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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https://www.satcat.com/sats-embedded/35507?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

35507, 1981-031N

Orbit

Molniya

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1981-03-31 (46 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.3 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 3 days ago

TLE from 3 days ago

0 COSMOS 1261 DEB
1 35507U 81031N   26303.36237738 -.00000639  00000-0  90600-3 0  9993
2 35507  61.0639 274.2733 7445193  47.3458 354.8916  2.02066051101155

Epoch: 2026-10-30T08:41Z

TLE epoch observation values (Epoch: 2026-10-30T08:41:49.405Z)

Latitude

0.00008°

Longitude

105.08888°

Altitude

1,457.002 km

Speed

9.31 km/s

True Right ascension

18h 16m 54s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

21:45:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

39,725.51 km

Perigee altitude

373.632 km

Semi-major axis

26,427.708 km

Eccentricity

0.74452

Inclination

61.0639°

RAAN

274.2733°

Arg. of periapsis

47.3458°

True anomaly

312.78908°

Mean anomaly

354.8916°

Eccentric anomaly

341.01207°

Mean motion

0.50519 °/min

Orbital period

712.6 mins

BSTAR

0.000906

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Other satellites on launch #31 in the year 1981 (1981-03-31 UTC)

COSMOS 1261 DEB, 48264 (Decayed)

SL-6 R/B(2), 12384

COSMOS 1261 DEB, 33520

COSMOS 1261 DEB, 12892

COSMOS 1261 DEB, 27796

COSMOS 1261 DEB, 27902 (Decayed)

SL-6 PLAT, 12378 (Decayed)

SL-6 R/B(1), 12377 (Decayed)

COSMOS 1261 DEB, 27901 (Decayed)

COSMOS 1261 DEB, 12894

COSMOS 1261, 12376

COSMOS 1261 DEB, 12893

COSMOS 1261 DEB, 29202 (Decayed)

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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.
246 mins	2026-11-02 08:19:57.936Z	322.963° NNW	2026-11-02 08:30:57.936Z	20.747° NNE	86.812°	2026-11-02 12:25:57.936Z	188.953° SSW

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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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Check out COSMOS 1261 DEB, 35507 on other resources

View COSMOS 1261 DEB, 35507 on Heavens-Above

View COSMOS 1261 DEB, 35507 on Keep Track

View COSMOS 1261 DEB, 35507 on Celestrak

View COSMOS 1261 DEB, 35507 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

COSMOS 1261 DEB, 35507

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-10-30T08:41:49.405Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #31 in the year 1981 (1981-03-31 UTC)

COSMOS 1261 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 1261 DEB, 35507 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago