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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.

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<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

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ISO8601 Format

Identifier

21784, 1991-077F

Orbit

LEO

Last TLE update

18 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 (33 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 18 hours ago

0 COSMOS 2170
1 21784U 91077F   25128.62355376  .00000039  00000-0  15585-3 0  9990
2 21784  82.6086 166.3070 0003799 119.6818   1.2242 12.62575243543302

Epoch: 2025-05-08T14:57Z

Definitive object data (Epoch: 2025-05-08T14:57:55.044Z)

Latitude

58.39659°

Longitude

-116.97411°

Altitude

1,419.184 km

Speed

7.158 km/s

True Right ascension

22h 16m 47s

True Declination

58° 15' 21"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-58.43997°

Longitude

62.52632°

Altitude

1,437.84 km

Speed

7.141 km/s

Apparent Right ascension

07h 27m 09s

Apparent Declination

-56° 24' 18"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

17:11:14

Azimuth

221.917° SW

Elevation

-62.425°

Doppler factor

Orbital elements

Apogee altitude

1,412.611 km

Perigee altitude

1,406.694 km

Semi-major axis

7,787.789 km

Eccentricity

0.0003799

Inclination

82.6086°

RAAN

166.307°

Arg. of periapsis

119.6818°

True anomaly

1.22513°

Mean anomaly

1.2242°

Eccentric anomaly

1.22467°

Mean motion

3.15807 °/min

BSTAR

0.00015585

Orbital period

113.99 mins

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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.
15 mins	2025-05-09 13:44:58.827Z	0.699° NNE	2025-05-09 13:52:58.827Z	81.876° E	39.886°	2025-05-09 13:59:58.827Z	153.469° SSE
12 mins	2025-05-09 15:41:58.827Z	324.594° NNW	2025-05-09 15:46:58.827Z	280.091° WNW	25.752°	2025-05-09 15:53:58.827Z	221.774° SW
14 mins	2025-05-10 02:33:58.827Z	162.746° S	2025-05-10 02:39:58.827Z	100.796° ESE	39.947°	2025-05-10 02:47:58.827Z	16.302° NNE
12 mins	2025-05-10 04:29:58.827Z	238.302° WSW	2025-05-10 04:35:58.827Z	293.157° NW	26.125°	2025-05-10 04:41:58.827Z	344.633° N

Authenticating...

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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

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