COSMOS 1275 DEB, 39939
Orbit data source: Space-Track
COSMOS 1275 DEB, 39939 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.
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39939 intel report (Beta)
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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 week ago
TLE from 1 week ago
0 COSMOS 1275 DEB
1 39939U 81053MZ 26129.69896286 .00000471 00000-0 44324-3 0 9996
2 39939 82.8162 121.4197 0067797 263.9564 95.3865 13.78622661599447Epoch: 2026-05-09T16:46Z
TLE epoch observation values (Epoch: 2026-05-09T16:46:30.391Z)
Latitude
-0.00002°
Longitude
2.28041°
Altitude
976.689 km
Speed
7.361 km/s
True Right ascension
08h 05m 40s
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
02:52:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,015.715 km
Perigee altitude
916.134 km
Semi-major axis
7,344.062 km
Eccentricity
0.00678
Inclination
82.8162°
RAAN
121.4197°
Arg. of periapsis
263.9564°
True anomaly
96.15933°
Mean anomaly
95.3865°
Eccentric anomaly
95.77298°
Mean motion
3.44857 °/min
Orbital period
104.39 mins
BSTAR
0.00044324
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Other satellites on launch #53 in the year 1981 (1981-06-04 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 1275 DEB 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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-05-18 22:06:06.746Z | 140.108° SSE | 2026-05-18 22:11:06.746Z | 85.931° E | 25.166° | 2026-05-18 22:16:06.746Z | 31.68° NE |
| 11 mins | 2026-05-18 23:51:06.746Z | 215.979° SW | 2026-05-18 23:56:06.746Z | 283.746° WNW | 34.856° | 2026-05-19 00:02:06.746Z | 354.159° N |
| 7 mins | 2026-05-19 09:03:06.746Z | 31.629° NE | 2026-05-19 09:06:06.746Z | 66.331° ENE | 20.702° | 2026-05-19 09:10:06.746Z | 112.873° SE |
| 10 mins | 2026-05-19 10:47:06.746Z | 340.255° N | 2026-05-19 10:52:06.746Z | 264.84° W | 38.927° | 2026-05-19 10:57:06.746Z | 195.53° SSW |
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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