Satellites, space stations, and deep space probes.
| Label | Operator | Status | Orbit | Launch Date | Mission Type |
|---|---|---|---|---|---|
| WIRE | NASA Goddard Space Flight Center | retired | LEO | 3/5/1999 | Science Exploration |
| Raduga-1 (1999-010A) Радуга-1 | Russian Space Forces | retired | GEO | 2/28/1999 | Communications |
| Skynet 4E | U.K. Ministry of Defence | active |
| GEO |
| 2/26/1999 |
| Communications |
| Arabsat 3A | Arabsat | retired | GEO | 2/26/1999 | Communications |
| Sunsat-OSCAR-35 | Stellenbosch University | retired | LEO | 2/23/1999 | Communications |
| ARGOS | U.S. Air Force | retired | LEO | 2/23/1999 | Science Exploration |
| Orsted Ørsted | Danish Meteorological Institute | retired | LEO | 2/23/1999 | Science Exploration |
| Soyuz TM-29 Союз ТМ-29 | RSC Energia | retired | LEO | 2/20/1999 | Human Spaceflight |
| JCSAT 4A | Japan Satellite Systems Inc | retired | GEO | 2/16/1999 | Communications |
| Telstar 6 | Loral Skynet | retired | GEO | 2/15/1999 | Communications |
| Globalstar M038 | Globalstar | retired | LEO | 2/9/1999 | Communications |
| Globalstar M036 | Globalstar | retired | LEO | 2/9/1999 | Communications |
| Globalstar M040 | Globalstar | retired | LEO | 2/9/1999 | Communications |
| Globalstar M023 | Globalstar | retired | LEO | 2/9/1999 | Communications |
| Sample Return Capsule | NASA Jet Propulsion Laboratory | retired | interplanetary | 2/7/1999 | Science Exploration |
| Stardust | NASA Jet Propulsion Laboratory | retired | interplanetary | 2/7/1999 | Science Exploration |
| Formosat-1 福爾摩沙衛星一號 | Angola National Space Program Management Office | retired | LEO | 1/27/1999 | Earth Observation |
| DS2 Scott Probe | NASA Jet Propulsion Laboratory | retired | interplanetary | 1/3/1999 | Science Exploration |
| DS2 Amundsen Probe | NASA Jet Propulsion Laboratory | retired | interplanetary | 1/3/1999 | Science Exploration |
| Mars Polar Lander | NASA Jet Propulsion Laboratory | retired | interplanetary | 1/3/1999 | Science Exploration |
| Kosmos-2363 Космос-2363 | Russian Space Forces | retired | MEO | 12/30/1998 | Positioning Navigation Timing |
| Kosmos-2362 Космос-2362 | Russian Space Forces | retired | MEO | 12/30/1998 | Positioning Navigation Timing |
| Kosmos-2364 Космос-2364 | Russian Space Forces | retired | MEO | 12/30/1998 | Positioning Navigation Timing |
| Kosmos-2361 Космос-2361 | Russian Navy | retired | LEO | 12/24/1998 | Positioning Navigation Timing |
| PAS 6B | PanAmSat | retired | GEO | 12/22/1998 | Communications |
| Iridium 11A | Iridium | retired | LEO | 12/19/1998 | Communications |
| Iridium 20A | Iridium | retired | LEO | 12/19/1998 | Communications |
| Mars Climate Orbiter | NASA Jet Propulsion Laboratory | retired | interplanetary | 12/11/1998 | Science Exploration |
| Nadezhda (1998-072A) Надежда | Russian Navy | retired | LEO | 12/10/1998 | Positioning Navigation Timing |
| Astrid-2 | Swedish Space Corporation | retired | LEO | 12/10/1998 | Science Exploration |
| Satmex 5 | Satmex | retired | GEO | 12/6/1998 | Communications |
| SWAS | NASA Goddard Space Flight Center | retired | LEO | 12/6/1998 | Science Exploration |
| SAC-A | CONAE (Argentina) | retired | LEO | 12/4/1998 | Communications |
| PMA-1 | NASA Johnson Space Center | active | LEO | 12/4/1998 | Human Spaceflight |
| Endeavour (STS-88) | NASA Johnson Space Center | retired | LEO | 12/4/1998 | Human Spaceflight |
| Mightysat 1 | Air Force Research Lab (AFRL) | retired | LEO | 12/4/1998 | Technology Demonstration |
| PMA-2 | NASA Johnson Space Center | active | LEO | 12/4/1998 | Human Spaceflight |
| Unity | NASA Johnson Space Center | active | LEO | 12/4/1998 | Human Spaceflight |
| BONUM-1 Бонум-1 | BONUM-1 Co., Media Most | retired | GEO | 11/22/1998 | Communications |
| Proves-Taygeta | Cal Poly | active | - | 11/20/1998 | Technology Demonstration |
| Coconut | Arizona State University | active | - | 11/20/1998 | Communications |
| LeopardSat-1 | University of Cincinnati | active | - | 11/20/1998 | Communications |
| HUCSat | Harvard University | active | - | 11/20/1998 | Communications |
| Hokushin-1 | Tohoku University | active | LEO | 11/20/1998 | Technology Demonstration |
| Zarya | NASA Johnson Space Center | active | LEO | 11/20/1998 | Human Spaceflight |
| Iridium 2 | Iridium | retired | LEO | 11/6/1998 | Communications |
| Iridium 85 | Iridium | retired | LEO | 11/6/1998 | Communications |
| Iridium 83 | Iridium | retired | LEO | 11/6/1998 | Communications |
| Iridium 86 | Iridium | retired | LEO | 11/6/1998 | Communications |
| Iridium 84 | Iridium | retired | LEO | 11/6/1998 | Communications |