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: 5 hours ago
TLE from 5 hours ago
0 COSMOS 203
1 3129U 68011A 25290.16506409 .00000052 00000-0 18199-3 0 9998
2 3129 74.0487 98.8231 0012572 341.5615 139.6161 13.18295636773952Epoch: 2025-10-17T03:57Z
TLE epoch observation values (Epoch: 2025-10-17T03:57:41.537Z)
Latitude
55.36893°
Longitude
169.17057°
Altitude
1,207.3 km
Speed
7.252 km/s
True Right ascension
16h 58m 01s
True Declination
55° 13' 03"
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
03:42:45
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,198.506 km
Perigee altitude
1,179.479 km
Semi-major axis
7,567.129 km
Eccentricity
0.00126
Inclination
74.0487°
RAAN
98.8231°
Arg. of periapsis
341.5615°
True anomaly
139.70933°
Mean anomaly
139.6161°
Eccentric anomaly
139.66273°
Mean motion
3.29721 °/min
Orbital period
109.18 mins
BSTAR
0.00018199
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-10-17 10:46:45.164Z | 113.847° SE | 2025-10-17 10:49:45.164Z | 88.733° E | 13.055° | 2025-10-17 10:52:45.164Z | 63.936° ENE |
| 13 mins | 2025-10-17 12:33:45.164Z | 194.391° SSW | 2025-10-17 12:39:45.164Z | 135.194° SSE | 44.892° | 2025-10-17 12:46:45.164Z | 20.126° NNE |
| 8 mins | 2025-10-17 14:28:45.164Z | 274.95° WNW | 2025-10-17 14:31:45.164Z | 302.956° NW | 18.159° | 2025-10-17 14:36:45.164Z | 348.296° N |
| 13 mins | 2025-10-17 22:08:45.164Z | 351.926° N | 2025-10-17 22:14:45.164Z | 64.27° ENE | 39.44° | 2025-10-17 22:21:45.164Z | 142.986° SSE |
| 9 mins | 2025-10-18 00:01:45.164Z | 306.715° NW | 2025-10-18 00:05:45.164Z | 263.985° W | 24.632° | 2025-10-18 00:10:45.164Z | 215.118° 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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