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COSMOS 1989 (ETALON 1), 19751

Orbit data source: Space-Track

COSMOS 1989 (ETALON 1), 19751 is a payload satellite owned by NPO PM (CIS) in MEO that was launched on Tue, 10 Jan 1989 UTC via a PROTON-K/DM-2 launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). 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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ISO8601 Format

Identifier

19751, 1989-001C

Orbit

MEO

Country

CIS

Related business

Federal Space Agency of Russia (Roscosmos) (RU)

Manufacturer

OAZ?

Mission

Operational Defense Geodetic

Bus & Motor

ETALON, Unknown motor

Mass

1,230 kg wet, 1,230 kg dry

Launch date (UTC)

1989-01-10 (37 years ago)

Launch vehicle

PROTON-K/DM-2

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Sphere, 0.6 m

Radar Cross Section

1.307 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 COSMOS 1989 (ETALON 1)
1 19751U 89001C   26171.29910284 -.00000041  00000-0  00000+0 0  9998
2 19751  64.9471  72.0890 0023318 217.5749 335.3242  2.13155980291439

Epoch: 2026-06-20T07:10Z

TLE epoch observation values (Epoch: 2026-06-20T07:10:42.485Z)

Latitude

-11.60736°

Longitude

-118.59571°

Altitude

19,074.398 km

Speed

3.962 km/s

True Right ascension

17h 10m 23s

True Declination

-11° 35' 18"

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

23:21:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

19,184.666 km

Perigee altitude

19,065.729 km

Semi-major axis

25,503.334 km

Eccentricity

0.00233

Inclination

64.9471°

RAAN

72.089°

Arg. of periapsis

217.5749°

True anomaly

335.21235°

Mean anomaly

335.3242°

Eccentric anomaly

335.2683°

Mean motion

0.5329 °/min

Orbital period

675.55 mins

BSTAR

0

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Other satellites on launch #1 in the year 1989 (1989-01-10 UTC)

SL-12 DEB, 28259 (Decayed)

SL-12 R/B(2), 19754

SL-12 DEB, 26813 (Decayed)

SL-12 DEB, 38556 (Decayed)

SL-12 DEB, 25799 (Decayed)

SL-12 R/B(1), 19752 (Decayed)

SL-12 DEB, 25798

SL-12 R/B(AUX MOTOR), 19856

SL-12 DEB, 26046 (Decayed)

SL-12 DEB, 36882

SL-12 DEB, 28257 (Decayed)

SL-12 DEB, 26814 (Decayed)

SL-12 R/B(AUX MOTOR), 19755

SL-12 DEB, 28258 (Decayed)

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

COSMOS 1989 (ETALON 1) 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.
375 mins	2026-06-22 20:17:52.355Z	228.213° WSW	2026-06-22 23:17:52.355Z	349.473° N	40.125°	2026-06-23 02:32:52.355Z	122.437° SE

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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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Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

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

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Check out COSMOS 1989 (ETALON 1), 19751 on other resources

View COSMOS 1989 (ETALON 1), 19751 on NASA - NSSDCA Website

View COSMOS 1989 (ETALON 1), 19751 on Heavens-Above

View COSMOS 1989 (ETALON 1), 19751 on Keep Track

View COSMOS 1989 (ETALON 1), 19751 on Celestrak

View COSMOS 1989 (ETALON 1), 19751 on Gunter's Space Page

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

Documentation

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