COSMOS 81, 1571
Orbit data source: Space-Track
COSMOS 81, 1571 is a payload satellite owned by OKB-10 (CIS) in LEO that was launched on Fri, 03 Sep 1965 UTC via a KOSMOS 65S3 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
1571 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
OKB-10
Mission
Spacecraft
Bus & Motor
STRELA-1 11F610, Unknown motor
Mass
50 kg wet, 50 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 COSMOS 81
1 01571U 65070B 25339.31222125 -.00000080 00000-0 10199-3 0 9994
2 01571 56.0626 3.5204 0087608 186.5166 186.9462 12.48865134748408Epoch: 2025-12-05T07:29Z
TLE epoch observation values (Epoch: 2025-12-05T07:29:35.915Z)
Latitude
11.02323°
Longitude
-175.73986°
Altitude
1,537.807 km
Speed
7.068 km/s
True Right ascension
00h 44m 03s
True Declination
10° 57' 55"
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
23:11:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,537.816 km
Perigee altitude
1,400.32 km
Semi-major axis
7,847.205 km
Eccentricity
0.00876
Inclination
56.0626°
RAAN
3.5204°
Arg. of periapsis
186.5166°
True anomaly
186.8261°
Mean anomaly
186.9462°
Eccentric anomaly
186.88602°
Mean motion
3.12227 °/min
Orbital period
115.3 mins
BSTAR
0.00010199
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 #70 in the year 1965 (1965-09-03 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 81 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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2025-12-06 02:42:56.131Z | 181.611° SSW | 2025-12-06 02:50:56.131Z | 121.086° SE | 30.201° | 2025-12-06 02:58:56.131Z | 59.264° ENE |
| 17 mins | 2025-12-06 04:42:56.131Z | 236.597° WSW | 2025-12-06 04:50:56.131Z | 313.681° NW | 43.332° | 2025-12-06 04:59:56.131Z | 43.351° NE |
| 14 mins | 2025-12-06 06:46:56.131Z | 290.173° WNW | 2025-12-06 06:52:56.131Z | 341.244° N | 28.115° | 2025-12-06 07:00:56.131Z | 44.952° NE |
| 13 mins | 2025-12-06 08:49:56.131Z | 318.049° NNW | 2025-12-06 08:56:56.131Z | 17.689° NNE | 26.641° | 2025-12-06 09:02:56.131Z | 66.757° ENE |
| 16 mins | 2025-12-06 10:50:56.131Z | 319.037° NNW | 2025-12-06 10:58:56.131Z | 44.276° NE | 41.391° | 2025-12-06 11:06:56.131Z | 117.542° SE |
| 13 mins | 2025-12-06 12:52:56.131Z | 296.447° NW | 2025-12-06 12:58:56.131Z | 237.415° WSW | 32.921° | 2025-12-06 13:05:56.131Z | 174.734° S |
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 |
|---|