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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
39497 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
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: 9 hours ago
TLE from 9 hours ago
0 COSMOS 2491
1 39497U 13076E 25286.65560253 .00000016 00000-0 47953-4 0 9993
2 39497 82.4853 322.0135 0011799 267.9041 92.0687 12.43491501534617Epoch: 2025-10-13T15:44Z
TLE epoch observation values (Epoch: 2025-10-13T15:44:04.058Z)
Latitude
-0.00011°
Longitude
63.54132°
Altitude
1,494.883 km
Speed
7.117 km/s
True Right ascension
21h 28m 03s
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
19:06:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,498.471 km
Perigee altitude
1,479.905 km
Semi-major axis
7,867.325 km
Eccentricity
0.00118
Inclination
82.4853°
RAAN
322.0135°
Arg. of periapsis
267.9041°
True anomaly
92.20381°
Mean anomaly
92.0687°
Eccentric anomaly
92.13626°
Mean motion
3.1103 °/min
Orbital period
115.74 mins
BSTAR
0.000047953
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #76 in the year 2013 (2013-12-25 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2025-10-14 01:31:17.813Z | 119.269° SE | 2025-10-14 01:36:17.813Z | 81.717° E | 19.45° | 2025-10-14 01:42:17.813Z | 36.919° NE |
| 15 mins | 2025-10-14 03:25:17.813Z | 192.65° SSW | 2025-10-14 03:32:17.813Z | 280.257° WNW | 44.444° | 2025-10-14 03:40:17.813Z | 4.95° NNE |
| 8 mins | 2025-10-14 05:27:17.813Z | 275.223° WNW | 2025-10-14 05:30:17.813Z | 297.418° NW | 14.946° | 2025-10-14 05:35:17.813Z | 333.111° NNW |
| 15 mins | 2025-10-14 13:36:17.813Z | 6.199° NNE | 2025-10-14 13:43:17.813Z | 81.906° E | 37.875° | 2025-10-14 13:51:17.813Z | 150.527° SSE |
| 13 mins | 2025-10-14 15:33:17.813Z | 329.527° NNW | 2025-10-14 15:39:17.813Z | 276.829° WNW | 29.16° | 2025-10-14 15:46:17.813Z | 217.725° SW |
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 ascending order |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
|---|