COSMOS 1131
NORAD 11539
Payload
LEO
1979-084B
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🛰️ Orbital Parameters
Perigee
1410 km
Apogee
1483 km
Inclination
74.0°
Period
114.8 min
Mean Motion
12.54393257 rev/day
TLE Epoch
2026-05-08 12:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude1,447 km
Orbital Velocity25,706 km/h
Velocity7.14 km/s
Orbital Period115 minutes
Orbits / Day12.54
Eccentricity0.0047
Semi-Major Axis7,818 km
Est. Orbital LifetimeThousands of years
🚀 Launch & Identity
Country / Operator
🇷🇺 Russia (CIS)
Launch Date
1979-09-25
Launch Site
PKMTR
Int'l Designator
1979-084B
Object Type
Payload
RCS Size
Medium (0.1–1 m²)
📖 About This Object
COSMOS 1131 is an active satellite operated by Russia (CIS), launched on 1979-09-25 from PKMTR. With over 47 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 1,410 km and 1,483 km with an inclination of 74.0°. It travels at approximately 25,706 km/h (7.14 km/s), completing one full orbit every 115 minutes — that’s roughly 12.54 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is thousands of years. Orbital Radar tracks COSMOS 1131 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.
🌍 Orbit Context
COSMOS 1131 orbits in the upper reaches of Low Earth Orbit, above 1,000 km. At this altitude, atmospheric drag is negligible and objects can remain in orbit for thousands of years without active deorbiting. This region is used by satellite broadband constellations like OneWeb and by scientific missions that need stable, long-duration orbits away from the densest debris bands. The high inclination typical at this altitude provides near-global coverage.
🔗 Cosmos (Military/Government) Series
This satellite carries the Cosmos designation, used by Russia (and formerly the Soviet Union) as a generic identifier for military and government spacecraft. The Cosmos series encompasses reconnaissance, signals intelligence (SIGINT), early warning, navigation, communications and scientific payloads. Many Cosmos satellites have classified missions with limited publicly available information.
❓ Frequently Asked Questions
COSMOS 1131 orbits in Low Earth Orbit (LEO) at altitudes between 1,410 km (perigee) and 1,483 km (apogee), with an average altitude of approximately 1,447 km. It completes one orbit every 115 minutes, travelling at approximately 25,706 km/h (15,973 mph).
COSMOS 1131 is operated by Russia (CIS). It is catalogued by the U.S. Space Surveillance Network under NORAD ID 11539. You can track COSMOS 1131 in real time on Orbital Radar’s live tracker.
COSMOS 1131 was launched on 1979-09-25 from PKMTR. At its current altitude, the estimated remaining orbital lifetime is: thousands of years.
Yes — Orbital Radar tracks COSMOS 1131 (NORAD ID 11539) using the latest TLE (two-line element set) data from Space-Track and CelesTrak. Open the live tracker to see its current position, altitude, speed and orbital path updated in real time.
COSMOS 1131 travels at approximately 25,706 km/h (15,973 mph) — roughly 7.14 km/s. It completes 12.54 orbits per day, meaning the crew or instruments aboard (if any) would experience approximately 25 sunrises and sunsets every 24 hours.