COSMOS 2141 (GLONASS), 21218
Orbit data source: Space-Track
COSMOS 2141 (GLONASS), 21218 is a payload satellite owned by UNKS RF (CIS) in MEO that was launched on Thu, 04 Apr 1991 UTC via a PROTON-K/DM-2 launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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21218 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Polyot
Mission
Non-operational Defense Navigation
Bus & Motor
URAGAN, Unknown motor
Mass
1,300 kg wet, ~1,200 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 2 Pan, 4.2 m
Radar Cross Section
14.707 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 4 days ago
TLE from 4 days ago
0 COSMOS 2141 (GLONASS)
1 21218U 91025C 26169.57702228 -.00000052 00000-0 00000-0 0 9996
2 21218 64.3438 304.1428 0005549 224.9055 133.2303 2.13103050273996Epoch: 2026-06-18T13:50Z
TLE epoch observation values (Epoch: 2026-06-18T13:50:54.724Z)
Latitude
-1.63619°
Longitude
-171.20431°
Altitude
19,140.272 km
Speed
3.952 km/s
True Right ascension
20h 13m 22s
True Declination
-1° 38' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
00:39:44
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
19,143.596 km
Perigee altitude
19,115.287 km
Semi-major axis
25,507.578 km
Eccentricity
0.00055
Inclination
64.3438°
RAAN
304.1428°
Arg. of periapsis
224.9055°
True anomaly
133.27661°
Mean anomaly
133.2303°
Eccentric anomaly
133.25346°
Mean motion
0.53277 °/min
Orbital period
675.71 mins
BSTAR
0
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Other satellites on launch #25 in the year 1991 (1991-04-04 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.COSMOS 2141 (GLONASS) Visibility forecast
Loading observer location...
Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 187 mins | 2026-06-22 21:50:12.109Z | 333.911° NNW | 2026-06-22 23:22:12.109Z | 293.829° NW | 29.643° | 2026-06-23 00:57:12.109Z | 245.088° WSW |
| 225 mins | 2026-06-23 06:04:12.109Z | 136.04° SSE | 2026-06-23 07:57:12.109Z | 75.834° E | 36.847° | 2026-06-23 09:49:12.109Z | 30.083° NE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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