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: 8 hours ago
TLE from 8 hours ago
0 COSMOS 249
1 03504U 68091A 26098.24061499 .00000428 00000-0 15592-3 0 9995
2 03504 62.3438 85.4174 1003909 7.1657 354.2528 12.97122664711410Epoch: 2026-04-08T05:46Z
TLE epoch observation values (Epoch: 2026-04-08T05:46:29.135Z)
Latitude
0.00007°
Longitude
162.29023°
Altitude
511.6 km
Speed
7.979 km/s
True Right ascension
05h 41m 40s
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
20:22:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,040.396 km
Perigee altitude
504.316 km
Semi-major axis
7,650.493 km
Eccentricity
0.10039
Inclination
62.3438°
RAAN
85.4174°
Arg. of periapsis
7.1657°
True anomaly
352.93766°
Mean anomaly
354.2528°
Eccentric anomaly
353.61292°
Mean motion
3.24346 °/min
Orbital period
110.99 mins
BSTAR
0.00015592
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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 | 2026-04-09 00:24:28.336Z | 176° S | 2026-04-09 00:27:28.336Z | 111.193° ESE | 29.992° | 2026-04-09 00:31:28.336Z | 51.397° ENE |
| 7 mins | 2026-04-09 02:19:28.336Z | 277.196° WNW | 2026-04-09 02:22:28.336Z | 330.559° NNW | 23.411° | 2026-04-09 02:26:28.336Z | 17.413° NNE |
| 8 mins | 2026-04-09 06:14:28.336Z | 352.957° N | 2026-04-09 06:18:28.336Z | 26.712° NE | 14.654° | 2026-04-09 06:22:28.336Z | 54.027° ENE |
| 15 mins | 2026-04-09 08:09:28.336Z | 344.44° N | 2026-04-09 08:15:28.336Z | 50.255° ENE | 33.696° | 2026-04-09 08:24:28.336Z | 111.187° ESE |
| 18 mins | 2026-04-09 10:03:28.336Z | 315.888° NNW | 2026-04-09 10:10:28.336Z | 245.099° WSW | 42.21° | 2026-04-09 10:21:28.336Z | 162.796° S |
| 9 mins | 2026-04-09 12:01:28.336Z | 275.822° WNW | 2026-04-09 12:05:28.336Z | 251.083° W | 15.194° | 2026-04-09 12:10:28.336Z | 224.399° 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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