COSMOS 209, 3158
Orbit data source: Space-Track
COSMOS 209, 3158 is a payload satellite owned by TSKBM (CIS) in LEO that was launched on Fri, 22 Mar 1968 UTC via a TSIKLON-2A launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). 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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3158 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
TSKBM/KB1
Mission
Spacecraft
Bus & Motor
US-A REACTOR, Unknown motor
Mass
3,800 kg wet, 1,140 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
CYL, 1.1 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 22 hours ago
TLE from 22 hours ago
0 COSMOS 209
1 03158U 68023A 26259.40893593 -.00000068 00000-0 14911-4 0 9996
2 03158 65.3327 315.9139 0044737 220.8941 138.8770 13.97938976983766Epoch: 2026-09-16T09:48Z
TLE epoch observation values (Epoch: 2026-09-16T09:48:52.064Z)
Latitude
-0.00006°
Longitude
173.33599°
Altitude
927.505 km
Speed
7.376 km/s
True Right ascension
21h 03m 39s
True Declination
0° 00' 00"
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
00:40:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
932.059 km
Perigee altitude
866.943 km
Semi-major axis
7,277.638 km
Eccentricity
0.00447
Inclination
65.3327°
RAAN
315.9139°
Arg. of periapsis
220.8941°
True anomaly
139.21274°
Mean anomaly
138.877°
Eccentric anomaly
139.04501°
Mean motion
3.49589 °/min
Orbital period
102.98 mins
BSTAR
0.000014911
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Other satellites on launch #23 in the year 1968 (1968-03-22 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 209 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-09-17 13:50:46.788Z | 346.869° N | 2026-09-17 13:54:46.788Z | 52.621° ENE | 46.816° | 2026-09-17 13:59:46.788Z | 123.506° SE |
| 8 mins | 2026-09-17 15:36:46.788Z | 299.626° NW | 2026-09-17 15:40:46.788Z | 246.677° WSW | 28.325° | 2026-09-17 15:44:46.788Z | 197.699° SSW |
| 10 mins | 2026-09-18 04:51:46.788Z | 187.312° SSW | 2026-09-18 04:56:46.788Z | 101.491° ESE | 54.09° | 2026-09-18 05:01:46.788Z | 41.13° NE |
| 9 mins | 2026-09-18 06:38:46.788Z | 262.98° W | 2026-09-18 06:42:46.788Z | 313.473° NW | 28.686° | 2026-09-18 06:47:46.788Z | 11.172° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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