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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
3158 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
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
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 COSMOS 209
1 3158U 68023A 26177.71044685 -.00000066 00000-0 16723-4 0 9990
2 3158 65.3298 169.7855 0049195 246.5856 113.0037 13.97935047972345Epoch: 2026-06-26T17:03Z
TLE epoch observation values (Epoch: 2026-06-26T17:03:02.607Z)
Latitude
-0.00003°
Longitude
-0.81042°
Altitude
917.067 km
Speed
7.387 km/s
True Right ascension
11h 19m 08s
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
14:10:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
935.317 km
Perigee altitude
863.713 km
Semi-major axis
7,277.652 km
Eccentricity
0.00492
Inclination
65.3298°
RAAN
169.7855°
Arg. of periapsis
246.5856°
True anomaly
113.52135°
Mean anomaly
113.0037°
Eccentric anomaly
113.26265°
Mean motion
3.49588 °/min
Orbital period
102.98 mins
BSTAR
0.000016723
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #23 in the year 1968 (1968-03-22 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-27 03:36:47.916Z | 301.359° NW | 2026-06-27 03:38:47.916Z | 321.443° NNW | 13.486° | 2026-06-27 03:41:47.916Z | 352.015° N |
| 9 mins | 2026-06-27 09:02:47.916Z | 355.498° N | 2026-06-27 09:06:47.916Z | 48.78° ENE | 26.217° | 2026-06-27 09:11:47.916Z | 105.917° ESE |
| 9 mins | 2026-06-27 10:48:47.916Z | 313.596° NW | 2026-06-27 10:52:47.916Z | 252.198° W | 37.814° | 2026-06-27 10:57:47.916Z | 174.183° S |
| 9 mins | 2026-06-28 00:04:47.916Z | 162.138° S | 2026-06-28 00:08:47.916Z | 109.952° ESE | 27.117° | 2026-06-28 00:13:47.916Z | 52.269° ENE |
| 9 mins | 2026-06-28 01:50:47.916Z | 244.398° WSW | 2026-06-28 01:54:47.916Z | 312.049° NW | 35.567° | 2026-06-28 01:59:47.916Z | 17.876° 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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|