COSMOS 1635, 15617
Orbit data source: Space-Track
COSMOS 1635, 15617 is a payload satellite owned by GUKOS (CIS) in LEO that was launched on Thu, 21 Mar 1985 UTC via a KOSMOS 11K65M 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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15617 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Spacecraft
Bus & Motor
STRELA-1 11F625, Unknown motor
Mass
60 kg wet, 60 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 COSMOS 1635
1 15617U 85023A 25346.90393829 .00000006 00000-0 14996-3 0 9999
2 15617 74.0531 141.2549 0023856 74.8726 40.1798 12.43254837848565Epoch: 2025-12-12T21:41Z
TLE epoch observation values (Epoch: 2025-12-12T21:41:40.268Z)
Latitude
60.53077°
Longitude
-116.21397°
Altitude
1,488.445 km
Speed
7.132 km/s
True Right ascension
19h 24m 10s
True Declination
60° 23' 49"
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
05:23:37
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,509.449 km
Perigee altitude
1,471.905 km
Semi-major axis
7,868.814 km
Eccentricity
0.00239
Inclination
74.0531°
RAAN
141.2549°
Arg. of periapsis
74.8726°
True anomaly
40.35658°
Mean anomaly
40.1798°
Eccentric anomaly
40.26815°
Mean motion
3.10942 °/min
Orbital period
115.78 mins
BSTAR
0.00014996
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Other satellites on launch #23 in the year 1985 (1985-03-21 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 1635 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. |
|---|---|---|---|---|---|---|---|
| 15 mins | 2025-12-13 10:41:13.283Z | 161.856° S | 2025-12-13 10:48:13.283Z | 100.718° ESE | 33.521° | 2025-12-13 10:56:13.283Z | 32.574° NE |
| 14 mins | 2025-12-13 12:40:13.283Z | 233.943° WSW | 2025-12-13 12:46:13.283Z | 293.356° NW | 34.885° | 2025-12-13 12:54:13.283Z | 7.085° NNE |
| 15 mins | 2025-12-13 20:51:13.283Z | 355.522° N | 2025-12-13 20:58:13.283Z | 65.693° ENE | 35.734° | 2025-12-13 21:06:13.283Z | 133.96° SE |
| 14 mins | 2025-12-13 22:49:13.283Z | 323.789° NNW | 2025-12-13 22:56:13.283Z | 260.421° W | 32.727° | 2025-12-13 23:03:13.283Z | 199.84° SSW |
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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