Constellations
Satellite constellations
3 constellations tracked in this selection, ranked by active satellites. The 3 shown on this page account for 87 active satellites. Membership is derived from curated name patterns and CelesTrak groups — see the methodology.
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| # | Constellation | Operator | Service | Orbit | Active | On orbit | Total | 365 d | 30 d | Activity derived | Median perigee | First launch | Last launch |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | GPS (NAVSTAR)US | United States Space Force | Navigation | MEO | 33 | 80 | 80 | 2 | 0 | 0.6 | 19,956 km | 22 Feb 1978 | 21 Apr 2026 |
| 2 | Galileo | European Union Agency for the Space Programme (EUSPA) | Navigation | MEO | 30 | 36 | 37 | 2 | 0 | 0.7 | 23,211 km | 18 Oct 1989 | 17 Dec 2025 |
| 3 | GLONASSRU | Roscosmos / Russian Space Systems (GLONASS) | Navigation | MEO | 24 | 29 | 29 | 2 | 1 | 5.0 | 19,100 km | 26 Oct 2007 | 24 Aug 2026 |
3 results