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, 0.7 m
Radar Cross Section
0.900 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 COSMOS 2491
1 39497U 13076E 26255.95733459 .00000024 00000-0 99871-4 0 9998
2 39497 82.4826 113.4932 0012198 259.6957 100.2748 12.43498572576163Epoch: 2026-09-12T22:58Z
TLE epoch observation values (Epoch: 2026-09-12T22:58:33.708Z)
Latitude
-0.00001°
Longitude
136.89386°
Altitude
1,496.231 km
Speed
7.115 km/s
True Right ascension
07h 33m 58s
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
21:37:53
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,498.755 km
Perigee altitude
1,479.562 km
Semi-major axis
7,867.295 km
Eccentricity
0.00122
Inclination
82.4826°
RAAN
113.4932°
Arg. of periapsis
259.6957°
True anomaly
100.4123°
Mean anomaly
100.2748°
Eccentric anomaly
100.34355°
Mean motion
3.11032 °/min
Orbital period
115.74 mins
BSTAR
0.000099871
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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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2026-09-13 14:30:30.890Z | 157.046° SSE | 2026-09-13 14:38:30.890Z | 83.324° E | 47.11° | 2026-09-13 14:46:30.890Z | 18.773° NNE |
| 14 mins | 2026-09-13 16:28:30.890Z | 227.47° WSW | 2026-09-13 16:35:30.890Z | 293.363° NW | 37.305° | 2026-09-13 16:42:30.890Z | 351.29° N |
| 11 mins | 2026-09-14 00:42:30.890Z | 22.522° NE | 2026-09-14 00:47:30.890Z | 61.115° ENE | 22.07° | 2026-09-14 00:53:30.890Z | 108.555° ESE |
| 15 mins | 2026-09-14 02:38:30.890Z | 348.812° N | 2026-09-14 02:45:30.890Z | 278.132° WNW | 78.127° | 2026-09-14 02:53:30.890Z | 181.621° SSW |
| 6 mins | 2026-09-14 04:38:30.890Z | 301.943° NW | 2026-09-14 04:40:30.890Z | 287.518° WNW | 13.787° | 2026-09-14 04:44:30.890Z | 259.292° W |
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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