COSMOS 1261 DEB, 35507
Orbit data source: Space-Track
COSMOS 1261 DEB, 35507 is space debris originally from a launch on Tue, 31 Mar 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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35507 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, 0.3 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 1 week ago
TLE from 1 week ago
0 COSMOS 1261 DEB
1 35507U 81031N 26075.08337562 -.00001342 00000-0 -74078-3 0 9998
2 35507 62.1237 312.6436 7397884 42.2033 355.4082 2.01892889 96546Epoch: 2026-03-16T02:00Z
TLE epoch observation values (Epoch: 2026-03-16T02:00:03.653Z)
Latitude
0.00024°
Longitude
108.99651°
Altitude
1,320.899 km
Speed
9.407 km/s
True Right ascension
20h 50m 46s
True Declination
0° 00' 01"
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
01:39:37
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
39,626.584 km
Perigee altitude
502.563 km
Semi-major axis
26,442.711 km
Eccentricity
0.73979
Inclination
62.1237°
RAAN
312.6436°
Arg. of periapsis
42.2033°
True anomaly
317.86485°
Mean anomaly
355.4082°
Eccentric anomaly
343.05305°
Mean motion
0.50476 °/min
Orbital period
713.21 mins
BSTAR
-0.00074078
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Other satellites on launch #31 in the year 1981 (1981-03-31 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 1261 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. |
|---|---|---|---|---|---|---|---|
| 289 mins | 2026-03-23 00:47:39.320Z | 329.188° NNW | 2026-03-23 00:59:39.320Z | 56.691° ENE | 43.271° | 2026-03-23 05:36:39.320Z | 188.443° SSW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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