COSMOS 256, 3576
Orbit data source: Space-Track
COSMOS 256, 3576 is a payload satellite owned by OKB-10 (CIS) in LEO that was launched on Sat, 30 Nov 1968 UTC via a KOSMOS 11K65M launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). 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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3576 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
OKB-10
Mission
Spacecraft
Bus & Motor
KAUR-1 11F621, Unknown motor
Mass
800 kg wet, 800 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: 10 hours ago
TLE from 10 hours ago
0 COSMOS 256
1 3576U 68106A 25296.66517610 -.00000100 00000-0 -21045-3 0 9996
2 3576 74.0471 85.7278 0033087 136.8949 234.7395 13.16873784734560Epoch: 2025-10-23T15:57Z
TLE epoch observation values (Epoch: 2025-10-23T15:57:51.215Z)
Latitude
10.8425°
Longitude
177.06586°
Altitude
1,212.926 km
Speed
7.242 km/s
True Right ascension
05h 55m 24s
True Declination
10° 46' 59"
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
21:12:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,219.497 km
Perigee altitude
1,169.386 km
Semi-major axis
7,572.578 km
Eccentricity
0.00331
Inclination
74.0471°
RAAN
85.7278°
Arg. of periapsis
136.8949°
True anomaly
234.43065°
Mean anomaly
234.7395°
Eccentric anomaly
234.585°
Mean motion
3.29365 °/min
Orbital period
109.3 mins
BSTAR
-0.00021045
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Other satellites on launch #106 in the year 1968 (1968-11-30 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 256 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. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2025-10-24 10:14:19.307Z | 157.862° S | 2025-10-24 10:20:19.307Z | 96.746° ESE | 29.985° | 2025-10-24 10:26:19.307Z | 37.684° NE |
| 12 mins | 2025-10-24 12:06:19.307Z | 232.504° WSW | 2025-10-24 12:11:19.307Z | 291.618° WNW | 34.613° | 2025-10-24 12:18:19.307Z | 6.705° NNE |
| 10 mins | 2025-10-24 19:50:19.307Z | 11.596° NNE | 2025-10-24 19:54:19.307Z | 50.604° ENE | 21.986° | 2025-10-24 20:00:19.307Z | 107.003° ESE |
| 12 mins | 2025-10-24 21:41:19.307Z | 333.309° NNW | 2025-10-24 21:47:19.307Z | 232.442° WSW | 42.294° | 2025-10-24 21:53:19.307Z | 175.78° S |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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