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COSMOS 1638, 15620

Orbit data source: Space-Track

COSMOS 1638, 15620 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/15620?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/15620?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

15620, 1985-023D

Orbit

LEO

Last TLE update

3 hours 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 3 hours ago

0 COSMOS 1638
1 15620U 85023D   25142.50984432 -.00000011  00000-0  29874-4 0  9998
2 15620  74.0545 194.0267 0015288  28.4777  81.7971 12.49207176832138

Epoch: 2025-05-22T12:14Z

TLE epoch observation values (Epoch: 2025-05-22T12:14:10.549Z)

Latitude

64.37258°

Longitude

-86.24326°

Altitude

1,476.85 km

Speed

7.132 km/s

True Right ascension

22h 30m 42s

True Declination

64° 15' 02"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-25.5134°

Longitude

122.13381°

Altitude

1,469.881 km

Speed

7.13 km/s

Apparent Right ascension

12h 23m 34s

Apparent Declination

-31° 48' 44"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

00:22:37

Azimuth

358.573° N

Elevation

-81.894°

Doppler factor

Orbital elements

Apogee altitude

1,477.639 km

Perigee altitude

1,453.655 km

Semi-major axis

7,843.784 km

Eccentricity

0.00153

Inclination

74.0545°

RAAN

194.0267°

Arg. of periapsis

28.4777°

True anomaly

Unknown

Mean anomaly

81.7971°

Eccentric anomaly

Unknown

Mean motion

3.12431 °/min

Orbital period

115.23 mins

BSTAR

0.000029874

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

COSMOS 1638 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 16:08:04.212Z	319.853° NNW	2025-05-22 16:15:04.212Z	258.767° W	28.327°	2025-05-22 16:21:04.212Z	209.288° SW
12 mins	2025-05-23 03:08:04.212Z	140.025° SSE	2025-05-23 03:14:04.212Z	89.713° E	23.753°	2025-05-23 03:20:04.212Z	43.349° NE
16 mins	2025-05-23 05:03:04.212Z	211.998° SW	2025-05-23 05:11:04.212Z	308.598° NW	42.11°	2025-05-23 05:19:04.212Z	14.028° NNE
7 mins	2025-05-23 07:07:04.212Z	292.501° NW	2025-05-23 07:10:04.212Z	314.791° NW	14.425°	2025-05-23 07:14:04.212Z	343.977° N
12 mins	2025-05-23 13:14:04.212Z	6.178° NNE	2025-05-23 13:20:04.212Z	61.035° ENE	26.583°	2025-05-23 13:26:04.212Z	110.556° ESE
10 mins	2025-05-23 15:11:04.212Z	332.467° NNW	2025-05-23 15:18:04.212Z	250.393° W	41.873°	2025-05-23 15:21:04.212Z	194.988° SSW

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Check out COSMOS 1638, 15620 on other resources

View COSMOS 1638, 15620 on NASA - NSSDCA Website

View COSMOS 1638, 15620 on Heavens-Above

View COSMOS 1638, 15620 on Keep Track

View COSMOS 1638, 15620 on Celestrak

View COSMOS 1638, 15620 on Gunter's Space Page

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