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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Edit Public Description
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: 15 hours ago
TLE from 15 hours ago
0 COSMOS 203
1 3129U 68011A 25321.74194286 .00000186 00000-0 52389-3 0 9990
2 3129 74.0542 51.3825 0013177 289.8034 237.1761 13.18296766778116Epoch: 2025-11-17T17:48Z
TLE epoch observation values (Epoch: 2025-11-17T17:48:23.863Z)
Latitude
12.60148°
Longitude
-96.3986°
Altitude
1,198.368 km
Speed
7.253 km/s
True Right ascension
15h 10m 57s
True Declination
12° 31' 58"
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
05:32:25
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,198.959 km
Perigee altitude
1,179.016 km
Semi-major axis
7,567.124 km
Eccentricity
0.00132
Inclination
74.0542°
RAAN
51.3825°
Arg. of periapsis
289.8034°
True anomaly
237.04932°
Mean anomaly
237.1761°
Eccentric anomaly
237.1127°
Mean motion
3.29721 °/min
Orbital period
109.18 mins
BSTAR
0.00052389
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-11-18 09:34:18.243Z | 283.836° WNW | 2025-11-18 09:37:18.243Z | 308.661° NW | 13.694° | 2025-11-18 09:41:18.243Z | 342.084° N |
| 6 mins | 2025-11-18 15:24:18.243Z | 23.29° NE | 2025-11-18 15:27:18.243Z | 49.463° ENE | 14.741° | 2025-11-18 15:30:18.243Z | 75.424° E |
| 13 mins | 2025-11-18 17:14:18.243Z | 346.06° N | 2025-11-18 17:20:18.243Z | 96.57° ESE | 43.877° | 2025-11-18 17:27:18.243Z | 155.877° SSE |
| 7 mins | 2025-11-18 19:07:18.243Z | 297.355° NW | 2025-11-18 19:10:18.243Z | 269.359° W | 17.931° | 2025-11-18 19:14:18.243Z | 232.963° WSW |
| 6 mins | 2025-11-19 05:32:18.243Z | 114.52° SE | 2025-11-19 05:35:18.243Z | 86.459° E | 16.271° | 2025-11-19 05:38:18.243Z | 60.359° ENE |
| 13 mins | 2025-11-19 07:19:18.243Z | 202.207° SSW | 2025-11-19 07:25:18.243Z | 301.027° NW | 44.651° | 2025-11-19 07:32:18.243Z | 17.094° NNE |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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