COSMOS 203, 3129
Orbit data source: Space-Track
COSMOS 203, 3129 is a payload satellite owned by OKB-10 (CIS) in LEO that was launched on Tue, 20 Feb 1968 UTC via a KOSMOS 11K65M launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). 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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3129 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
OKB-10
Mission
Spacecraft
Bus & Motor
KAUR-1 11F621, Unknown motor
Mass
800 kg wet, 800 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 8 hours ago
TLE from 8 hours ago
0 COSMOS 203
1 3129U 68011A 26151.21433980 .00000041 00000-0 15389-3 0 9990
2 3129 74.0502 119.2112 0012793 316.1154 142.4262 13.18304133803745Epoch: 2026-05-31T05:08Z
TLE epoch observation values (Epoch: 2026-05-31T05:08:38.958Z)
Latitude
71.99895°
Longitude
-87.72635°
Altitude
1,210.946 km
Speed
7.252 km/s
True Right ascension
15h 52m 37s
True Declination
71° 54' 13"
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
22:27:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,198.64 km
Perigee altitude
1,179.279 km
Semi-major axis
7,567.096 km
Eccentricity
0.00128
Inclination
74.0502°
RAAN
119.2112°
Arg. of periapsis
316.1154°
True anomaly
142.51548°
Mean anomaly
142.4262°
Eccentric anomaly
142.47085°
Mean motion
3.29723 °/min
Orbital period
109.18 mins
BSTAR
0.00015389
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Other satellites on launch #11 in the year 1968 (1968-02-20 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 203 Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-05-31 21:11:46.549Z | 106.485° ESE | 2026-05-31 21:13:46.549Z | 89.659° E | 12.493° | 2026-05-31 21:15:46.549Z | 72.78° E |
| 13 mins | 2026-05-31 22:57:46.549Z | 192.86° SSW | 2026-05-31 23:03:46.549Z | 139.271° SSE | 44.692° | 2026-05-31 23:10:46.549Z | 20.803° NNE |
| 8 mins | 2026-06-01 00:52:46.549Z | 273.516° WNW | 2026-06-01 00:56:46.549Z | 312.371° NW | 18.772° | 2026-06-01 01:00:46.549Z | 347.923° N |
| 13 mins | 2026-06-01 08:32:46.549Z | 352.227° N | 2026-06-01 08:38:46.549Z | 60.78° ENE | 38.746° | 2026-06-01 08:45:46.549Z | 141.366° SSE |
| 10 mins | 2026-06-01 10:25:46.549Z | 308.325° NW | 2026-06-01 10:29:46.549Z | 265.694° W | 25.414° | 2026-06-01 10:35:46.549Z | 209.451° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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