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COSMOS 1911, 18790

Orbit data source: Space-Track

COSMOS 1911, 18790 is a payload satellite owned by UNKS (CIS) in LEO that was launched on Fri, 15 Jan 1988 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/18790?theme=dark&initialShowStats=false

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Identifier

18790, 1988-002C

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)

1988-01-15 (38 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: 14 hours ago

TLE from 14 hours ago

0 COSMOS 1911
1 18790U 88002C   26138.58772403  .00000008  00000-0 -14815-4 0  9991
2 18790  82.6073 267.4117 0007336 191.8121 179.9085 12.64384158769219

Epoch: 2026-05-18T14:06Z

TLE epoch observation values (Epoch: 2026-05-18T14:06:19.356Z)

Latitude

11.57957°

Longitude

-178.92691°

Altitude

1,412.594 km

Speed

7.152 km/s

True Right ascension

17h 55m 42s

True Declination

11° 31' 04"

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

12:52:20

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,407.925 km

Perigee altitude

1,396.51 km

Semi-major axis

7,780.355 km

Eccentricity

0.00073

Inclination

82.6073°

RAAN

267.4117°

Arg. of periapsis

191.8121°

True anomaly

179.90863°

Mean anomaly

179.9085°

Eccentric anomaly

179.90857°

Mean motion

3.1626 °/min

Orbital period

113.83 mins

BSTAR

-0.000014815

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Other satellites on launch #2 in the year 1988 (1988-01-15 UTC)

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COSMOS 1911 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.
6 mins	2026-05-19 07:18:25.028Z	98.214° ESE	2026-05-19 07:21:25.028Z	75.901° E	13.221°	2026-05-19 07:24:25.028Z	53.57° ENE
14 mins	2026-05-19 09:08:25.028Z	178.535° S	2026-05-19 09:14:25.028Z	126.737° SE	44.351°	2026-05-19 09:22:25.028Z	10.25° NNE
10 mins	2026-05-19 11:06:25.028Z	259.66° W	2026-05-19 11:10:25.028Z	293.443° NW	19.483°	2026-05-19 11:16:25.028Z	340.353° N
12 mins	2026-05-19 19:09:25.028Z	18.1° NNE	2026-05-19 19:15:25.028Z	76.095° E	27.352°	2026-05-19 19:21:25.028Z	127.576° SE
14 mins	2026-05-19 21:03:25.028Z	340.507° N	2026-05-19 21:10:25.028Z	262.527° W	38.693°	2026-05-19 21:17:25.028Z	197.624° SSW

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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 1911, 18790 on other resources

View COSMOS 1911, 18790 on NASA - NSSDCA Website

View COSMOS 1911, 18790 on Heavens-Above

View COSMOS 1911, 18790 on Keep Track

View COSMOS 1911, 18790 on Celestrak

View COSMOS 1911, 18790 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 1911, 18790

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2026-05-18T14:06:19.356Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #2 in the year 1988 (1988-01-15 UTC)

COSMOS 1911 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 1911, 18790 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 14 hours ago