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COSMOS 2169, 21783

Orbit data source: Space-Track

COSMOS 2169, 21783 is a payload satellite owned by UNKS RF (CIS) in LEO that was launched on Tue, 12 Nov 1991 UTC via a TSIKLON-3 launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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https://www.satcat.com/sats-embedded/21783?theme=dark&initialShowStats=false

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Identifier

21783, 1991-077E

Orbit

LEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

NPO PM

Mission

Defense Communications

Bus & Motor

STRELA-3, Unknown motor

Mass

225 kg wet, 225 kg dry

Launch date (UTC)

1991-11-12 (34 years ago)

Launch vehicle

TSIKLON-3

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 0.8 m

Radar Cross Section

1.257 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 COSMOS 2169
1 21783U 91077E   26053.72247599  .00000015  00000-0  20450-4 0  9997
2 21783  82.6006 281.8181 0016999 230.9990 128.9590 12.66311941584308

Epoch: 2026-02-22T17:20Z

TLE epoch observation values (Epoch: 2026-02-22T17:20:21.925Z)

Latitude

-0.00005°

Longitude

-130.89989°

Altitude

1,408.061 km

Speed

7.152 km/s

True Right ascension

18h 47m 16s

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

08:37:46

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,407.526 km

Perigee altitude

1,381.102 km

Semi-major axis

7,772.451 km

Eccentricity

0.0017

Inclination

82.6006°

RAAN

281.8181°

Arg. of periapsis

230.999°

True anomaly

129.11027°

Mean anomaly

128.959°

Eccentric anomaly

129.03465°

Mean motion

3.16742 °/min

Orbital period

113.66 mins

BSTAR

0.00002045

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Other satellites on launch #77 in the year 1991 (1991-11-12 UTC)

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COSMOS 2169 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.
12 mins	2026-02-23 14:18:44.920Z	129.234° SE	2026-02-23 14:24:44.920Z	81.198° E	22.167°	2026-02-23 14:30:44.920Z	33.459° NE
15 mins	2026-02-23 16:11:44.920Z	199.716° SSW	2026-02-23 16:18:44.920Z	286.841° WNW	42.67°	2026-02-23 16:26:44.920Z	2.541° NNE
4 mins	2026-02-23 18:13:44.920Z	292.42° WNW	2026-02-23 18:14:44.920Z	299.838° NW	11.8°	2026-02-23 18:17:44.920Z	321.6° NNW
14 mins	2026-02-24 02:11:44.920Z	6.856° NNE	2026-02-24 02:17:44.920Z	65.718° ENE	36.83°	2026-02-24 02:25:44.920Z	148.7° SSE
12 mins	2026-02-24 04:06:44.920Z	329.251° NNW	2026-02-24 04:12:44.920Z	272.213° WNW	28.887°	2026-02-24 04:18:44.920Z	218.667° 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 2169, 21783 on other resources

View COSMOS 2169, 21783 on NASA - NSSDCA Website

View COSMOS 2169, 21783 on Heavens-Above

View COSMOS 2169, 21783 on Keep Track

View COSMOS 2169, 21783 on Celestrak

View COSMOS 2169, 21783 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 2169, 21783

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-02-22T17:20:21.925Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #77 in the year 1991 (1991-11-12 UTC)

COSMOS 2169 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 2169, 21783 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago