COSMOS 2508, 40921
Orbit data source: Space-Track
COSMOS 2508, 40921 is a payload satellite owned by VVKO VKS (CIS) in LEO that was launched on Wed, 23 Sep 2015 UTC via an ROKOT 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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40921 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
Resehetnev ISS
Mission
Operational Defense Communications
Bus & Motor
STRELA-3M, Unknown motor
Mass
280 kg wet, 280 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 1 Ant, 3.5 m
Radar Cross Section
1.583 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 COSMOS 2508
1 40921U 15050B 25260.30686631 .00000040 00000-0 21584-3 0 9992
2 40921 82.4829 248.1326 0012499 259.0531 100.9143 12.42901523452948Epoch: 2025-09-17T07:21Z
TLE epoch observation values (Epoch: 2025-09-17T07:21:53.249Z)
Latitude
0.00004°
Longitude
141.17603°
Altitude
1,498.902 km
Speed
7.114 km/s
True Right ascension
16h 32m 31s
True Declination
0° 00' 00"
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
18:28:21
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,501.516 km
Perigee altitude
1,481.843 km
Semi-major axis
7,869.816 km
Eccentricity
0.00125
Inclination
82.4829°
RAAN
248.1326°
Arg. of periapsis
259.0531°
True anomaly
101.0549°
Mean anomaly
100.9143°
Eccentric anomaly
100.9846°
Mean motion
3.10883 °/min
Orbital period
115.8 mins
BSTAR
0.00021584
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Other satellites on launch #50 in the year 2015 (2015-09-23 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 2508 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-09-18 09:06:53.645Z | 27.797° NE | 2025-09-18 09:11:53.645Z | 65.11° ENE | 16.498° | 2025-09-18 09:15:53.645Z | 94.664° ESE |
| 16 mins | 2025-09-18 11:01:53.645Z | 353.483° N | 2025-09-18 11:09:53.645Z | 120.132° SE | 44.855° | 2025-09-18 11:17:53.645Z | 172.209° S |
| 9 mins | 2025-09-18 13:00:53.645Z | 315.149° NNW | 2025-09-18 13:04:53.645Z | 285.258° WNW | 17.573° | 2025-09-18 13:09:53.645Z | 247.371° WSW |
| 10 mins | 2025-09-18 22:08:53.645Z | 113.474° SE | 2025-09-18 22:13:53.645Z | 74.699° E | 18.425° | 2025-09-18 22:18:53.645Z | 38.665° NE |
| 16 mins | 2025-09-19 00:01:53.645Z | 190.09° SSW | 2025-09-19 00:08:53.645Z | 252.186° W | 44.692° | 2025-09-19 00:17:53.645Z | 6.346° NNE |
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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