COSMOS 2504, 40555
Orbit data source: Space-Track
COSMOS 2504, 40555 is a payload satellite owned by TsNIIKhM (CIS) in LEO that was launched on Tue, 31 Mar 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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40555 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
TsNIIKhM
Mission
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 Cyl + 1 Ant, 0.5 m
Radar Cross Section
0.352 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 22 hours ago
TLE from 22 hours ago
0 COSMOS 2504
1 40555U 15020D 26308.92750049 .00000264 00000-0 94803-4 0 9992
2 40555 82.5153 122.5377 0606627 251.7003 101.7264 13.61443816569342Epoch: 2026-11-04T22:15Z
TLE epoch observation values (Epoch: 2026-11-04T22:15:36.042Z)
Latitude
-0.00007°
Longitude
104.46873°
Altitude
1,150.288 km
Speed
7.22 km/s
True Right ascension
08h 10m 09s
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
16:23:25
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,476.871 km
Perigee altitude
578.365 km
Semi-major axis
7,405.755 km
Eccentricity
0.06066
Inclination
82.5153°
RAAN
122.5377°
Arg. of periapsis
251.7003°
True anomaly
108.4142°
Mean anomaly
101.7264°
Eccentric anomaly
105.08239°
Mean motion
3.40556 °/min
Orbital period
105.71 mins
BSTAR
0.000094803
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Other satellites on launch #20 in the year 2015 (2015-03-31 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 2504 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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-11-05 21:49:35.188Z | 24.004° NE | 2026-11-05 21:54:35.188Z | 64.723° ENE | 17.006° | 2026-11-05 21:57:35.188Z | 92.17° ESE |
| 13 mins | 2026-11-05 23:35:35.188Z | 352.168° N | 2026-11-05 23:42:35.188Z | 180.368° SSW | 81.345° | 2026-11-05 23:48:35.188Z | 174.901° S |
| 6 mins | 2026-11-06 01:24:35.188Z | 308.161° NW | 2026-11-06 01:27:35.188Z | 282.609° WNW | 14.665° | 2026-11-06 01:30:35.188Z | 256° W |
| 14 mins | 2026-11-06 11:24:35.188Z | 147.064° SSE | 2026-11-06 11:30:35.188Z | 88.712° E | 40.765° | 2026-11-06 11:38:35.188Z | 21.602° NNE |
| 15 mins | 2026-11-06 13:10:35.188Z | 217.141° SW | 2026-11-06 13:17:35.188Z | 291.804° WNW | 46.578° | 2026-11-06 13:25:35.188Z | 356.918° N |
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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