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COSMOS 2167, 21781

Orbit data source: Space-Track

COSMOS 2167, 21781 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/21781?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21781, 1991-077C

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, Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 COSMOS 2167
1 21781U 91077C   26053.96187727  .00000027  00000-0  87356-4 0  9998
2 21781  82.6079 313.6218 0006940 350.0042  21.1890 12.64287627581516

Epoch: 2026-02-22T23:05Z

TLE epoch observation values (Epoch: 2026-02-22T23:05:06.196Z)

Latitude

11.08238°

Longitude

175.93234°

Altitude

1,402.245 km

Speed

7.162 km/s

True Right ascension

21h 00m 16s

True Declination

11° 01' 23"

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

10:31:13

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,408.014 km

Perigee altitude

1,397.214 km

Semi-major axis

7,780.751 km

Eccentricity

0.00069

Inclination

82.6079°

RAAN

313.6218°

Arg. of periapsis

350.0042°

True anomaly

21.21777°

Mean anomaly

21.189°

Eccentric anomaly

21.20338°

Mean motion

3.16236 °/min

Orbital period

113.84 mins

BSTAR

0.000087356

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

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COSMOS 2167 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.
5 mins	2026-02-23 07:18:53.556Z	300.623° NW	2026-02-23 07:20:53.556Z	285.532° WNW	13.002°	2026-02-23 07:23:53.556Z	263.189° W
9 mins	2026-02-23 16:15:53.556Z	114.082° SE	2026-02-23 16:19:53.556Z	81.648° E	18.552°	2026-02-23 16:24:53.556Z	41.54° NE
15 mins	2026-02-23 18:06:53.556Z	191.941° SSW	2026-02-23 18:13:53.556Z	274.243° WNW	44.452°	2026-02-23 18:21:53.556Z	5.071° NNE
6 mins	2026-02-23 20:07:53.556Z	280.807° WNW	2026-02-23 20:09:53.556Z	296.504° NW	14.286°	2026-02-23 20:13:53.556Z	326.96° NNW
14 mins	2026-02-24 04:07:53.556Z	9.433° NNE	2026-02-24 04:14:53.556Z	82.211° E	33.703°	2026-02-24 04:21:53.556Z	142.508° SSE
13 mins	2026-02-24 06:02:53.556Z	333.597° NNW	2026-02-24 06:08:53.556Z	277.171° WNW	32.499°	2026-02-24 06:15:53.556Z	210.788° 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 2167, 21781 on other resources

View COSMOS 2167, 21781 on NASA - NSSDCA Website

View COSMOS 2167, 21781 on Heavens-Above

View COSMOS 2167, 21781 on Keep Track

View COSMOS 2167, 21781 on Celestrak

View COSMOS 2167, 21781 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 2167, 21781

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-02-22T23:05:06.196Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

COSMOS 2167 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 2167, 21781 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago