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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: 6 hours ago

TLE from 6 hours ago

0 COSMOS 81
1 01571U 65070B   26120.56393243 -.00000073  00000-0  14781-3 0  9993
2 01571  56.0619 329.6714 0088690  25.8493   0.0078 12.48867837766678

Epoch: 2026-04-30T13:32Z

TLE epoch observation values (Epoch: 2026-04-30T13:32:03.761Z)

Latitude

21.252°

Longitude

-76.75795°

Altitude

1,400.419 km

Speed

7.194 km/s

True Right ascension

22h 59m 03s

True Declination

21° 08' 44"

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

02:42:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,538.653 km

Perigee altitude

1,399.46 km

Semi-major axis

7,847.194 km

Eccentricity

0.00887

Inclination

56.0619°

RAAN

329.6714°

Arg. of periapsis

25.8493°

True anomaly

0.00794°

Mean anomaly

0.0078°

Eccentric anomaly

0.00787°

Mean motion

3.12228 °/min

Orbital period

115.3 mins

BSTAR

0.00014781

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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.
13 mins	2026-04-30 19:28:42.462Z	295.513° NW	2026-04-30 19:34:42.462Z	344.371° N	25.697°	2026-04-30 19:41:42.462Z	43.683° NE
13 mins	2026-04-30 21:32:42.462Z	325.477° NNW	2026-04-30 21:38:42.462Z	22.047° NNE	28.386°	2026-04-30 21:45:42.462Z	77.739° E
16 mins	2026-04-30 23:32:42.462Z	317.4° NNW	2026-04-30 23:40:42.462Z	67.175° ENE	43.865°	2026-04-30 23:48:42.462Z	127.452° SE
14 mins	2026-05-01 01:33:42.462Z	294.213° NW	2026-05-01 01:39:42.462Z	246.154° WSW	27.632°	2026-05-01 01:47:42.462Z	183.354° SSW
11 mins	2026-05-01 14:29:42.462Z	158.566° S	2026-05-01 14:34:42.462Z	114.399° SE	23.136°	2026-05-01 14:40:42.462Z	67.749° E
15 mins	2026-05-01 16:26:42.462Z	227.341° WSW	2026-05-01 16:33:42.462Z	276.148° WNW	44.71°	2026-05-01 16:41:42.462Z	44.413° NE
13 mins	2026-05-01 18:29:42.462Z	283.925° WNW	2026-05-01 18:35:42.462Z	340.635° N	29.342°	2026-05-01 18:42:42.462Z	40.167° 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: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-04-30T13:32:03.761Z)

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: 6 hours ago