COSMOS 2491, 39497
Orbit data source: Space-Track
COSMOS 2491, 39497 is a payload satellite owned by TsNIIKhM (CIS) in LEO that was launched on Wed, 25 Dec 2013 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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39497 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
TsNIIKhM
Mission
Non-operational Defense Technology
Bus & Motor
NIVELIR, Unknown motor
Mass
~100 kg wet, ~100 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Hex Box, 0.5 m
Radar Cross Section
0.900 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 COSMOS 2491
1 39497U 13076E 26209.21154721 .00000006 00000-0 -27965-4 0 9991
2 39497 82.4880 142.6455 0013534 6.4541 353.6710 12.43497799570357Epoch: 2026-07-28T05:04Z
TLE epoch observation values (Epoch: 2026-07-28T05:04:37.678Z)
Latitude
-0.00013°
Longitude
120.60447°
Altitude
1,483.923 km
Speed
7.126 km/s
True Right ascension
09h 30m 34s
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
09:52:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,499.809 km
Perigee altitude
1,478.514 km
Semi-major axis
7,867.298 km
Eccentricity
0.00135
Inclination
82.488°
RAAN
142.6455°
Arg. of periapsis
6.4541°
True anomaly
353.65387°
Mean anomaly
353.671°
Eccentric anomaly
353.66244°
Mean motion
3.11032 °/min
Orbital period
115.74 mins
BSTAR
-0.000027965
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Other satellites on launch #76 in the year 2013 (2013-12-25 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 2491 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. |
|---|---|---|---|---|---|---|---|
| 17 mins | 2026-07-28 20:36:00.191Z | 193.788° SSW | 2026-07-28 20:45:00.191Z | 304.351° NW | 43.684° | 2026-07-28 20:53:00.191Z | 4.369° NNE |
| 7 mins | 2026-07-28 22:40:00.191Z | 278.953° WNW | 2026-07-28 22:43:00.191Z | 300.938° NW | 13.772° | 2026-07-28 22:47:00.191Z | 329.331° NNW |
| 15 mins | 2026-07-29 06:48:00.191Z | 3.546° NNE | 2026-07-29 06:55:00.191Z | 71.263° E | 39.045° | 2026-07-29 07:03:00.191Z | 151.687° SSE |
| 12 mins | 2026-07-29 08:46:00.191Z | 325.867° NNW | 2026-07-29 08:52:00.191Z | 270.424° WNW | 27.728° | 2026-07-29 08:58:00.191Z | 221.698° SW |
| 15 mins | 2026-07-29 19:48:00.191Z | 167.026° S | 2026-07-29 19:55:00.191Z | 78.378° E | 41.642° | 2026-07-29 20:03:00.191Z | 14.087° 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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