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COSMOS 2172

NORAD 21789 Payload GEO 1991-079A ● Active
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Altitude (km)
Speed (km/s)
Latitude
Longitude
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🛰️ Orbital Parameters
Perigee
35779 km
Apogee
35807 km
Inclination
13.3°
Period
1436.4 min
Mean Motion
1.00249347 rev/day
TLE Epoch
2026-06-19 05:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude35,793 km
Orbital Velocity11,069 km/h
Velocity3.07 km/s
Orbital Period~24 hours (geosynchronous)
Orbits / Day1.00
Eccentricity0.0003
Semi-Major Axis42,164 km
Est. Orbital LifetimePermanent — geostationary orbit, no atmospheric drag
🚀 Launch & Identity
Country / Operator
🇷🇺 Russia (CIS)
Launch Date
1991-11-22
Launch Site
Baikonur, Kazakhstan
Int'l Designator
1991-079A
Object Type
Payload
RCS Size
Large (>1 m²)
📖 About This Object
COSMOS 2172 is an active satellite operated by Russia (CIS), launched on 1991-11-22 from Baikonur, Kazakhstan. With over 35 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Geostationary Orbit (GEO) at altitudes between 35,779 km and 35,807 km with an inclination of 13.3°. It travels at approximately 11,069 km/h (3.07 km/s), completing one full orbit every ~24 hours (geosynchronous) — that’s roughly 1.00 orbits per day. At geostationary altitude, there is no meaningful atmospheric drag — this object will remain in orbit indefinitely unless actively deorbited. Orbital Radar tracks COSMOS 2172 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 2172 occupies geostationary orbit at approximately 35,786 km above the equator, where its orbital period matches the Earth’s 24-hour rotation. From the ground, it appears to hover over a fixed point — ideal for broadcast television, weather monitoring and wideband communications. With an inclination of 13.3°, it traces a small figure-of-eight pattern relative to the equator rather than remaining perfectly stationary, which can indicate aging stationkeeping fuel or a deliberate inclined-orbit strategy. Within ±50 km of COSMOS 2172’s average altitude, there are currently 715 active payloads and 60 tracked debris or rocket body fragments — notable neighbours include ASTRA 1N, GOES 16, TDRS 13. Russia (CIS) operates approximately 1,285 active satellites in total, of which 124 share a similar altitude band with COSMOS 2172.
🔗 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 2172 orbits at approximately 35,793 km altitude, where the orbital period matches the Earth’s 24-hour rotation. This means it stays above the same point on the equator at all times. Its actual speed is still 11,069 km/h — it just keeps pace with the ground below. With an inclination of 13.3°, it actually traces a small figure-of-eight pattern rather than remaining perfectly fixed. Learn more about geostationary orbits.
COSMOS 2172 is operated by Russia (CIS). It is catalogued by the U.S. Space Surveillance Network under NORAD ID 21789. You can track COSMOS 2172 in real time on Orbital Radar’s live tracker or browse all operators in the operator directory.
COSMOS 2172 was launched on 1991-11-22 from Baikonur, Kazakhstan, the world’s first and largest operational space launch facility, located in Kazakhstan. View the full satellite launch log.
Yes — Orbital Radar tracks COSMOS 2172 (NORAD ID 21789) 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. You can also browse the satellite directory to find other tracked objects.
COSMOS 2172 travels at approximately 11,069 km/h (6,878 mph) — roughly 3.07 km/s. Despite this high speed, it appears stationary from the ground because it matches the Earth’s rotation. Geostationary satellites are actually slower than LEO satellites because orbital velocity decreases with altitude.