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COSMOS 81, 1571

Orbit data source: Space-Track

COSMOS 81, 1571 is a payload satellite owned by OKB-10 (CIS) in LEO that was launched on Fri, 03 Sep 1965 UTC via a KOSMOS 65S3 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.

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https://www.satcat.com/sats-embedded/1571?theme=dark&initialShowStats=false

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Identifier

1571, 1965-070B

Orbit

LEO

Country

CIS

Related business

Federal Space Agency of Russia (Roscosmos) (RU)

Manufacturer

OKB-10

Mission

Spacecraft

Bus & Motor

STRELA-1 11F610, Unknown motor

Mass

50 kg wet, 50 kg dry

Launch date (UTC)

1965-09-03 (61 years ago)

Launch vehicle

KOSMOS 65S3

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 5 hours ago

TLE from 5 hours ago

0 COSMOS 81
1  1571U 65070B   26066.13116683 -.00000069  00000-0  16959-3 0  9990
2  1571  56.0593 116.2576 0086208 312.1822  75.0543 12.48867077759875

Epoch: 2026-03-07T03:08Z

TLE epoch observation values (Epoch: 2026-03-07T03:08:52.814Z)

Latitude

23.12379°

Longitude

-79.20242°

Altitude

1,453.317 km

Speed

7.146 km/s

True Right ascension

08h 51m 29s

True Declination

23° 00' 39"

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

11:46:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,536.709 km

Perigee altitude

1,401.411 km

Semi-major axis

7,847.197 km

Eccentricity

0.00862

Inclination

56.0593°

RAAN

116.2576°

Arg. of periapsis

312.1822°

True anomaly

76.01137°

Mean anomaly

75.0543°

Eccentric anomaly

75.53257°

Mean motion

3.12228 °/min

Orbital period

115.3 mins

BSTAR

0.00016959

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Other satellites on launch #70 in the year 1965 (1965-09-03 UTC)

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COSMOS 81 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.
15 mins	2026-03-07 09:05:14.087Z	296.471° NW	2026-03-07 09:12:14.087Z	349.068° N	26.025°	2026-03-07 09:20:14.087Z	50.693° ENE
15 mins	2026-03-07 11:09:14.087Z	322.563° NNW	2026-03-07 11:16:14.087Z	25.3° NE	30.821°	2026-03-07 11:24:14.087Z	86.156° E
16 mins	2026-03-07 13:10:14.087Z	315.416° NNW	2026-03-07 13:17:14.087Z	343.593° N	44.746°	2026-03-07 13:26:14.087Z	134.73° SE
13 mins	2026-03-07 15:11:14.087Z	290.133° WNW	2026-03-07 15:17:14.087Z	244.448° WSW	23.939°	2026-03-07 15:24:14.087Z	192.807° SSW
13 mins	2026-03-08 04:05:14.087Z	170.766° S	2026-03-08 04:11:14.087Z	116.902° SE	28.084°	2026-03-08 04:18:14.087Z	62.237° ENE
16 mins	2026-03-08 06:03:14.087Z	234.529° WSW	2026-03-08 06:11:14.087Z	334.301° NNW	43.735°	2026-03-08 06:19:14.087Z	43.106° NE

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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 81, 1571 on other resources

View COSMOS 81, 1571 on NASA - NSSDCA Website

View COSMOS 81, 1571 on Heavens-Above

View COSMOS 81, 1571 on Keep Track

View COSMOS 81, 1571 on Celestrak

View COSMOS 81, 1571 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 81, 1571

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2026-03-07T03:08:52.814Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #70 in the year 1965 (1965-09-03 UTC)

COSMOS 81 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 81, 1571 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 5 hours ago