COSMOS 1275 DEB, 12739
Orbit data source: Space-Track
COSMOS 1275 DEB, 12739 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
12739 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Create New Watchlist
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: 10 hours ago
TLE from 10 hours ago
0 COSMOS 1275 DEB
1 12739U 81053CG 26101.63438002 .00003247 00000-0 91139-3 0 9997
2 12739 82.9334 328.7000 0007742 15.0939 345.0486 14.45747582295946Epoch: 2026-04-11T15:13Z
TLE epoch observation values (Epoch: 2026-04-11T15:13:30.433Z)
Latitude
-0.00003°
Longitude
-99.52768°
Altitude
737.245 km
Speed
7.489 km/s
True Right ascension
21h 54m 47s
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
07:33:37
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
742.132 km
Perigee altitude
731.115 km
Semi-major axis
7,114.76 km
Eccentricity
0.00077
Inclination
82.9334°
RAAN
328.7°
Arg. of periapsis
15.0939°
True anomaly
345.02569°
Mean anomaly
345.0486°
Eccentric anomaly
345.03715°
Mean motion
3.61662 °/min
Orbital period
99.54 mins
BSTAR
0.00091139
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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-04-12 01:47:03.602Z | 42.954° NE | 2026-04-12 01:49:03.602Z | 69.159° E | 15.197° | 2026-04-12 01:52:03.602Z | 106.511° ESE |
| 8 mins | 2026-04-12 03:26:03.602Z | 340.234° N | 2026-04-12 03:30:03.602Z | 256.926° W | 39.176° | 2026-04-12 03:34:03.602Z | 192.633° SSW |
| 4 mins | 2026-04-12 14:38:03.602Z | 109.656° ESE | 2026-04-12 14:40:03.602Z | 81.459° E | 16.386° | 2026-04-12 14:42:03.602Z | 54.539° ENE |
| 8 mins | 2026-04-12 16:16:03.602Z | 211.3° SW | 2026-04-12 16:20:03.602Z | 292.432° WNW | 36.114° | 2026-04-12 16:24:03.602Z | 353.182° 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 |
|---|