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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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ISO8601 Format

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: 10 hours ago

TLE from 10 hours ago

0 COSMOS 256
1 03576U 68106A   26141.26943601 -.00000084  00000-0 -16932-3 0  9995
2 03576  74.0460 131.5505 0033156 140.9418 318.3782 13.16882922762154

Epoch: 2026-05-21T06:27Z

TLE epoch observation values (Epoch: 2026-05-21T06:27:59.271Z)

Latitude

71.7894°

Longitude

-84.19489°

Altitude

1,189.938 km

Speed

7.274 km/s

True Right ascension

16h 46m 52s

True Declination

71° 41' 34"

Sunlit

Object was in daylight 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

01:30:08

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,219.514 km

Perigee altitude

1,169.299 km

Semi-major axis

7,572.543 km

Eccentricity

0.00332

Inclination

74.046°

RAAN

131.5505°

Arg. of periapsis

140.9418°

True anomaly

318.12506°

Mean anomaly

318.3782°

Eccentric anomaly

318.25171°

Mean motion

3.29367 °/min

Orbital period

109.3 mins

BSTAR

-0.00016932

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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.
13 mins	2026-05-22 00:18:17.248Z	187.177° SSW	2026-05-22 00:24:17.248Z	105.14° ESE	43.837°	2026-05-22 00:31:17.248Z	22.983° NE
9 mins	2026-05-22 02:12:17.248Z	264.479° W	2026-05-22 02:16:17.248Z	302.807° NW	20.933°	2026-05-22 02:21:17.248Z	350.13° N
12 mins	2026-05-22 09:54:17.248Z	357.169° N	2026-05-22 09:59:17.248Z	55.935° ENE	36.054°	2026-05-22 10:06:17.248Z	136.552° SSE
10 mins	2026-05-22 11:46:17.248Z	313.242° NW	2026-05-22 11:51:17.248Z	256.102° W	27.442°	2026-05-22 11:56:17.248Z	207.282° SW

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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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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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-05-21T06:27:59.271Z)

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: 10 hours ago