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 (45 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: 21 hours ago

TLE from 21 hours ago

0 COSMOS 1261 DEB
1 35507U 81031N   25353.88446182 -.00001461  00000-0 -39301-2 0  9994
2 35507  62.5621 326.4258 7375596  40.9798 355.5279  2.01857411 94809

Epoch: 2025-12-19T21:13Z

TLE epoch observation values (Epoch: 2025-12-19T21:13:37.501Z)

Latitude

0.00014°

Longitude

-80.75863°

Altitude

1,388.658 km

Speed

9.359 km/s

True Right ascension

21h 45m 28s

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

16:53:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

39,572.962 km

Perigee altitude

562.301 km

Semi-major axis

26,445.768 km

Eccentricity

0.73756

Inclination

62.5621°

RAAN

326.4258°

Arg. of periapsis

40.9798°

True anomaly

319.28341°

Mean anomaly

355.5279°

Eccentric anomaly

343.58775°

Mean motion

0.50467 °/min

Orbital period

713.34 mins

BSTAR

-0.0039301

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

SL-6 R/B(2), 12384

COSMOS 1261 DEB, 12892

COSMOS 1261 DEB, 27902 (Decayed)

COSMOS 1261, 12376

COSMOS 1261 DEB, 12893

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

COSMOS 1261 DEB, 48264 (Decayed)

COSMOS 1261 DEB, 27901 (Decayed)

SL-6 PLAT, 12378 (Decayed)

COSMOS 1261 DEB, 27796

COSMOS 1261 DEB, 33520

COSMOS 1261 DEB, 12894

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.
255 mins	2025-12-21 09:17:23.090Z	321.811° NNW	2025-12-21 09:34:23.090Z	241.161° WSW	44.539°	2025-12-21 13:32:23.090Z	204.988° SW

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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: 21 hours ago

TLE from 21 hours ago

TLE epoch observation values (Epoch: 2025-12-19T21:13:37.501Z)

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: 21 hours ago