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SatelliteIndex

Satellite · NORAD 12376 · COSPAR 1981-031A

COSMOS 1261

UnknownPayloadHEOMilitary derived

Altitude now

—

no element set

Velocity

—

Inclination

69.04°

Period

11.9 h

717.0 min

Perigee

4,752km

Apogee

35,563km

orbit unavailableNo orbital element set on file.· Metadata updated 9 h 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
Military
Object type
Payload
Radar cross-section
8.5 m²
Constellation membership derived
Kosmos (Russian military / government) via name_pattern

CelesTrak groups

Not listed in any CelesTrak group.

Aliases

  • COSMOS 1261Celestrak Satcat

Ownership

Operator & country

Operator
Russian Ministry of Defence
SATCAT owner code
CIS · Commonwealth of Independent States (former USSR)
Country
Russia RU

Launch

Launch

Launch page →
Launch date
31 Mar 1981
COSPAR launch id
1981-031
Launch site
Plesetsk Cosmodrome

Objects from the same launch · 13

All objects from launch 1981-031 →

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
12376
COSPAR / international designator
1981-031A
SatelliteIndex id
sat_01M28X3JN02E0SDVFV2PJHB7TA
Canonical slug
cosmos-1261-12376

Orbit class, mission type and constellation membership are derived by SatelliteIndex (Military) — see the methodology. Positions are propagated estimates, not tracking measurements; never use them for conjunction assessment.