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COSMOS 1691, 16139

Orbit data source: Space-Track

COSMOS 1691, 16139 is a payload satellite owned by GUKOS (CIS) in LEO that was launched on Wed, 09 Oct 1985 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/16139?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

16139, 1985-094B

Orbit

LEO

Last TLE update

6 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)

1985-10-09 (40 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, Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 6 hours ago

0 COSMOS 1691
1 16139U 85094B   25221.78975748  .00000031  00000-0  11292-3 0  9995
2 16139  82.6131 127.8035 0001199  85.7488 329.2482 12.62463368835983

Epoch: 2025-08-09T18:57Z

TLE epoch observation values (Epoch: 2025-08-09T18:57:15.046Z)

Latitude

54.40863°

Longitude

-104.6453°

Altitude

1,420.897 km

Speed

7.156 km/s

True Right ascension

09h 12m 45s

True Declination

54° 15' 34"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

61.96787°

Longitude

50.78864°

Altitude

1,422.579 km

Speed

7.156 km/s

Apparent Right ascension

00h 14m 38s

Apparent Declination

30° 33' 19"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

15:13:55

Azimuth

37.826° NE

Elevation

-8.179°

Doppler factor

Orbital elements

Apogee altitude

1,411.046 km

Perigee altitude

1,409.179 km

Semi-major axis

7,788.249 km

Eccentricity

0.00012

Inclination

82.6131°

RAAN

127.8035°

Arg. of periapsis

85.7488°

True anomaly

329.24117°

Mean anomaly

329.2482°

Eccentric anomaly

329.24469°

Mean motion

3.15779 °/min

Orbital period

114 mins

BSTAR

0.00011292

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Other satellites on launch #94 in the year 1985 (1985-10-09 UTC)

COSMOS 1690, 16138

COSMOS 1691 DEB, 43316

COSMOS 1691 DEB, 43317

COSMOS 1691 DEB, 43318

COSMOS 1691 DEB, 16264 (Decayed)

COSMOS 1691 DEB, 16265 (Decayed)

COSMOS 1691 DEB, 16266

COSMOS 1691 DEB, 16267

COSMOS 1691 DEB, 16268

COSMOS 1691 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	2025-08-10 04:46:19.677Z	5.245° NNE	2025-08-10 04:54:19.677Z	79.392° E	33.903°	2025-08-10 05:01:19.677Z	142.111° SSE
13 mins	2025-08-10 06:43:19.677Z	330.578° NNW	2025-08-10 06:49:19.677Z	266.565° W	32.285°	2025-08-10 06:56:19.677Z	208.772° SW
14 mins	2025-08-10 17:35:19.677Z	151.165° SSE	2025-08-10 17:42:19.677Z	80.614° E	33.885°	2025-08-10 17:49:19.677Z	21.48° NNE
14 mins	2025-08-10 19:30:19.677Z	223.305° SW	2025-08-10 19:37:19.677Z	293.324° NW	32.297°	2025-08-10 19:44:19.677Z	352.946° N

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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Authenticating...

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Check out COSMOS 1691, 16139 on other resources

View COSMOS 1691, 16139 on NASA - NSSDCA Website

View COSMOS 1691, 16139 on Heavens-Above

View COSMOS 1691, 16139 on Keep Track

View COSMOS 1691, 16139 on Celestrak

View COSMOS 1691, 16139 on Gunter's Space Page

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