COSMOS 249, 3504
Orbit data source: Space-Track
COSMOS 249, 3504 is a payload satellite owned by PKO (CIS) in LEO that was launched on Sun, 20 Oct 1968 UTC via a TSIKLON-2A 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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3504 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
TSKBM/KB1
Mission
Spacecraft
Bus & Motor
IS, Unknown motor
Mass
1,400 kg wet, ~1,400 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
CYL + TRUSS, 2.1 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 14 hours ago
TLE from 14 hours ago
0 COSMOS 249
1 03504U 68091A 26207.32167801 .00000418 00000-0 14624-3 0 9994
2 03504 62.3411 173.2055 1012181 29.3523 336.0612 12.97178410725568Epoch: 2026-07-26T07:43Z
TLE epoch observation values (Epoch: 2026-07-26T07:43:12.980Z)
Latitude
0.00001°
Longitude
113.38014°
Altitude
581.827 km
Speed
7.905 km/s
True Right ascension
11h 32m 49s
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
10:41:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,046.483 km
Perigee altitude
497.791 km
Semi-major axis
7,650.274 km
Eccentricity
0.10122
Inclination
62.3411°
RAAN
173.2055°
Arg. of periapsis
29.3523°
True anomaly
330.75094°
Mean anomaly
336.0612°
Eccentric anomaly
333.4709°
Mean motion
3.2436 °/min
Orbital period
110.99 mins
BSTAR
0.00014624
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Other satellites on launch #91 in the year 1968 (1968-10-20 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 249 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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-07-27 00:33:09.868Z | 260.341° W | 2026-07-27 00:35:09.868Z | 308.785° NW | 28.529° | 2026-07-27 00:39:09.868Z | 20.118° NNE |
| 10 mins | 2026-07-27 06:23:09.868Z | 357.548° N | 2026-07-27 06:27:09.868Z | 43.243° NE | 23.561° | 2026-07-27 06:33:09.868Z | 91.007° ESE |
| 15 mins | 2026-07-27 08:17:09.868Z | 323.522° NNW | 2026-07-27 08:22:09.868Z | 290.423° WNW | 44.899° | 2026-07-27 08:32:09.868Z | 148.675° SSE |
| 11 mins | 2026-07-27 10:13:09.868Z | 280.253° WNW | 2026-07-27 10:17:09.868Z | 247.471° WSW | 20.014° | 2026-07-27 10:24:09.868Z | 204.828° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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