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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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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: 22 hours ago

TLE from 22 hours ago

0 COSMOS 1989 (ETALON 1)
1 19751U 89001C   25348.41379716 -.00000056  00000-0  00000-0 0  9993
2 19751  64.8366  78.5199 0023437 217.1741 160.2553  2.13156032287438

Epoch: 2025-12-14T09:55Z

TLE epoch observation values (Epoch: 2025-12-14T09:55:52.074Z)

Latitude

15.82753°

Longitude

-146.13563°

Altitude

19,181.961 km

Speed

3.945 km/s

True Right ascension

05h 44m 38s

True Declination

15° 48' 09"

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

06:38:39

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

19,184.969 km

Perigee altitude

19,065.425 km

Semi-major axis

25,503.334 km

Eccentricity

0.00234

Inclination

64.8366°

RAAN

78.5199°

Arg. of periapsis

217.1741°

True anomaly

160.34578°

Mean anomaly

160.2553°

Eccentric anomaly

160.30057°

Mean motion

0.5329 °/min

Orbital period

675.55 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

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

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

SL-12 DEB, 43334

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

SL-12 DEB, 26814 (Decayed)

SL-12 DEB, 38556 (Decayed)

SL-12 DEB, 36883 (Decayed)

SL-12 DEB, 25799 (Decayed)

SL-12 R/B(2), 19754

SL-12 DEB, 25798

COSMOS 1987 (GLONASS), 19749

SL-12 DEB, 36882

SL-12 DEB, 19753

COSMOS 1988 (GLONASS), 19750

SL-12 DEB, 28260

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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.
282 mins	2025-12-15 08:02:11.357Z	210.921° SW	2025-12-15 09:31:11.357Z	300.096° NW	43.797°	2025-12-15 12:44:11.357Z	79.576° E
149 mins	2025-12-16 05:33:11.357Z	177.345° S	2025-12-16 07:49:11.357Z	97.043° ESE	44.932°	2025-12-16 08:02:11.357Z	37.93° NE

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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 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.

COSMOS 1989 (ETALON 1), 19751

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 22 hours ago

TLE from 22 hours ago

TLE epoch observation values (Epoch: 2025-12-14T09:55:52.074Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

COSMOS 1989 (ETALON 1) Visibility forecast

Co-orbital & Co-planar RSOs

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

Documentation

Expand to show TLE details & history
Last TLE update: 22 hours ago