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 03129U 68011A 26175.19610306 -.00000103 00000-0 -21473-3 0 9994
2 03129 74.0525 83.1825 0012977 277.4208 195.1753 13.18304646806903Epoch: 2026-06-24T04:42Z
TLE epoch observation values (Epoch: 2026-06-24T04:42:23.304Z)
Latitude
62.71394°
Longitude
-113.21861°
Altitude
1,211.088 km
Speed
7.25 km/s
True Right ascension
15h 18m 56s
True Declination
62° 34' 55"
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
23:54:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,198.777 km
Perigee altitude
1,179.137 km
Semi-major axis
7,567.094 km
Eccentricity
0.0013
Inclination
74.0525°
RAAN
83.1825°
Arg. of periapsis
277.4208°
True anomaly
195.13643°
Mean anomaly
195.1753°
Eccentric anomaly
195.15586°
Mean motion
3.29723 °/min
Orbital period
109.18 mins
BSTAR
-0.00021473
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-06-24 18:48:15.817Z | 185.343° SSW | 2026-06-24 18:54:15.817Z | 129.822° SE | 42.777° | 2026-06-24 19:01:15.817Z | 24.54° NE |
| 10 mins | 2026-06-24 20:42:15.817Z | 260.647° W | 2026-06-24 20:47:15.817Z | 310.386° NW | 21.876° | 2026-06-24 20:52:15.817Z | 354.711° N |
| 12 mins | 2026-06-25 04:24:15.817Z | 358.642° N | 2026-06-25 04:29:15.817Z | 56.347° ENE | 35.017° | 2026-06-25 04:36:15.817Z | 134.069° SE |
| 10 mins | 2026-06-25 06:16:15.817Z | 313.958° NW | 2026-06-25 06:21:15.817Z | 254.314° W | 29.296° | 2026-06-25 06:26:15.817Z | 204.837° SW |
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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