SL-8 R/B, 3577

Orbit data source: Space-Track

SL-8 R/B, 3577 is space debris in LEO originally from a launch on Sat, 30 Nov 1968 UTC launched from the Plesetsk Missile And Space Complex (PKMTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.

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https://www.satcat.com/sats-embedded/3577?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

3577, 1968-106B

Orbit

LEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

Yuzhnoe

Mission

Spacecraft

Bus & Motor

S3, Unknown motor

Mass

1,434 kg wet, 1,434 kg dry

Launch date (UTC)

1968-11-30 (57 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

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Last TLE update: 12 hours ago

TLE from 12 hours ago

0 SL-8 R/B
1 03577U 68106B   26141.17858256  .00000030  00000-0  12343-3 0  9998
2 03577  74.0538  28.2255 0034494  17.5325  99.6216 13.19136302765833

Epoch: 2026-05-21T04:17Z

TLE epoch observation values (Epoch: 2026-05-21T04:17:09.533Z)

Latitude

58.58992°

Longitude

-122.63734°

Altitude

1,202 km

Speed

7.256 km/s

True Right ascension

12h 01m 55s

True Declination

58° 26' 45"

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

01:16:48

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,211.865 km

Perigee altitude

1,159.684 km

Semi-major axis

7,563.911 km

Eccentricity

0.00345

Inclination

74.0538°

RAAN

28.2255°

Arg. of periapsis

17.5325°

True anomaly

100.01103°

Mean anomaly

99.6216°

Eccentric anomaly

99.81634°

Mean motion

3.29931 °/min

Orbital period

109.11 mins

BSTAR

0.00012343

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

COSMOS 256, 3576

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SL-8 R/B 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.
11 mins	2026-05-21 16:31:59.185Z	152.977° SSE	2026-05-21 16:37:59.185Z	94.227° ESE	26.393°	2026-05-21 16:42:59.185Z	43.889° NE
12 mins	2026-05-21 18:22:59.185Z	224.345° SW	2026-05-21 18:28:59.185Z	300.794° NW	37.106°	2026-05-21 18:34:59.185Z	6.994° NNE
9 mins	2026-05-22 02:06:59.185Z	14.743° NNE	2026-05-22 02:10:59.185Z	52.649° ENE	19.943°	2026-05-22 02:15:59.185Z	98.089° ESE
13 mins	2026-05-22 03:56:59.185Z	337.74° N	2026-05-22 04:02:59.185Z	276.046° WNW	44.325°	2026-05-22 04:09:59.185Z	169.403° S
7 mins	2026-05-22 16:12:59.185Z	139.212° SSE	2026-05-22 16:16:59.185Z	99.83° ESE	22.735°	2026-05-22 16:19:59.185Z	65.102° ENE

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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 SL-8 R/B, 3577 on other resources

View SL-8 R/B, 3577 on Heavens-Above

View SL-8 R/B, 3577 on Keep Track

View SL-8 R/B, 3577 on Celestrak

View SL-8 R/B, 3577 on Gunter's Space Page

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

SL-8 R/B, 3577

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-05-21T04:17:09.533Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

SL-8 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-8 R/B, 3577 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago