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, 1.1 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 COSMOS 249
1 3504U 68091A 26255.65495426 -.00000043 00000-0 22463-4 0 9996
2 3504 62.3416 52.5425 1015238 39.1907 327.8308 12.97206473731832Epoch: 2026-09-12T15:43Z
TLE epoch observation values (Epoch: 2026-09-12T15:43:08.048Z)
Latitude
-0°
Longitude
-174.90188°
Altitude
642.639 km
Speed
7.842 km/s
True Right ascension
03h 30m 10s
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
17:33:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,048.7 km
Perigee altitude
495.353 km
Semi-major axis
7,650.163 km
Eccentricity
0.10152
Inclination
62.3416°
RAAN
52.5425°
Arg. of periapsis
39.1907°
True anomaly
320.91245°
Mean anomaly
327.8308°
Eccentric anomaly
324.44868°
Mean motion
3.24367 °/min
Orbital period
110.99 mins
BSTAR
0.000022463
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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 | 2026-09-13 12:12:41.293Z | 194.447° SSW | 2026-09-13 12:15:41.293Z | 98.297° ESE | 50.087° | 2026-09-13 12:18:41.293Z | 45.568° ENE |
| 13 mins | 2026-09-13 19:56:41.293Z | 343.427° N | 2026-09-13 20:01:41.293Z | 52.917° ENE | 42.408° | 2026-09-13 20:09:41.293Z | 118.04° SE |
| 13 mins | 2026-09-13 21:51:41.293Z | 303.356° NW | 2026-09-13 21:56:41.293Z | 235.004° WSW | 47.12° | 2026-09-13 22:04:41.293Z | 173.073° 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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