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COSMOS 1641, 15623

Orbit data source: Space-Track

COSMOS 1641, 15623 is a payload satellite in LEO that was launched on Thu, 21 Mar 1985 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 src="https://www.satcat.com/sats-embedded/15623?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/15623?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

15623, 1985-023G

Orbit

LEO

Last TLE update

1 day ago

Origin

Russian Space Forces (RU)

Manufacturer

NPO PM

Mission

Defense Communications

Bus & Motor

STRELA-1 11F625, Unknown motor

Mass

60 kg wet, 60 kg dry

Launch date (UTC)

1985-03-21 (40 years ago)

Launch vehicle

KOSMOS 11K65M

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Sphere, 0.8 m

Radar Cross Section

0.588 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 1 day ago

0 COSMOS 1641
1 15623U 85023G   25141.35273062 -.00000014  00000-0  83794-5 0  9998
2 15623  74.0573   0.6240 0043655 153.8219  18.7880 12.54555228839583

Epoch: 2025-05-21T08:27Z

TLE epoch observation values (Epoch: 2025-05-21T08:27:55.925Z)

Latitude

6.88636°

Longitude

172.43578°

Altitude

1,414.937 km

Speed

7.168 km/s

True Right ascension

11h 54m 37s

True Declination

6° 50' 56"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-32.09074°

Longitude

-176.94073°

Altitude

1,440.549 km

Speed

7.148 km/s

Apparent Right ascension

11h 40m 57s

Apparent Declination

-36° 34' 29"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

22:24:18

Azimuth

276.433° WNW

Elevation

-74.615°

Doppler factor

Orbital elements

Apogee altitude

1,477.471 km

Perigee altitude

1,409.182 km

Semi-major axis

7,821.464 km

Eccentricity

0.00437

Inclination

74.0573°

RAAN

0.624°

Arg. of periapsis

153.8219°

True anomaly

Unknown

Mean anomaly

18.788°

Eccentric anomaly

Unknown

Mean motion

3.1377 °/min

Orbital period

114.73 mins

BSTAR

0.0000083794

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Other satellites on launch #23 in the year 1985 (1985-03-21 UTC)

COSMOS 1641 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.
13 mins	2025-05-22 14:16:04.510Z	145.39° SSE	2025-05-22 14:22:04.510Z	98.602° ESE	24.862°	2025-05-22 14:29:04.510Z	41.794° NE
15 mins	2025-05-22 16:12:04.510Z	215.159° SW	2025-05-22 16:19:04.510Z	296.384° NW	41.694°	2025-05-22 16:27:04.510Z	12.884° NNE
7 mins	2025-05-22 18:15:04.510Z	294.005° NW	2025-05-22 18:18:04.510Z	316.088° NNW	13.825°	2025-05-22 18:22:04.510Z	344.864° N
12 mins	2025-05-23 00:20:04.510Z	4.784° NNE	2025-05-23 00:26:04.510Z	59.39° ENE	26.198°	2025-05-23 00:32:04.510Z	110.643° ESE
14 mins	2025-05-23 02:17:04.510Z	331.695° NNW	2025-05-23 02:23:04.510Z	270.628° WNW	41.428°	2025-05-23 02:31:04.510Z	179.827° S

Authenticating...

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Check out COSMOS 1641, 15623 on other resources

View COSMOS 1641, 15623 on NASA - NSSDCA Website

View COSMOS 1641, 15623 on Heavens-Above

View COSMOS 1641, 15623 on Keep Track

View COSMOS 1641, 15623 on Celestrak

View COSMOS 1641, 15623 on Gunter's Space Page

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