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SatelliteIndex

Satellite · NORAD 21552 · COSPAR 1991-047A

NAVSTAR 23 (USA 71)

UnknownPayloadMEONavigation derived

Altitude now

—

no element set

Velocity

—

Inclination

56.51°

Period

12.5 h

750.6 min

Perigee

20,886km

Apogee

21,074km

orbit unavailableNo orbital element set on file.· Metadata updated 2 d ago

Live position

Live position

Live position unavailable — no public orbital element set exists for this object (it may be classified, untracked or too small to catalogue).

Mission

Mission & classification

Mission type derived
Navigation
Object type
Payload
SATCAT ops status
Non-operational [-]
Radar cross-section
3.9 m²
Constellation membership derived
GPS (NAVSTAR) via name_pattern

CelesTrak groups

Not listed in any CelesTrak group.

Aliases

  • NAVSTAR 23 (USA 71)Celestrak Satcat

Ownership

Operator & country

Operator
United States Space Force
SATCAT owner code
US · United States
Country
United States US

Launch

Launch

Launch page →
Launch date
04 Jul 1991
COSPAR launch id
1991-047
Launch site
Cape Canaveral / Kennedy Space Center (Eastern Range), Florida

Objects from the same launch · 5

Change log

History

No changes recorded since first ingestion on 11 Sept 2026 18:54 UTC. Status, orbit class, name and ownership changes are logged here as sources are re-ingested.

Regulatory

UN registration

UN Register of Objects Launched into Outer Space (UNOOSA) — connector planned, not yet ingested; registration unavailable

Transparency

Sources & provenance

All sources →

No source is linked to this record yet — the catalogue row exists but no provenance entry has been written for it.

Field provenance

No field-level provenance recorded.

Timeline

Events

All 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
21552
COSPAR / international designator
1991-047A
SatelliteIndex id
sat_01M28X3JPKDVSSD2Y60ZHP1X0A
Canonical slug
navstar-23-usa-71-21552

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.