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
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 COSMOS 249
1 3504U 68091A 26145.18834705 .00000043 00000-0 46786-4 0 9992
2 3504 62.3451 328.2775 1007091 16.7496 346.4341 12.97154118717504Epoch: 2026-05-25T04:31Z
TLE epoch observation values (Epoch: 2026-05-25T04:31:13.185Z)
Latitude
-0.00002°
Longitude
17.69283°
Altitude
530.76 km
Speed
7.959 km/s
True Right ascension
21h 53m 06s
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
18:42:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,042.694 km
Perigee altitude
501.77 km
Semi-major axis
7,650.369 km
Eccentricity
0.10071
Inclination
62.3451°
RAAN
328.2775°
Arg. of periapsis
16.7496°
True anomaly
343.35366°
Mean anomaly
346.4341°
Eccentric anomaly
344.93427°
Mean motion
3.24354 °/min
Orbital period
110.99 mins
BSTAR
0.000046786
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-05-25 13:54:40.289Z | 190.995° SSW | 2026-05-25 13:57:40.289Z | 100.4° ESE | 37.392° | 2026-05-25 14:01:40.289Z | 44.092° NE |
| 5 mins | 2026-05-25 15:50:40.289Z | 298.15° NW | 2026-05-25 15:52:40.289Z | 331.051° NNW | 17.451° | 2026-05-25 15:55:40.289Z | 8.71° NNE |
| 7 mins | 2026-05-25 19:45:40.289Z | 4.169° NNE | 2026-05-25 19:48:40.289Z | 31.352° NE | 14.834° | 2026-05-25 19:52:40.289Z | 59.964° ENE |
| 16 mins | 2026-05-25 21:38:40.289Z | 338.876° N | 2026-05-25 21:44:40.289Z | 45.601° ENE | 36.494° | 2026-05-25 21:54:40.289Z | 119.781° SE |
| 17 mins | 2026-05-25 23:33:40.289Z | 309.391° NW | 2026-05-25 23:39:40.289Z | 248.682° W | 38.402° | 2026-05-25 23:50:40.289Z | 170.135° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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