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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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https://www.satcat.com/sats-embedded/3576?theme=dark&initialShowStats=false

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Identifier

3576, 1968-106A

Orbit

LEO

Country

CIS

Related business

Federal Space Agency of Russia (Roscosmos) (RU)

Manufacturer

OKB-10

Mission

Spacecraft

Bus & Motor

KAUR-1 11F621, Unknown motor

Mass

800 kg wet, 800 kg dry

Launch date (UTC)

1968-11-30 (57 years ago)

Launch vehicle

KOSMOS 11K65M

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 COSMOS 256
1  3576U 68106A   26008.33399167 -.00000238  00000-0 -56861-3 0  9993
2  3576  74.0507 330.8079 0033496   4.0384 105.2087 13.16877786744653

Epoch: 2026-01-08T08:00Z

TLE epoch observation values (Epoch: 2026-01-08T08:00:56.880Z)

Latitude

65.01059°

Longitude

-114.91337°

Altitude

1,214.263 km

Speed

7.25 km/s

True Right ascension

07h 32m 51s

True Declination

64° 53' 12"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

16:51:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,219.791 km

Perigee altitude

1,169.061 km

Semi-major axis

7,572.563 km

Eccentricity

0.00335

Inclination

74.0507°

RAAN

330.8079°

Arg. of periapsis

4.0384°

True anomaly

105.57868°

Mean anomaly

105.2087°

Eccentric anomaly

105.39373°

Mean motion

3.29366 °/min

Orbital period

109.3 mins

BSTAR

-0.00056861

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Other satellites on launch #106 in the year 1968 (1968-11-30 UTC)

SL-8 R/B, 3577

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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.
14 mins	2026-01-08 22:08:09.980Z	181.289° SSW	2026-01-08 22:15:09.980Z	100.8° ESE	41.237°	2026-01-08 22:22:09.980Z	25.968° NE
9 mins	2026-01-09 00:03:09.980Z	260.983° W	2026-01-09 00:07:09.980Z	304.288° NW	23.836°	2026-01-09 00:12:09.980Z	353.279° N
12 mins	2026-01-09 07:45:09.980Z	1.072° NNE	2026-01-09 07:50:09.980Z	57.815° ENE	32.937°	2026-01-09 07:57:09.980Z	130.229° SE
12 mins	2026-01-09 09:36:09.980Z	322.018° NNW	2026-01-09 09:42:09.980Z	255.182° W	32.161°	2026-01-09 09:48:09.980Z	197.329° SSW

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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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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

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Check out COSMOS 256, 3576 on other resources

View COSMOS 256, 3576 on NASA - NSSDCA Website

View COSMOS 256, 3576 on Heavens-Above

View COSMOS 256, 3576 on Keep Track

View COSMOS 256, 3576 on Celestrak

View COSMOS 256, 3576 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

COSMOS 256, 3576

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-01-08T08:00:56.880Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #106 in the year 1968 (1968-11-30 UTC)

COSMOS 256 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 256, 3576 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago