COSMOS 2539, 44457
Orbit data source: Space-Track
COSMOS 2539, 44457 is a Commonwealth of Independent States-origin payload satellite in GEO that was launched on Mon, 05 Aug 2019 UTC via a PROTON-M/BRIZ-M launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). 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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44457 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Resehetnev ISS
Mission
Operational Defense Communications
Bus & Motor
EKSPRESS-2000?, AOCS
Mass
3,162 kg wet, ~2,000 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 2 Pan, 13.5 m
Radar Cross Section
24.423 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 COSMOS 2539
1 44457U 19048A 26171.89345437 .00000078 00000-0 00000+0 0 9990
2 44457 0.0385 91.7737 0000452 16.4031 134.5612 1.00275171 25263Epoch: 2026-06-20T21:26Z
TLE epoch observation values (Epoch: 2026-06-20T21:26:34.457Z)
Latitude
0.00101°
Longitude
12.00835°
Altitude
35,786.481 km
Speed
3.075 km/s
True Right ascension
16h 11m 00s
True Declination
0° 00' 04"
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
21:30:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,788.622 km
Perigee altitude
35,784.81 km
Semi-major axis
42,164.853 km
Eccentricity
0.00005
Inclination
0.0385°
RAAN
91.7737°
Arg. of periapsis
16.4031°
True anomaly
134.56489°
Mean anomaly
134.5612°
Eccentric anomaly
134.56305°
Mean motion
0.25068 °/min
Orbital period
1,436.1 mins
BSTAR
0
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Other satellites on launch #48 in the year 2019 (2019-08-05 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 2539 Visibility
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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. |
|---|---|---|---|---|---|---|---|
| COSMOS 2539 is likely not visible in the next few days. |
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44457 neighbors
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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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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 descending order |
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