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
Defense Geodetic
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
Cyl + 1 Rod, 8.5 m
Radar Cross Section
6.283 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 COSMOS 203
1 03129U 68011A 25261.10824269 -.00000138 00000-0 -30340-3 0 9996
2 03129 74.0518 142.4816 0011925 31.3056 119.7701 13.18293579770125Epoch: 2025-09-18T02:35Z
TLE epoch observation values (Epoch: 2025-09-18T02:35:52.168Z)
Latitude
27.64494°
Longitude
-82.32487°
Altitude
1,198.705 km
Speed
7.255 km/s
True Right ascension
20h 55m 40s
True Declination
27° 30' 43"
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
18:53:02
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,198.024 km
Perigee altitude
1,179.976 km
Semi-major axis
7,567.137 km
Eccentricity
0.00119
Inclination
74.0518°
RAAN
142.4816°
Arg. of periapsis
31.3056°
True anomaly
119.88863°
Mean anomaly
119.7701°
Eccentric anomaly
119.82937°
Mean motion
3.2972 °/min
Orbital period
109.18 mins
BSTAR
-0.0003034
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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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2025-09-19 02:04:34.065Z | 3.359° NNE | 2025-09-19 02:10:34.065Z | 60.967° ENE | 24.086° | 2025-09-19 02:15:34.065Z | 108.425° ESE |
| 12 mins | 2025-09-19 03:56:34.065Z | 330.996° NNW | 2025-09-19 04:02:34.065Z | 239.859° WSW | 40.974° | 2025-09-19 04:08:34.065Z | 179.803° S |
| 11 mins | 2025-09-19 16:11:34.065Z | 151.99° SSE | 2025-09-19 16:16:34.065Z | 97.913° ESE | 28.774° | 2025-09-19 16:22:34.065Z | 38.678° NE |
| 12 mins | 2025-09-19 18:02:34.065Z | 230.919° WSW | 2025-09-19 18:07:34.065Z | 292.613° NW | 35.417° | 2025-09-19 18:14:34.065Z | 7.575° NNE |
| 9 mins | 2025-09-20 01:46:34.065Z | 16.011° NNE | 2025-09-20 01:50:34.065Z | 56.473° ENE | 21.507° | 2025-09-20 01:55:34.065Z | 102.539° ESE |
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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