | 5.219 | |||
| P/1999R2 | 142P/Ge-Wang | Sept.15.44 | J. V. Scotti | 7255 | T = 1999 June 21.4782 TT | 2.4964 | P = 11.167 years | |||
| C/1999RO28 | LONEOS | Sept 7.33 | (C. Hergenrother) | ok | 7253 | 1999 Oct. 2.35 | 1.23 | |||
| C/1999S2 | McNAUGHT-WATSON | Sept19.72 | R. H. McNaught,F. G. Watson | - | 7260 | 2001 Aug. 18.89 | 6.83 | |||
| C/1999S3 | LINEAR | Sept.24.34 | LINEAR(M. Bezpalko) | ok | 7264 | 1999 Nov. 6.0 | 1.92 | |||
| C/1999S4 | LINEAR | Sept.27.39 | LINEAR | ok | ok | 7267 | 2000 July 26.46 | 0.766 | ||
| C/1999T1 | McNAUGHT-HARTLEY | Oct. 7.63 | Robert H. McNaught | ok | ok | 7273 | 2000 Dec. 9.6 | 1.15 | ||
| C/1999T2 | LINEAR | Oct. 14.15 | LINEAR(F. Shelly) | ok | 7280 | 2000 Nov. 24.68 | 3.02 | |||
| C/1999T3 | LINEAR | Oct. 3.33 | LINEAR | ok | 7289 | 2000 Aug. 29.13 | 5.37 | |||
| C/1999U1 | FERRIS | Oct. 18.38 | W. D. Ferris | - | 7283 | 1998 Aug. 17.97 | 2.92 | |||
| P/1999U3 | LINEAR | Oct. 30.32 | LINEAR (R. Huber) | ok | 7295 | 1999 Nov. 5.9 | 1.87 | P = 12.53 | ||
| C/1999U4 | CATALINA-SKIFF | CATALINA & B. A. Skiff | ok | 7298 | 2001 Sept.14.4 | 4.77 | ||||
| C/1999V1 | CATALINA | Nov. 5.43 | Catalina Sky Survey(C. W. Hergenrother) | - | 7302 | 1999 Oct. 22.18 | 2.96 | P = 19.32 | ||
| P/1999 WJ_7 | KORLEVIC | Nov. 28.94427 | Korado Korlevic | ok | 7368 | 2000 Feb.15.2 | P = 9.97 | |||
| C/1999X1 | Hug-Bell | Dec.10 | Gary Hug and Graham E. Bell | - | 7331 | 1999 June 20.7 | 1.93 | P = 7.01 | ||
| P/1999 XB_69 | LINEAR | Dec. 7.29234 | - | 7370 | 2000 Feb. 17.0 | 1.64 | P = 9.4 | |||
| P/1999 XN_120 | CATALINA | Dec. 5.19023 | - | 7370 | 2000 May 1.4 | 3.29 | P = 8.5 | |||
| C/1999XS87 | LINEAR | Dec. 7.37830 | x2000Feb | 7344 | 1999 Aug. 6.5 | 2.77 | P = 72.7 | |||
| C/1999 Y1 | LINEAR | Dec. 20.22291 | ok | ok | 7338 | 2001 Mar. 23.7 | 3.19 | |||
| 1999年の彗星は1999Y1まで | ||||||||||