COSMOS 1641, 15623
Orbit data source: Space-Track
COSMOS 1641, 15623 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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15623 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: 15 hours ago
TLE from 15 hours ago
0 COSMOS 1641
1 15623U 85023G 25348.97356797 -.00000024 00000-0 -51919-4 0 9997
2 15623 74.0565 82.7969 0043860 199.0794 278.1936 12.54559586865620Epoch: 2025-12-14T23:21Z
TLE epoch observation values (Epoch: 2025-12-14T23:21:56.272Z)
Latitude
59.23896°
Longitude
159.90417°
Altitude
1,450.398 km
Speed
7.145 km/s
True Right ascension
15h 37m 04s
True Declination
59° 06' 04"
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
13:22:42
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,477.614 km
Perigee altitude
1,409.004 km
Semi-major axis
7,821.446 km
Eccentricity
0.00439
Inclination
74.0565°
RAAN
82.7969°
Arg. of periapsis
199.0794°
True anomaly
277.69575°
Mean anomaly
278.1936°
Eccentric anomaly
277.94471°
Mean motion
3.13771 °/min
Orbital period
114.73 mins
BSTAR
-0.000051919
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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 1641 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. |
|---|---|---|---|---|---|---|---|
| 14 mins | 2025-12-15 16:33:08.000Z | 356.916° N | 2025-12-15 16:40:08.000Z | 57.744° ENE | 30.481° | 2025-12-15 16:47:08.000Z | 120.95° SE |
| 14 mins | 2025-12-15 18:31:08.000Z | 327.214° NNW | 2025-12-15 18:37:08.000Z | 269.267° W | 37.642° | 2025-12-15 18:45:08.000Z | 188.306° SSW |
| 7 mins | 2025-12-16 05:31:08.000Z | 108.917° ESE | 2025-12-16 05:34:08.000Z | 86.96° E | 14.217° | 2025-12-16 05:38:08.000Z | 58.849° ENE |
| 16 mins | 2025-12-16 07:22:08.000Z | 191.213° SSW | 2025-12-16 07:30:08.000Z | 69.209° E | 44.479° | 2025-12-16 07:38:08.000Z | 21.115° NNE |
| 11 mins | 2025-12-16 09:23:08.000Z | 267.457° W | 2025-12-16 09:28:08.000Z | 309.96° NW | 22.102° | 2025-12-16 09:34:08.000Z | 356.246° 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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