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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
3504 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
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: 9 hours ago
TLE from 9 hours ago
0 COSMOS 249
1 3504U 68091A 25362.63435795 .00000650 00000-0 22894-3 0 9995
2 3504 62.3504 336.3551 0995816 346.5077 11.0965 12.97044936698369Epoch: 2025-12-28T15:13Z
TLE epoch observation values (Epoch: 2025-12-28T15:13:28.526Z)
Latitude
-0.00005°
Longitude
10.6427°
Altitude
530.86 km
Speed
7.959 km/s
True Right ascension
22h 25m 25s
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
23:55:20
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,034.54 km
Perigee altitude
510.782 km
Semi-major axis
7,650.798 km
Eccentricity
0.09958
Inclination
62.3504°
RAAN
336.3551°
Arg. of periapsis
346.5077°
True anomaly
13.59553°
Mean anomaly
11.0965°
Eccentric anomaly
12.31326°
Mean motion
3.24327 °/min
Orbital period
111 mins
BSTAR
0.00022894
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #91 in the year 1968 (1968-10-20 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-12-29 00:36:55.623Z | 218.85° SW | 2025-12-29 00:40:55.623Z | 319.54° NNW | 44.711° | 2025-12-29 00:46:55.623Z | 34.257° NE |
| 8 mins | 2025-12-29 02:33:55.623Z | 297.81° NW | 2025-12-29 02:36:55.623Z | 332.494° NNW | 19.614° | 2025-12-29 02:41:55.623Z | 17.52° NNE |
| 7 mins | 2025-12-29 04:32:55.623Z | 342.607° N | 2025-12-29 04:35:55.623Z | 6.465° NNE | 14.283° | 2025-12-29 04:39:55.623Z | 33.135° NE |
| 14 mins | 2025-12-29 06:28:55.623Z | 347.296° N | 2025-12-29 06:33:55.623Z | 27.695° NE | 24.288° | 2025-12-29 06:42:55.623Z | 83.684° E |
| 20 mins | 2025-12-29 08:22:55.623Z | 329.907° NNW | 2025-12-29 08:30:55.623Z | 41.215° NE | 43.149° | 2025-12-29 08:42:55.623Z | 134.59° SE |
| 19 mins | 2025-12-29 10:17:55.623Z | 307.808° NW | 2025-12-29 10:25:55.623Z | 252.673° W | 32.798° | 2025-12-29 10:36:55.623Z | 185.146° SSW |
| 4 mins | 2025-12-29 22:49:55.623Z | 120.912° SE | 2025-12-29 22:50:55.623Z | 107.162° ESE | 14.952° | 2025-12-29 22:53:55.623Z | 72.81° E |
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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
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 |
|---|