| 1998-001 | 1998-01-07 0228 | Athena-2 | LM-004 | Lunar Prospector (LP) | SPFL SLC46 | US | S |
| 1998-002 | 1998-01-10 0032 | Delta 7925-9.5 | D252 | Skynet 4D | CC LC17B | US | S |
| 1998-F01 | 1998-01-22 1256 | Shavit 1 | 4 | ‘Ofeq-4 (EROS A) | PALB | IL | F |
| 1998-003 | 1998-01-23 0248 | Space Shuttle | STS-89 | Shuttle/Mir-8 (OV-105 Shuttle/Mir) | KSC LC39A | US | S |
| 1998-004 | 1998-01-29 1633 | Soyuz-U-PVB | S 15000-657 | Soyuz TM-27 (Soyuz 7K-STM No. 76) | GIK-5 LC1 | RU | S |
| 1998-005 | 1998-01-29 1837 | Atlas IIA | AC-109 MLV-7 | USA 137 [SDS12] (QUASAR 12?) | CC SLC36A | US | S |
| 1998-006 | 1998-02-04 2329 | Ariane 44LP | V105 L475d | Brasil B3/Inmar 3F5 (Brasilsat B3) | CSG ELA2 | EU | S |
| 1998-007 | 1998-02-10 1320 | Taurus 2210 | T2 | GFO/Orbcomm (GFO) | V 576E | US | S |
| 1998-008 | 1998-02-14 1434 | Delta 7420-10C | D253 | Globalstar 1-4 (Globalstar D-1) | CC LC17A | US | S |
| 1998-009 | 1998-02-17 1035 | Soyuz-U-PVB | A 15000-046 | Kosmos-2349 (Kometa No. 19) | GIK-5 LC31 | RU | S |
| 1998-010 | 1998-02-18 1358 | Delta 7920-10C | D254 | Iridium MS-7 | V SLC2W | US | S |
| 1998-011 | 1998-02-21 0755 | H-II | H-II-5F | COMETS | TNSC Y | JP | S |
| 1998-012 | 1998-02-26 0707 | Pegasus XL | F20 | SNOE/T1 (SNOE) | V RW30 | US | S |
| 1998-013 | 1998-02-27 2238 | Ariane 42P | V106 L476c | Hot Bird 4 (Eutelsat HB4) | CSG ELA2 | EU | S |
| 1998-014 | 1998-02-28 0021 | Atlas IIAS | AC-151 | Intelsat 806 (INTELSAT 806) | CC SLC36B | US | S |
| 1998-015 | 1998-03-14 2245 | Soyuz-U-PVB | S 15000-656 | Progress M-38 (Progress 7K-TGM No 240) | GIK-5 LC1 | RU | S |
| 1998-016 | 1998-03-16 2132 | Atlas II | AC-132 | USA 138 (UHF F8) (UFO F8) | CC SLC36A | US | S |
| 1998-017 | 1998-03-24 0146 | Ariane 40 | V107 L477b | SPOT 4 (SPOT-4) | CSG ELA2 | EU | S |
| 1998-018 | 1998-03-25 1701 | Chang Zheng 2C-III/SD | Y3 | Iridium 51/61 (Iridium SV051) | TYSC LC7 | CN | S |
| 1998-019 | 1998-03-30 0602 | Delta 7920-10C | D255 | Iridium MS-8 | V SLC2W | US | S |
| 1998-020 | 1998-04-02 0242 | Pegasus XL | F21 | TRACE | V RW30/12 | US | S |
| 1998-021 | 1998-04-07 0213 | Proton-K/17S40 | 391-02 | Iridium (Iridium SV062) | GIK-5 LC81/23 | RU | S |
| 1998-022 | 1998-04-17 1819 | Space Shuttle | STS-90 | Neurolab (OV-102 Spacelab) | KSC LC39B | US | S |
| 1998-023 | 1998-04-24 2238 | Delta 7420-10C | D256 | Globalstar 5-8 (Globalstar D-2) | CC LC17A | US | S |
| 1998-024 | 1998-04-28 2253 | Ariane 44P | V108 L478b | Nilesat 101/BSAT 1b (Nilesat 101) | CSG ELA2 | EU | S |
| 1998-025 | 1998-04-29 0436 | Proton-K/DM-2 | 384-02 | Kosmos-2350 (Oko-1 No. 7122) | GIK-5 LC200/39 | RU | S |
| 1998-026 | 1998-05-02 0916 | Chang Zheng 2C-III/SD | Y4 | Iridium 69/71 (Iridium SV069) | TYSC LC7 | CN | S |
| 1998-027 | 1998-05-07 0853 | Molniya 8K78M | 78051 -676 | Kosmos-2351 (Oko) | GIK-1 LC16/2 | RU | S |
| 1998-028 | 1998-05-07 2345 | Proton-K/DM-2M | 393-02 | Echostar 4 | GIK-5 LC81/23 | RU | S |
| 1998-029 | 1998-05-09 0138 | Titan 401B/Centaur | 4B-25/TC-18 (K-25) | USA 139 [RH8] (ORION 4) | CC LC40 | US | S |
| 1998-030 | 1998-05-13 1552 | Titan II SLV | 23G-12 | NOAA 15 (NOAA K) | VS SLC4W | US | S |
| 1998-031 | 1998-05-14 2212 | Soyuz-U-PVB | M 15000-661 | Progress M-39 (Progress 7K-TGM No 238) | GIK-5 LC1 | RU | S |
| 1998-032 | 1998-05-17 2116 | Delta 7920-10C | D257 | Iridium MS-9 | V SLC2W | US | S |
| 1998-033 | 1998-05-30 1000 | Chang Zheng 3B | Y5 | Zhongwei 1 (Chinastar 1) | XSC LC2 | CN | S |
| 1998-034 | 1998-06-02 2206 | Space Shuttle | STS-91 | Shuttle/Mir-9 (OV-103 Shuttle/Mir) | KSC LC39A | US | S |
| 1998-035 | 1998-06-10 0035 | Delta 7925-9.5 | D258 | Thor III (Thor 3) | CC LC17A | US | S |
| 1998-036 | 1998-06-15 2258 | Tsiklon-3 | 450-91- 702 | Kosmos-2352/2357 (Strela-3) | GIK-1 LC32/1 | RU | S |
| 1998-037 | 1998-06-18 2248 | Atlas IIAS | AC-153 | Intelsat 805 (INTELSAT 805) | CC SLC36A | US | S |
| 1998-038 | 1998-06-24 1829 | Soyuz-U-PVB | Kh15000-043 | Kosmos-2358 (Kobal’t) | GIK-1 LC43/3 | RU | S |
| 1998-039 | 1998-06-25 1400 | Soyuz-U-PVB | A 15000-499 | Kosmos-2359 (Neman) | GIK-5 LC31 | RU | S |
| 1998-040 | 1998-07-01 0048 | Molniya 8K78M | 77017 -682 | Molniya-3 (Molniya-3 No. 61) | GIK-1 LC43/3 | RU | S |
| 1998-041 | 1998-07-03 1812 | M-V | M-V-3 | PLANET B/KM (Planet B) | KASC M-V | JP | S |
| 1998-042 | 1998-07-07 0315 | Shtil’-1 | L-1492-524 | TUBSAT-N (Tubsat-N) | BLA LP1 | RU | S |
| 1998-043 | 1998-07-10 0630 | Zenit-2 | 67021-803/18NI | Resurs-O1 No. 4 (Resurs-O1 No. 4L) | GIK-5 LC45/1 | RU | S |
| 1998-044 | 1998-07-18 0920 | Chang Zheng 3B | Y4 | Sinosat (xinnuo yihao) | XSC LC2 | CN | S |
| 1998-045 | 1998-07-28 0915 | Zenit-2 | 45092-803/1-98 | Kosmos-2360 (Tselina-2 No. 14L) | GIK-5 LC45/1 | RU | S |
| 1998-046 | 1998-08-02 1624 | Pegasus XL/HAPS | F22 | Orbcomm B1-B8 (Orbcomm FM17) | WIMB RW04/22? | US | S |
| 1998-F02 | 1998-08-12 1130 | Titan 401A/Centaur | 4A-20/TC-9 (K-17) | - [CY16] (MERCURY 3) | CC LC41 | US | F |
| 1998-047 | 1998-08-13 0943 | Soyuz-U-PVB | M 15000-658 | Soyuz TM-28 (Soyuz 7K-STM No. 77) | GIK-5 LC1 | RU | S |
| 1998-048 | 1998-08-19 2301 | Chang Zheng 2C-III/SD | Y5 | Iridium 78/76 (Iridium SV078) | TYSC LC7 | CN | S |
| 1998-049 | 1998-08-25 2307 | Ariane 44P | V109 L479c | ST-1 (Singapore-Taiwan 1) | CSG ELA2 | EU | S |
| 1998-F03 | 1998-08-27 0117 | Delta 8930 | D259 | Galaxy X | CC LC17B | US | F |
| 1998-050 | 1998-08-30 0031 | Proton-K/DM-2M | 383-01 | Astra 2A | GIK-5 LC81/23 | RU | S |
| 1998-F04 | 1998-08-31 0307 | Paektusan 1 | - | Kwangmyongsong-1 | TONGH | KP | F |
| 1998-051 | 1998-09-08 2113 | Delta 7920-10C | D260 | Iridium MS-10 | V SLC2W | US | S |
| 1998-F05 | 1998-09-09 2029 | Zenit-2 11K77.05 | 67047-801/22L | Globalstar (Globalstar Z1) | GIK-5 LC45/1 | RU | F |
| 1998-052 | 1998-09-16 0631 | Ariane 44LP | V110 L480f | PAS 7 | CSG ELA2 | EU | S |
| 1998-053 | 1998-09-23 0506 | Pegasus XL/HAPS | F23 | Orbcomm C1-C8 (Orbcomm FM21) | WIMB RW04/22? | US | S |
| 1998-054 | 1998-09-28 2341 | Molniya 8K78M | Kh15000-030 | Molniya-1T (Molniya-1T No. 99) | GIK-1 LC43/3 | RU | S |
| 1998-055 | 1998-10-03 1004 | ARPA Taurus | T3 1110 | STEX/USA 141 (STEX) | V 576E | US | S |
| 1998-056 | 1998-10-05 2251 | Ariane 44L | V111 L481f | Eutelsat W2/Sirius 3 (Eutelsat W2) | CSG ELA2 | EU | S |
| 1998-057 | 1998-10-09 2250 | Atlas IIA | AC-134 | Hot Bird 5 (Eutelsat HB5) | CC SLC36B | US | S |
| 1998-058 | 1998-10-20 0719 | Atlas IIA | AC-130 | USA 140 (UHF F9) (UFO F9) | CC SLC36A | US | S |
| 1998-059 | 1998-10-21 1637 | Ariane 5G | V112 (503) | ARD/Maqsat-3 (Maqsat-3) | CSG ELA3 | EU | S |
| 1998-060 | 1998-10-23 0002 | Pegasus H | F24/P-33 | SCD-2 | CC RW30/12 | US | S |
| 1998-061 | 1998-10-24 1208 | Delta 7326-9.5 | D261 | Deep Space 1 | CC SLC17A | US | S |
| 1998-062 | 1998-10-25 0414 | Soyuz-U-PVB | M 15000-660 | Progress M-40 (Progress 7K-TGM No 239) | GIK-5 LC1 | RU | S |
| 1998-063 | 1998-10-28 2215 | Ariane 44L | V113 L482d | Afristar/GE 5 (Afristar) | CSG ELA2 | EU | S |
| 1998-064 | 1998-10-29 1919 | Space Shuttle | STS-95 | Spartan 201/Spacehab (OV-103 Research/FF) | KSC LC39B | US | S |
| 1998-065 | 1998-11-04 0512 | Proton-K/DM-2M | 395-02 | PAS 8 | GIK-5 LC81/23 | RU | S |
| 1998-066 | 1998-11-06 1337 | Delta 7920-10C | D262 | Iridium MS-11 | V SLC2W | US | S |
| 1998-067 | 1998-11-20 0640 | Proton-K | 395-01 | Zarya (77KM No. 17501) | GIK-5 LC81/23 | RU | S |
| 1998-068 | 1998-11-22 2354 | Delta 7925-9.5 | D263 | BONUM-1 | CC SLC17B | US | S |
| 1998-069 | 1998-12-04 0835 | Space Shuttle | STS-88 | ISS 2A (Unity) (OV-105 ISS) | KSC LC39A | US | S |
| 1998-070 | 1998-12-06 0043 | Ariane 42L | V114 L483c | Satmex 5 | CSG ELA2 | EU | S |
| 1998-071 | 1998-12-06 0057 | Pegasus XL | F25 | SWAS | V RW30/12 | US | S |
| 1998-072 | 1998-12-10 1157 | Kosmos 11K65M | 53713-320 | Nadezhda/Astrid-2 (Nadezhda 17F118) | GIK-1 LC132/1 | RU | S |
| 1998-073 | 1998-12-11 1845 | Delta 7425-9.5 | D264 | Mars Climate Orbiter (MCO) | CC SLC17A | US | S |
| 1998-074 | 1998-12-19 1139 | Chang Zheng 2C-III/SD | Y6 | Iridium 88/89 (Iridium SV088?) | TYSC LC7 | CN | S |
| 1998-075 | 1998-12-22 0108 | Ariane 42L | V115 L484d | PAS 6B | CSG ELA2 | EU | S |
| 1998-076 | 1998-12-24 2002 | Kosmos 11K65M | 47164-504 | Kosmos-2361 (Parus) | GIK-1 LC132/1 | RU | S |
| 1998-077 | 1998-12-30 1835 | Proton-K/DM-2 | 385-02 | Kosmos-2362/2364 (Uragan No. 86L) | GIK-5 LC200/39 | RU | S |
