COSMOS 252 DEB, 3900
Orbit data source: Space-Track
COSMOS 252 DEB, 3900 is space debris in LEO originally from a launch on Fri, 01 Nov 1968 UTC launched from the Tyuratam Missile And Space Complex (TTMTR). 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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3900 intel report (Beta)
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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: 21 hours ago
TLE from 21 hours ago
0 COSMOS 252 DEB
1 3900U 68097BM 26030.32754776 .00024892 00000-0 21438-2 0 9999
2 3900 62.1990 92.2258 0199127 207.0881 151.9705 14.83229326869061Epoch: 2026-01-30T07:51Z
TLE epoch observation values (Epoch: 2026-01-30T07:51:40.126Z)
Latitude
-0.00001°
Longitude
-155.25887°
Altitude
744.521 km
Speed
7.417 km/s
True Right ascension
06h 08m 54s
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
07:00:02
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
757.373 km
Perigee altitude
478.747 km
Semi-major axis
6,996.197 km
Eccentricity
0.01991
Inclination
62.199°
RAAN
92.2258°
Arg. of periapsis
207.0881°
True anomaly
153.01966°
Mean anomaly
151.9705°
Eccentric anomaly
152.49736°
Mean motion
3.70894 °/min
Orbital period
97.06 mins
BSTAR
0.0021438
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Other satellites on launch #97 in the year 1968 (1968-11-01 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 252 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-01-31 06:40:43.325Z | 244.491° WSW | 2026-01-31 06:45:43.325Z | 324.656° NNW | 32.355° | 2026-01-31 06:49:43.325Z | 20.548° NNE |
| 6 mins | 2026-01-31 13:31:43.325Z | 354.113° N | 2026-01-31 13:33:43.325Z | 31.232° NE | 26.835° | 2026-01-31 13:37:43.325Z | 107.005° ESE |
| 5 mins | 2026-01-31 15:11:43.325Z | 292.601° NW | 2026-01-31 15:14:43.325Z | 232.537° WSW | 24.009° | 2026-01-31 15:16:43.325Z | 195.279° 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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