COSMOS 1275 DEB, 39966
Orbit data source: Space-Track
COSMOS 1275 DEB, 39966 is space debris in LEO originally from a launch on Thu, 04 Jun 1981 UTC launched from the Plesetsk Missile And Space Complex (PKMTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
39966 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
Unknown
Mission
Spacecraft
Bus & Motor
Unknown
Mass
Unknown
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Unknown shape, 0.1 m
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 COSMOS 1275 DEB
1 39966U 81053PC 25343.75739737 .00003646 00000-0 23250-2 0 9998
2 39966 82.7045 151.2186 0040771 205.0090 170.8981 14.02947159586566Epoch: 2025-12-09T18:10Z
TLE epoch observation values (Epoch: 2025-12-09T18:10:39.132Z)
Latitude
15.82733°
Longitude
161.88705°
Altitude
915.11 km
Speed
7.381 km/s
True Right ascension
10h 13m 09s
True Declination
15° 44' 21"
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
18:40:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
910.322 km
Perigee altitude
851.132 km
Semi-major axis
7,258.864 km
Eccentricity
0.00408
Inclination
82.7045°
RAAN
151.2186°
Arg. of periapsis
205.009°
True anomaly
170.97164°
Mean anomaly
170.8981°
Eccentric anomaly
170.93491°
Mean motion
3.50946 °/min
Orbital period
102.58 mins
BSTAR
0.002325
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 #53 in the year 1981 (1981-06-04 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 1275 DEB 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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-12-10 22:04:43.245Z | 25.193° NE | 2025-12-10 22:08:43.245Z | 75.835° E | 21.566° | 2025-12-10 22:12:43.245Z | 122.527° SE |
| 8 mins | 2025-12-10 23:48:43.245Z | 329.622° NNW | 2025-12-10 23:51:43.245Z | 280.446° WNW | 34.585° | 2025-12-10 23:56:43.245Z | 201.676° SSW |
| 9 mins | 2025-12-11 11:18:43.245Z | 148.326° SSE | 2025-12-11 11:22:43.245Z | 79.976° E | 32.968° | 2025-12-11 11:27:43.245Z | 22.418° NNE |
| 8 mins | 2025-12-11 13:02:43.245Z | 243.606° WSW | 2025-12-11 13:05:43.245Z | 284.479° WNW | 24.316° | 2025-12-11 13:10:43.245Z | 343.381° 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 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 |
|---|