Satellite · NORAD 37818 · COSPAR 2011-052A
TACSAT 4
- Operator United States
- Constellation —
- Country United States
Altitude now
6,523.5km
SGP4 propagation
Velocity
5.49km/s
Inclination
62.85°
Period
3.9 h
233.9 min
Perigee
376km
Apogee
12,015km
orbit freshOrbit updated 19 h ago · element epoch 11 Sept 2026 11:33 UTC (10.7 h old)· Metadata updated 19 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
- 12.341° N
- Longitude
- 90.366° W
- Altitude
- 6523.5 km
- Velocity
- 5.487 km/s
- past 45 min
- next 90 min
- first fix from server render · element epoch 11 Sept 2026 11:33 UTC
Mission
Mission & classification
Ownership
Operator & country
- Operator
- —
- SATCAT owner code
- US · United States
- Country
- United States US
Launch
Launch
- Launch date
- 27 Sept 2011
- COSPAR launch id
- 2011-052
- Launch site
- Pacific Spaceport Complex, Kodiak, Alaska
Objects from the same launch · 1
- MINOTAUR 4 R/B37819Rocket bodyDecayed
Change log
History
| Field | Change | Source | Date |
|---|---|---|---|
| Country Code | ∅ → US | Celestrak Satcat | 11 Sept 2026 18:53 UTC |
| Owner Code | ∅ → US | Celestrak Satcat | 11 Sept 2026 18:53 UTC |
| Orbit Class | ∅ → OTHER | 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 17 h ago
CelesTrak SATCATcommunity
Satellite catalog data courtesy of CelesTrak.
last sync 19 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% |
Quality flags
- UNKNOWN_OPERATORactive payload without resolved operator11 Sept 2026
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
- 37818
- COSPAR / international designator
- 2011-052A
- SatelliteIndex id
- sat_01M28X2SWVN8HVCRKVKG2Q7P7N
- Canonical slug
- tacsat-4-37818
Orbit class, mission type and constellation membership are derived by SatelliteIndex (Unknown) — see the methodology. Positions are propagated estimates, not tracking measurements; never use them for conjunction assessment.