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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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Iframe URL

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

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ISO8601 Format

Identifier

1571, 1965-070B

Orbit

LEO

Last TLE update

15 hours ago

Origin

Federal Space Agency of Russia (Roscosmos) (CIS)

Manufacturer

OKB-10

Mission

Defense Communications

Bus & Motor

STRELA-1 11F610, Unknown motor

Mass

50 kg wet, 50 kg dry

Launch date (UTC)

1965-09-03 (60 years ago)

Launch vehicle

KOSMOS 65S3

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Poly, 0.4 m

Radar Cross Section

0.731 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 15 hours ago

0 COSMOS 81
1 01571U 65070B   25200.74744679 -.00000095  00000-0  11063-5 0  9990
2 01571  56.0617  16.6756 0088005   2.8951   9.6879 12.48862768731099

Epoch: 2025-07-19T17:56Z

TLE epoch observation values (Epoch: 2025-07-19T17:56:19.402Z)

Latitude

10.53712°

Longitude

176.96961°

Altitude

1,401.507 km

Speed

7.192 km/s

True Right ascension

01h 35m 19s

True Declination

10° 28' 50"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-11.01327°

Longitude

160.61731°

Altitude

1,406.275 km

Speed

7.187 km/s

Apparent Right ascension

03h 02m 47s

Apparent Declination

-49° 36' 41"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

22:03:29

Azimuth

137.937° SSE

Elevation

-21.017°

Doppler factor

Orbital elements

Apogee altitude

1,538.137 km

Perigee altitude

1,400.019 km

Semi-major axis

7,847.215 km

Eccentricity

0.0088

Inclination

56.0617°

RAAN

16.6756°

Arg. of periapsis

2.8951°

True anomaly

9.85946°

Mean anomaly

9.6879°

Eccentric anomaly

9.7735°

Mean motion

3.12227 °/min

Orbital period

115.3 mins

BSTAR

0.0000011063

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

COSMOS 81 Visibility forecast

Observer location: undefined°, undefined°

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	2025-07-20 13:11:20.386Z	192.638° SSW	2025-07-20 13:18:20.386Z	129.205° SE	36.392°	2025-07-20 13:26:20.386Z	55.124° ENE
15 mins	2025-07-20 15:12:20.386Z	252.259° W	2025-07-20 15:19:20.386Z	333.206° NNW	39.211°	2025-07-20 15:27:20.386Z	41.534° NE
13 mins	2025-07-20 17:15:20.386Z	299.157° NW	2025-07-20 17:21:20.386Z	349.744° N	25.805°	2025-07-20 17:28:20.386Z	46.133° ENE
14 mins	2025-07-20 19:18:20.386Z	322.811° NNW	2025-07-20 19:24:20.386Z	14.816° NNE	29.231°	2025-07-20 19:32:20.386Z	80.691° E
16 mins	2025-07-20 21:19:20.386Z	317.09° NNW	2025-07-20 21:26:20.386Z	27.268° NE	44.463°	2025-07-20 21:35:20.386Z	130.298° SE
13 mins	2025-07-20 23:20:20.386Z	291.175° WNW	2025-07-20 23:26:20.386Z	241.96° WSW	26.438°	2025-07-20 23:33:20.386Z	188.146° SSW

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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Authenticating...

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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

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