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: 10 hours ago
TLE from 10 hours ago
0 COSMOS 203
1 03129U 68011A 25258.58987587 -.00000179 00000-0 -40866-3 0 9996
2 03129 74.0522 146.2648 0011863 35.6672 47.8936 13.18293985769790Epoch: 2025-09-15T14:09Z
TLE epoch observation values (Epoch: 2025-09-15T14:09:25.275Z)
Latitude
72.94828°
Longitude
7.08138°
Altitude
1,197.428 km
Speed
7.265 km/s
True Right ascension
14h 16m 54s
True Declination
72° 51' 26"
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
16:27:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,197.975 km
Perigee altitude
1,180.021 km
Semi-major axis
7,567.135 km
Eccentricity
0.00119
Inclination
74.0522°
RAAN
146.2648°
Arg. of periapsis
35.6672°
True anomaly
47.99455°
Mean anomaly
47.8936°
Eccentric anomaly
47.94407°
Mean motion
3.2972 °/min
Orbital period
109.18 mins
BSTAR
-0.00040866
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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 | 2025-09-16 03:02:59.743Z | 354.98° N | 2025-09-16 03:09:59.743Z | 70.462° E | 32.739° | 2025-09-16 03:15:59.743Z | 129.366° SE |
| 11 mins | 2025-09-16 04:55:59.743Z | 318.185° NNW | 2025-09-16 05:00:59.743Z | 258.817° W | 31.86° | 2025-09-16 05:06:59.743Z | 198.118° SSW |
| 12 mins | 2025-09-16 17:09:59.743Z | 171.756° S | 2025-09-16 17:14:59.743Z | 111.006° ESE | 38.653° | 2025-09-16 17:21:59.743Z | 28.932° NE |
| 11 mins | 2025-09-16 19:01:59.743Z | 248.988° W | 2025-09-16 19:06:59.743Z | 301.479° NW | 26.394° | 2025-09-16 19:12:59.743Z | 359.331° N |
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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