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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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: 10 hours ago
TLE from 10 hours ago
0 COSMOS 1876
1 18335U 87074B 26061.65244414 .00000015 00000-0 27186-4 0 9995
2 18335 82.5743 30.9285 0005482 13.6986 159.6194 12.62812729773642Epoch: 2026-03-02T15:39Z
TLE epoch observation values (Epoch: 2026-03-02T15:39:31.173Z)
Latitude
6.53317°
Longitude
174.75482°
Altitude
1,417.483 km
Speed
7.151 km/s
True Right ascension
14h 00m 18s
True Declination
6° 29' 52"
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
05:20:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,412.945 km
Perigee altitude
1,404.408 km
Semi-major axis
7,786.813 km
Eccentricity
0.00055
Inclination
82.5743°
RAAN
30.9285°
Arg. of periapsis
13.6986°
True anomaly
159.64126°
Mean anomaly
159.6194°
Eccentric anomaly
159.63033°
Mean motion
3.15866 °/min
Orbital period
113.97 mins
BSTAR
0.000027186
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-03-03 08:28:05.906Z | 13.775° NNE | 2026-03-03 08:34:05.906Z | 64.698° ENE | 27.186° | 2026-03-03 08:41:05.906Z | 127.466° SE |
| 14 mins | 2026-03-03 10:23:05.906Z | 340.808° N | 2026-03-03 10:30:05.906Z | 263.614° W | 39.038° | 2026-03-03 10:37:05.906Z | 197.295° SSW |
| 12 mins | 2026-03-03 21:17:05.906Z | 135.095° SSE | 2026-03-03 21:23:05.906Z | 79.779° E | 26.762° | 2026-03-03 21:29:05.906Z | 29.697° NE |
| 14 mins | 2026-03-03 23:11:05.906Z | 211.467° SW | 2026-03-03 23:17:05.906Z | 278.962° WNW | 38.992° | 2026-03-03 23:25:05.906Z | 358.628° N |
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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