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COSMOS 2165, 21779

Orbit data source: Space-Track

COSMOS 2165, 21779 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/21779?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/21779?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21779, 1991-077A

Orbit

LEO

Last TLE update

20 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, Large (>1 m²)

Expand to show TLE details & history

TLE from 20 hours ago

0 COSMOS 2165
1 21779U 91077A   25128.53359382  .00000039  00000-0  15572-3 0  9991
2 21779  82.6025 130.7037 0009184 254.4231 227.3396 12.64907810546112

Epoch: 2025-05-08T12:48Z

Definitive object data (Epoch: 2025-05-08T12:48:22.506Z)

Latitude

57.64068°

Longitude

-119.75755°

Altitude

1,417.242 km

Speed

7.155 km/s

True Right ascension

19h 55m 45s

True Declination

57° 29' 53"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-79.64329°

Longitude

-63.53287°

Altitude

1,423.766 km

Speed

7.152 km/s

Apparent Right ascension

03h 43m 09s

Apparent Declination

-65° 08' 15"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

16:41:06

Azimuth

166.398° S

Elevation

-63.433°

Doppler factor

Orbital elements

Apogee altitude

1,407.212 km

Perigee altitude

1,392.925 km

Semi-major axis

7,778.206 km

Eccentricity

0.0009184

Inclination

82.6025°

RAAN

130.7037°

Arg. of periapsis

254.4231°

True anomaly

227.26227°

Mean anomaly

227.3396°

Eccentric anomaly

227.30093°

Mean motion

3.16391 °/min

BSTAR

0.00015572

Orbital period

113.78 mins

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

COSMOS 2165 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.
4 mins	2025-05-09 09:41:56.026Z	42.523° NE	2025-05-09 09:43:56.026Z	56.963° ENE	11.212°	2025-05-09 09:45:56.026Z	71.507° E
14 mins	2025-05-09 11:33:56.026Z	0.64° NNE	2025-05-09 11:40:56.026Z	90.507° ESE	42.102°	2025-05-09 11:47:56.026Z	159.608° S
11 mins	2025-05-09 13:29:56.026Z	319.879° NNW	2025-05-09 13:34:56.026Z	275.439° WNW	22.77°	2025-05-09 13:40:56.026Z	228.281° WSW
14 mins	2025-05-10 00:19:56.026Z	168.615° S	2025-05-10 00:26:56.026Z	78.708° E	41.901°	2025-05-10 00:33:56.026Z	14.662° NNE
11 mins	2025-05-10 02:16:56.026Z	246.81° WSW	2025-05-10 02:21:56.026Z	291.854° WNW	23.787°	2025-05-10 02:27:56.026Z	342.439° N

Authenticating...

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Check out COSMOS 2165, 21779 on other resources

View COSMOS 2165, 21779 on NASA - NSSDCA Website

View COSMOS 2165, 21779 on Heavens-Above

View COSMOS 2165, 21779 on Keep Track

View COSMOS 2165, 21779 on Celestrak

View COSMOS 2165, 21779 on Gunter's Space Page

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