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COSMOS 447, 5550

Orbit data source: Space-Track

COSMOS 447, 5550 is a payload satellite owned by OKB-10 (CIS) in LEO that was launched on Wed, 13 Oct 1971 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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Iframe URL

https://www.satcat.com/sats-embedded/5550?theme=dark&initialShowStats=false

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ISO8601 Format

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ISO8601 Format

Identifier

5550, 1971-086D

Orbit

LEO

Country

CIS

Related business

Federal Space Agency of Russia (Roscosmos) (RU)

Manufacturer

OKB-10

Mission

Spacecraft

Bus & Motor

STRELA-1 11F625, Unknown motor

Mass

60 kg wet, 60 kg dry

Launch date (UTC)

1971-10-13 (55 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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 COSMOS 447
1  5550U 71086D   26171.40674580  .00000001  00000-0  11121-3 0  9998
2  5550  74.0296 304.7534 0066355 318.3357  97.1723 12.50623564496604

Epoch: 2026-06-20T09:45Z

TLE epoch observation values (Epoch: 2026-06-20T09:45:42.837Z)

Latitude

53.18°

Longitude

-87.9384°

Altitude

1,477.007 km

Speed

7.127 km/s

True Right ascension

21h 48m 26s

True Declination

53° 01' 48"

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

23:07:22

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,511.73 km

Perigee altitude

1,407.714 km

Semi-major axis

7,837.859 km

Eccentricity

0.00664

Inclination

74.0296°

RAAN

304.7534°

Arg. of periapsis

318.3357°

True anomaly

97.92592°

Mean anomaly

97.1723°

Eccentric anomaly

97.54919°

Mean motion

3.12786 °/min

Orbital period

115.09 mins

BSTAR

0.00011121

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Other satellites on launch #86 in the year 1971 (1971-10-13 UTC)

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COSMOS 447 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.
10 mins	2026-06-22 17:43:06.020Z	11.57° NNE	2026-06-22 17:48:06.020Z	47.79° ENE	16.382°	2026-06-22 17:53:06.020Z	82.948° E
15 mins	2026-06-22 19:40:06.020Z	346.796° N	2026-06-22 19:47:06.020Z	65.049° ENE	43.532°	2026-06-22 19:55:06.020Z	152.18° SSE
11 mins	2026-06-22 21:39:06.020Z	306.721° NW	2026-06-22 21:44:06.020Z	265.049° W	22.538°	2026-06-22 21:50:06.020Z	220.311° SW
13 mins	2026-06-23 08:36:06.020Z	150.65° SSE	2026-06-23 08:42:06.020Z	93.672° ESE	29.9°	2026-06-23 08:49:06.020Z	36.655° NE
15 mins	2026-06-23 10:32:06.020Z	224.66° SW	2026-06-23 10:39:06.020Z	296.646° NW	37.915°	2026-06-23 10:47:06.020Z	9.746° NNE

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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 447, 5550 on other resources

View COSMOS 447, 5550 on NASA - NSSDCA Website

View COSMOS 447, 5550 on Heavens-Above

View COSMOS 447, 5550 on Keep Track

View COSMOS 447, 5550 on Celestrak

View COSMOS 447, 5550 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 447, 5550

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T09:45:42.837Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #86 in the year 1971 (1971-10-13 UTC)

COSMOS 447 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 447, 5550 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago