COSMOS 1691, 16139
Orbit data source: Space-Track
COSMOS 1691, 16139 is a payload satellite owned by GUKOS (CIS) in LEO that was launched on Wed, 09 Oct 1985 UTC via a TSIKLON-3 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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
16139 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Defense Communications
Bus & Motor
STRELA-3, Unknown motor
Mass
225 kg wet, 225 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.8 m
Radar Cross Section
1.257 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 COSMOS 1691
1 16139U 85094B 25260.00977139 .00000043 00000-0 18269-3 0 9993
2 16139 82.6070 103.5151 0001242 80.0192 73.3191 12.62464935840761Epoch: 2025-09-17T00:14Z
TLE epoch observation values (Epoch: 2025-09-17T00:14:04.248Z)
Latitude
26.44182°
Longitude
-79.87593°
Altitude
1,415.585 km
Speed
7.155 km/s
True Right ascension
18h 39m 20s
True Declination
26° 18' 59"
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
20:54:55
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,411.074 km
Perigee altitude
1,409.139 km
Semi-major axis
7,788.243 km
Eccentricity
0.00012
Inclination
82.607°
RAAN
103.5151°
Arg. of periapsis
80.0192°
True anomaly
73.33273°
Mean anomaly
73.3191°
Eccentric anomaly
73.32592°
Mean motion
3.15779 °/min
Orbital period
114 mins
BSTAR
0.00018269
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 #94 in the year 1985 (1985-10-09 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 1691 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. |
|---|---|---|---|---|---|---|---|
| 15 mins | 2025-09-18 13:33:02.982Z | 159.548° S | 2025-09-18 13:40:02.982Z | 98.951° ESE | 37.019° | 2025-09-18 13:48:02.982Z | 18.877° NNE |
| 13 mins | 2025-09-18 15:30:02.982Z | 233.434° WSW | 2025-09-18 15:36:02.982Z | 293.172° NW | 29.158° | 2025-09-18 15:43:02.982Z | 350.984° N |
| 9 mins | 2025-09-18 23:37:02.982Z | 32.795° NE | 2025-09-18 23:41:02.982Z | 66.286° ENE | 18.278° | 2025-09-18 23:46:02.982Z | 105.113° ESE |
| 15 mins | 2025-09-19 01:30:02.982Z | 350.843° N | 2025-09-19 01:37:02.982Z | 236.567° WSW | 44.827° | 2025-09-19 01:45:02.982Z | 177.871° S |
| 6 mins | 2025-09-19 03:28:02.982Z | 302.562° NW | 2025-09-19 03:30:02.982Z | 287.111° WNW | 14.313° | 2025-09-19 03:34:02.982Z | 256.755° W |
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 |
|---|
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 ascending order |
|---|