Showing default

COSMOS 2170, 21784

Orbit data source: Space-Track

COSMOS 2170, 21784 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/21784?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/21784?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

21784, 1991-077F

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, Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 8 hours ago

0 COSMOS 2170
1 21784U 91077F   25196.54615096  .00000035  00000-0  13678-3 0  9991
2 21784  82.6097 123.1317 0002731   5.3920 168.2488 12.62576562551590

Epoch: 2025-07-15T13:06Z

TLE epoch observation values (Epoch: 2025-07-15T13:06:27.442Z)

Latitude

6.22723°

Longitude

172.07132°

Altitude

1,416.552 km

Speed

7.152 km/s

True Right ascension

20h 09m 17s

True Declination

6° 11' 36"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

-72.18438°

Longitude

-31.01841°

Altitude

1,438.56 km

Speed

7.142 km/s

Apparent Right ascension

23h 48m 25s

Apparent Declination

-71° 42' 38"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

09:54:04

Azimuth

195.233° SSW

Elevation

-55.145°

Doppler factor

Orbital elements

Apogee altitude

1,411.774 km

Perigee altitude

1,407.52 km

Semi-major axis

7,787.784 km

Eccentricity

0.00027

Inclination

82.6097°

RAAN

123.1317°

Arg. of periapsis

5.392°

True anomaly

Unknown

Mean anomaly

168.2488°

Eccentric anomaly

Unknown

Mean motion

3.15807 °/min

Orbital period

113.99 mins

BSTAR

0.00013678

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 2170 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.
10 mins	2025-07-15 21:51:38.557Z	257.363° W	2025-07-15 21:56:38.557Z	295.514° NW	17.136°	2025-07-15 22:01:38.557Z	334.319° NNW
13 mins	2025-07-16 05:55:38.557Z	13.282° NNE	2025-07-16 06:01:38.557Z	69.888° E	30.588°	2025-07-16 06:08:38.557Z	134.445° SE
14 mins	2025-07-16 07:50:38.557Z	336.331° NNW	2025-07-16 07:56:38.557Z	276.558° WNW	35.838°	2025-07-16 08:04:38.557Z	202.141° SSW
13 mins	2025-07-16 18:43:38.557Z	143.637° SSE	2025-07-16 18:49:38.557Z	89.079° E	30.414°	2025-07-16 18:56:38.557Z	25.814° NE
13 mins	2025-07-16 20:38:38.557Z	219.284° SW	2025-07-16 20:44:38.557Z	285.287° WNW	35.79°	2025-07-16 20:51:38.557Z	353.809° N

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 2170, 21784 on other resources

View COSMOS 2170, 21784 on NASA - NSSDCA Website

View COSMOS 2170, 21784 on Heavens-Above

View COSMOS 2170, 21784 on Keep Track

View COSMOS 2170, 21784 on Celestrak

View COSMOS 2170, 21784 on Gunter's Space Page

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