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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19751 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
OAZ?
Mission
Operational Defense Geodetic
Bus & Motor
ETALON, Unknown motor
Mass
1,230 kg wet, 1,230 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Sphere, 0.6 m
Radar Cross Section
1.307 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 COSMOS 1989 (ETALON 1)
1 19751U 89001C 25256.91173513 .00000028 00000-0 00000-0 0 9991
2 19751 64.7847 81.6546 0023417 216.7736 145.6978 2.13156016285482Epoch: 2025-09-13T21:52Z
TLE epoch observation values (Epoch: 2025-09-13T21:52:53.915Z)
Latitude
2.33163°
Longitude
121.38441°
Altitude
19,175.167 km
Speed
3.946 km/s
True Right ascension
05h 30m 59s
True Declination
2° 19' 40"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
02:05:49
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
19,184.921 km
Perigee altitude
19,065.479 km
Semi-major axis
25,503.337 km
Eccentricity
0.00234
Inclination
64.7847°
RAAN
81.6546°
Arg. of periapsis
216.7736°
True anomaly
145.84866°
Mean anomaly
145.6978°
Eccentric anomaly
145.77327°
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)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.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. |
|---|---|---|---|---|---|---|---|
| 50 mins | 2025-09-15 09:27:53.843Z | 47.001° ENE | 2025-09-15 09:27:53.843Z | 47.001° ENE | 17.487° | 2025-09-15 10:17:53.843Z | 24.228° NE |
| 306 mins | 2025-09-15 20:14:53.843Z | 302.052° NW | 2025-09-15 23:02:53.843Z | 71.988° E | 44.977° | 2025-09-16 01:20:53.843Z | 176.019° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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