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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: 11 hours ago

TLE from 11 hours ago

0 COSMOS 1911
1 18790U 88002C   25351.77372530  .00000036  00000-0  13685-3 0  9998
2 18790  82.6092   4.2723 0007355 176.5935 357.6893 12.64379197750022

Epoch: 2025-12-17T18:34Z

TLE epoch observation values (Epoch: 2025-12-17T18:34:09.865Z)

Latitude

5.5966°

Longitude

178.36773°

Altitude

1,401.384 km

Speed

7.162 km/s

True Right ascension

12h 14m 11s

True Declination

5° 33' 58"

Sunlit

Object was in daylight 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

04:50:12

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,407.96 km

Perigee altitude

1,396.515 km

Semi-major axis

7,780.375 km

Eccentricity

0.00074

Inclination

82.6092°

RAAN

4.2723°

Arg. of periapsis

176.5935°

True anomaly

357.6859°

Mean anomaly

357.6893°

Eccentric anomaly

357.6876°

Mean motion

3.16259 °/min

Orbital period

113.83 mins

BSTAR

0.00013685

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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.
12 mins	2025-12-18 11:21:14.134Z	17.552° NNE	2025-12-18 11:27:14.134Z	66.74° ENE	22.581°	2025-12-18 11:33:14.134Z	116.759° SE
14 mins	2025-12-18 13:16:14.134Z	345.278° N	2025-12-18 13:23:14.134Z	248.953° W	42.581°	2025-12-18 13:30:14.134Z	187.766° SSW
10 mins	2025-12-19 00:10:14.134Z	122.36° SE	2025-12-19 00:15:14.134Z	79.367° E	21.809°	2025-12-19 00:20:14.134Z	37.979° NE
15 mins	2025-12-19 02:02:14.134Z	199.124° SSW	2025-12-19 02:09:14.134Z	287.302° WNW	42.84°	2025-12-19 02:17:14.134Z	2.762° NNE
4 mins	2025-12-19 04:04:14.134Z	291.13° WNW	2025-12-19 04:05:14.134Z	298.568° NW	11.917°	2025-12-19 04:08:14.134Z	320.542° 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 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: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2025-12-17T18:34:09.865Z)

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: 11 hours ago