Showing default

COSMOS 2166, 21780

Orbit data source: Space-Track

COSMOS 2166, 21780 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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/21780?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/21780?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

21780, 1991-077B

Orbit

LEO

Last TLE update

8 hours ago

Origin

Russian Space Forces (CIS)

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, 1.6 m

Radar Cross Section

1.257 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 8 hours ago

0 COSMOS 2166
1 21780U 91077B   25193.18454118  .00000039  00000-0  15892-3 0  9994
2 21780  82.5991 103.1296 0002601 193.3780 320.4333 12.63436831552485

Epoch: 2025-07-12T04:25Z

TLE epoch observation values (Epoch: 2025-07-12T04:25:44.357Z)

Latitude

26.00369°

Longitude

-77.2459°

Altitude

1,410.245 km

Speed

7.158 km/s

True Right ascension

18h 38m 03s

True Declination

25° 52' 47"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

-81.75032°

Longitude

43.09023°

Altitude

1,436.793 km

Speed

7.143 km/s

Apparent Right ascension

12h 34m 44s

Apparent Declination

-71° 40' 42"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

01:02:01

Azimuth

175.954° S

Elevation

-58.053°

Doppler factor

Orbital elements

Apogee altitude

1,408.134 km

Perigee altitude

1,404.085 km

Semi-major axis

7,784.246 km

Eccentricity

0.00026

Inclination

82.5991°

RAAN

103.1296°

Arg. of periapsis

193.378°

True anomaly

Unknown

Mean anomaly

320.4333°

Eccentric anomaly

Unknown

Mean motion

3.16023 °/min

Orbital period

113.92 mins

BSTAR

0.00015892

Loading maneuver chart data...

Loading SW <> Apogee altitude chart data...

Loading historical data...

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

COSMOS 2166 Visibility forecast

Observer location: undefined°, undefined°

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.
9 mins	2025-07-12 17:03:50.995Z	114.607° SE	2025-07-12 17:07:50.995Z	83.002° E	18.253°	2025-07-12 17:12:50.995Z	42.765° NE
15 mins	2025-07-12 18:54:50.995Z	190.996° SSW	2025-07-12 19:01:50.995Z	252.53° W	44.485°	2025-07-12 19:09:50.995Z	5.193° NNE
7 mins	2025-07-12 20:55:50.995Z	278.371° WNW	2025-07-12 20:58:50.995Z	302.099° NW	14.637°	2025-07-12 21:02:50.995Z	331.534° NNW
13 mins	2025-07-13 04:56:50.995Z	11.155° NNE	2025-07-13 05:02:50.995Z	71.423° E	33.572°	2025-07-13 05:09:50.995Z	139.939° SSE
13 mins	2025-07-13 06:51:50.995Z	332.61° NNW	2025-07-13 06:57:50.995Z	272.492° WNW	32.741°	2025-07-13 07:04:50.995Z	209.378° SW

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in ascending order

Check out COSMOS 2166, 21780 on other resources

View COSMOS 2166, 21780 on NASA - NSSDCA Website

View COSMOS 2166, 21780 on Heavens-Above

View COSMOS 2166, 21780 on Keep Track

View COSMOS 2166, 21780 on Celestrak

View COSMOS 2166, 21780 on Gunter's Space Page

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