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COSMOS 2145, 21301

Orbit data source: Space-Track

COSMOS 2145, 21301 is a payload satellite owned by UNKS RF (CIS) in LEO that was launched on Thu, 16 May 1991 UTC via a TSIKLON-3 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/21301?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/21301?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21301, 1991-033C

Orbit

LEO

Last TLE update

9 hours ago

Origin

Russian Space Forces (CIS)

Manufacturer

NPO PM

Mission

Defense Communications

Bus & Motor

STRELA-3, Unknown motor

Mass

225 kg wet, 225 kg dry

Launch date (UTC)

1991-05-16 (34 years ago)

Launch vehicle

TSIKLON-3

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 0.8 m

Radar Cross Section

1.257 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 9 hours ago

0 COSMOS 2145
1 21301U 91033C   25198.39209193  .00000033  00000-0  12448-3 0  9992
2 21301  82.5678 161.5784 0009383 123.1615 237.0378 12.63203858575239

Epoch: 2025-07-17T09:24Z

TLE epoch observation values (Epoch: 2025-07-17T09:24:36.742Z)

Latitude

-0.00003°

Longitude

84.96674°

Altitude

1,416.46 km

Speed

7.151 km/s

True Right ascension

10h 46m 18s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-74.07772°

Longitude

-68.20579°

Altitude

1,441.851 km

Speed

7.138 km/s

Apparent Right ascension

20h 33m 54s

Apparent Declination

-64° 08' 01"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

07:04:35

Azimuth

201.028° SSW

Elevation

-62.487°

Doppler factor

Orbital elements

Apogee altitude

1,414.373 km

Perigee altitude

1,399.763 km

Semi-major axis

7,785.205 km

Eccentricity

0.00094

Inclination

82.5678°

RAAN

161.5784°

Arg. of periapsis

123.1615°

True anomaly

Unknown

Mean anomaly

237.0378°

Eccentric anomaly

Unknown

Mean motion

3.15964 °/min

Orbital period

113.94 mins

BSTAR

0.00012448

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Other satellites on launch #33 in the year 1991 (1991-05-16 UTC)

COSMOS 2143 DEB, 57720

COSMOS 2143 DEB, 57721

COSMOS 2143 DEB, 57722

COSMOS 2143 DEB, 57723

COSMOS 2143 DEB, 57724

COSMOS 2143 DEB, 57725

COSMOS 2145 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.
12 mins	2025-07-17 20:55:45.775Z	132.345° SE	2025-07-17 21:01:45.775Z	82.138° E	24.168°	2025-07-17 21:07:45.775Z	32.464° NE
14 mins	2025-07-17 22:49:45.775Z	205.581° SW	2025-07-17 22:55:45.775Z	273.49° WNW	41.145°	2025-07-17 23:03:45.775Z	0.349° NNE
14 mins	2025-07-18 08:50:45.775Z	5.067° NNE	2025-07-18 08:56:45.775Z	69.851° E	39.399°	2025-07-18 09:04:45.775Z	153.893° SSE
12 mins	2025-07-18 10:45:45.775Z	327.06° NNW	2025-07-18 10:51:45.775Z	272.849° WNW	26.135°	2025-07-18 10:57:45.775Z	222.78° SW

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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Check out COSMOS 2145, 21301 on other resources

View COSMOS 2145, 21301 on NASA - NSSDCA Website

View COSMOS 2145, 21301 on Heavens-Above

View COSMOS 2145, 21301 on Keep Track

View COSMOS 2145, 21301 on Celestrak

View COSMOS 2145, 21301 on Gunter's Space Page

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