COSMOS 951
NORAD 10352
Payload
LEO
1977-087A
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🛰️ Orbital Parameters
Perigee
958 km
Apogee
1010 km
Inclination
83.0°
Period
104.8 min
Mean Motion
13.74340440 rev/day
TLE Epoch
2026-05-08 13:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude984 km
Orbital Velocity26,502 km/h
Velocity7.36 km/s
Orbital Period105 minutes
Orbits / Day13.74
Eccentricity0.0035
Semi-Major Axis7,355 km
Est. Orbital Lifetime~100–500 years
🚀 Launch & Identity
Country / Operator
🇷🇺 Russia (CIS)
Launch Date
1977-09-13
Launch Site
PKMTR
Int'l Designator
1977-087A
Object Type
Payload
RCS Size
Large (>1 m²)
📖 About This Object
COSMOS 951 is an active satellite operated by Russia (CIS), launched on 1977-09-13 from PKMTR. With over 49 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 958 km and 1,010 km with an inclination of 83.0°. It travels at approximately 26,502 km/h (7.36 km/s), completing one full orbit every 105 minutes — that’s roughly 13.74 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~100–500 years. Orbital Radar tracks COSMOS 951 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 951 occupies the mid-LEO band between 600 and 1,000 km, where atmospheric drag is minimal but radiation exposure remains low. This altitude range balances orbital longevity (decades to centuries) with reasonable ground coverage, making it popular for remote sensing constellations, scientific instruments and weather satellites. Debris concerns are significant here because objects persist far longer than in lower orbits.
❓ Frequently Asked Questions
COSMOS 951 orbits in Low Earth Orbit (LEO) at altitudes between 958 km (perigee) and 1,010 km (apogee), with an average altitude of approximately 984 km. It completes one orbit every 105 minutes, travelling at approximately 26,502 km/h (16,468 mph).
COSMOS 951 is operated by Russia (CIS). It is catalogued by the U.S. Space Surveillance Network under NORAD ID 10352. You can track COSMOS 951 in real time on Orbital Radar’s live tracker.
COSMOS 951 was launched on 1977-09-13 from PKMTR. At its current altitude, the estimated remaining orbital lifetime is: ~100–500 years.
Yes — Orbital Radar tracks COSMOS 951 (NORAD ID 10352) 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 951 travels at approximately 26,502 km/h (16,468 mph) — roughly 7.36 km/s. It completes 13.74 orbits per day, meaning the crew or instruments aboard (if any) would experience approximately 27 sunrises and sunsets every 24 hours.