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COSMOS 2090, 20735

Orbit data source: Space-Track

COSMOS 2090, 20735 is a payload satellite owned by UNKS (CIS) in LEO that was launched on Wed, 08 Aug 1990 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/20735?theme=dark&initialShowStats=false

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Identifier

20735, 1990-070A

Orbit

LEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

NPO PM

Mission

Defense Communications

Bus & Motor

STRELA-3, Unknown motor

Mass

225 kg wet, 225 kg dry

Launch date (UTC)

1990-08-08 (36 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, Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 COSMOS 2090
1 20735U 90070A   26066.53971750  .00000045  00000-0  18329-3 0  9995
2 20735  82.5718 337.5364 0013510 298.7994 234.9019 12.65362605643073

Epoch: 2026-03-07T12:57Z

TLE epoch observation values (Epoch: 2026-03-07T12:57:11.592Z)

Latitude

6.29876°

Longitude

157.15769°

Altitude

1,409.081 km

Speed

7.153 km/s

True Right ascension

10h 26m 51s

True Declination

6° 15' 52"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

01:56:25

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,408.711 km

Perigee altitude

1,387.699 km

Semi-major axis

7,776.342 km

Eccentricity

0.00135

Inclination

82.5718°

RAAN

337.5364°

Arg. of periapsis

298.7994°

True anomaly

234.77536°

Mean anomaly

234.9019°

Eccentric anomaly

234.83862°

Mean motion

3.16505 °/min

Orbital period

113.74 mins

BSTAR

0.00018329

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Other satellites on launch #70 in the year 1990 (1990-08-08 UTC)

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COSMOS 2090 Visibility forecast

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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.
8 mins	2026-03-08 03:51:23.353Z	33.825° NE	2026-03-08 03:55:23.353Z	64.722° ENE	14.834°	2026-03-08 03:59:23.353Z	94.317° ESE
15 mins	2026-03-08 05:44:23.353Z	355.468° N	2026-03-08 05:51:23.353Z	109.802° ESE	44.529°	2026-03-08 05:59:23.353Z	169.983° S
8 mins	2026-03-08 07:41:23.353Z	309.27° NW	2026-03-08 07:44:23.353Z	284.406° WNW	18.155°	2026-03-08 07:49:23.353Z	244.372° WSW
5 mins	2026-03-08 16:41:23.353Z	90.893° ESE	2026-03-08 16:43:23.353Z	75.579° E	13.17°	2026-03-08 16:46:23.353Z	53.264° ENE
15 mins	2026-03-08 18:29:23.353Z	179.196° S	2026-03-08 18:36:23.353Z	117.187° SE	44.453°	2026-03-08 18:44:23.353Z	10.236° NNE
9 mins	2026-03-08 20:28:23.353Z	261.145° W	2026-03-08 20:32:23.353Z	295.529° NW	19.441°	2026-03-08 20:37:23.353Z	335.934° NNW

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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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out COSMOS 2090, 20735 on other resources

View COSMOS 2090, 20735 on NASA - NSSDCA Website

View COSMOS 2090, 20735 on Heavens-Above

View COSMOS 2090, 20735 on Keep Track

View COSMOS 2090, 20735 on Celestrak

View COSMOS 2090, 20735 on Gunter's Space Page

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

COSMOS 2090, 20735

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-03-07T12:57:11.592Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #70 in the year 1990 (1990-08-08 UTC)

COSMOS 2090 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 2090, 20735 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago