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SatelliteIndex

Satellite · NORAD 18336 · COSPAR 1987-074C

COSMOS 1877

UnknownPayloadLEOMilitary derived

Altitude now

—

no element set

Velocity

—

Inclination

82.56°

Period

114.0 min

114.0 min

Perigee

1,406km

Apogee

1,409km

orbit unavailableNo orbital element set on file.· Metadata updated 22 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
1.0 m²
Constellation membership derived
Kosmos (Russian military / government) via name_pattern

CelesTrak groups

Not listed in any CelesTrak group.

Aliases

  • COSMOS 1877Celestrak 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
07 Sept 1987
COSPAR launch id
1987-074
Launch site
Plesetsk Cosmodrome

Objects from the same launch · 6

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
18336
COSPAR / international designator
1987-074C
SatelliteIndex id
sat_01M28X3JP1D693V3WCE2XM2GNM
Canonical slug
cosmos-1877-18336

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.