Satellite · NORAD 27663 · COSPAR 2003-005A
NAVSTAR 51 (USA 166)
- Operator United States Space Force
- Constellation GPS (NAVSTAR)
- Country United States
Altitude now
19,848.6km
SGP4 propagation
Velocity
3.92km/s
Inclination
54.87°
Period
12.0 h
718.0 min
Perigee
19,784km
Apogee
20,582km
orbit freshOrbit updated 8 h ago · element epoch 11 Sept 2026 14:28 UTC (6.8 h old)· Metadata updated 8 h ago
Live position
Ground track & current position
Propagated client-side every 5 s from the latest element set (SGP4). Accuracy degrades with element age.
Loading ground track…
- Latitude
- 16.332° N
- Longitude
- 87.313° W
- Altitude
- 19848.6 km
- Velocity
- 3.923 km/s
- past 45 min
- next 90 min
- first fix from server render · element epoch 11 Sept 2026 14:28 UTC
Mission
Mission & classification
Ownership
Operator & country
- Operator
- United States Space Force
- SATCAT owner code
- US · United States
- Country
- United States US
Launch
Launch
- Launch date
- 29 Jan 2003
- COSPAR launch id
- 2003-005
Objects from the same launch · 5
- DELTA 2 DEB27773DebrisDecayed
- DELTA 2 DEB27955DebrisDecayed
- XSS-1027664PayloadUnknown
- DELTA 2 R/B(1)27665Rocket bodyInactive
- DELTA 2 R/B(2) [PAM-D]27666Rocket bodyDecayed
Change log
History
| Field | Change | Source | Date |
|---|---|---|---|
| Owner Code | ∅ → US | Celestrak Satcat | 11 Sept 2026 18:53 UTC |
| Orbit Class | ∅ → MEO | Celestrak | 11 Sept 2026 18:53 UTC |
Regulatory
UN registration
Transparency
Sources & provenance
CelesTrakcommunity
Orbital data courtesy of CelesTrak (Dr. T.S. Kelso).
last sync 6 h ago
CelesTrak SATCATcommunity
Satellite catalog data courtesy of CelesTrak.
last sync 8 h ago
Field provenance
| Field | Source | Observed | Confidence |
|---|---|---|---|
| Canonical Name | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Decay Date | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Launch Date | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Object Type | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Orbital Elements | CelesTrak | 11 Sept 2026 20:57 UTC | 100% |
| Owner Code | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Status | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
Timeline
Events
No events detected for this object yet. Launches, decays and orbit changes are generated by the derived-analytics connector.
Reference
Identifiers
- NORAD catalogue number
- 27663
- COSPAR / international designator
- 2003-005A
- SatelliteIndex id
- sat_01M28X2SWT01QM2JGQ9QTBM24T
- Canonical slug
- navstar-51-usa-166-27663
Orbit class, mission type and constellation membership are derived by SatelliteIndex (Navigation) — see the methodology. Positions are propagated estimates, not tracking measurements; never use them for conjunction assessment.