COSMOS 1876, 18335
Orbit data source: Space-Track
COSMOS 1876, 18335 is a payload satellite owned by UNKS (CIS) in LEO that was launched on Mon, 07 Sep 1987 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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18335 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Defense Communications
Bus & Motor
STRELA-3, Unknown motor
Mass
225 kg wet, 225 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.8 m
Radar Cross Section
1.257 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 COSMOS 1876
1 18335U 87074B 25338.69793160 .00000036 00000-0 14287-3 0 9992
2 18335 82.5730 87.1602 0005201 189.9783 290.7831 12.62810485762545Epoch: 2025-12-04T16:45Z
TLE epoch observation values (Epoch: 2025-12-04T16:45:01.290Z)
Latitude
58.58396°
Longitude
-70.10712°
Altitude
1,419.78 km
Speed
7.157 km/s
True Right ascension
16h 59m 35s
True Declination
58° 26' 38"
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
13:21:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,412.736 km
Perigee altitude
1,404.636 km
Semi-major axis
7,786.823 km
Eccentricity
0.00052
Inclination
82.573°
RAAN
87.1602°
Arg. of periapsis
189.9783°
True anomaly
290.72737°
Mean anomaly
290.7831°
Eccentric anomaly
290.75523°
Mean motion
3.15866 °/min
Orbital period
113.97 mins
BSTAR
0.00014287
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Other satellites on launch #74 in the year 1987 (1987-09-07 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 1876 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2025-12-05 17:26:46.298Z | 21.538° NNE | 2025-12-05 17:32:46.298Z | 68.69° E | 18.473° | 2025-12-05 17:37:46.298Z | 106.98° ESE |
| 14 mins | 2025-12-05 19:21:46.298Z | 350.356° N | 2025-12-05 19:28:46.298Z | 214.612° SW | 44.522° | 2025-12-05 19:35:46.298Z | 178.623° S |
| 6 mins | 2025-12-05 21:19:46.298Z | 300.066° NW | 2025-12-05 21:21:46.298Z | 284.492° WNW | 14.049° | 2025-12-05 21:25:46.298Z | 254.85° W |
| 9 mins | 2025-12-06 06:17:46.298Z | 109.668° ESE | 2025-12-06 06:21:46.298Z | 77.121° E | 17.675° | 2025-12-06 06:26:46.298Z | 39.465° NE |
| 15 mins | 2025-12-06 08:08:46.298Z | 189.922° SSW | 2025-12-06 08:15:46.298Z | 314.921° NW | 44.63° | 2025-12-06 08:23:46.298Z | 6.22° NNE |
| 7 mins | 2025-12-06 10:08:46.298Z | 274.613° WNW | 2025-12-06 10:11:46.298Z | 298.325° NW | 15.301° | 2025-12-06 10:15:46.298Z | 328.881° NNW |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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