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COSMOS 2146, 21302

Orbit data source: Space-Track

COSMOS 2146, 21302 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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https://www.satcat.com/sats-embedded/21302?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21302, 1991-033D

Orbit

LEO

Last TLE update

11 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 11 hours ago

0 COSMOS 2146
1 21302U 91033D   25198.29627844  .00000034  00000-0  12341-3 0  9992
2 21302  82.5772 149.0464 0017427  71.6401 288.6585 12.64543235576992

Epoch: 2025-07-17T07:06Z

TLE epoch observation values (Epoch: 2025-07-17T07:06:38.457Z)

Latitude

-0.00001°

Longitude

107.02204°

Altitude

1,402.663 km

Speed

7.161 km/s

True Right ascension

09h 56m 11s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-51.31543°

Longitude

97.40762°

Altitude

1,431.318 km

Speed

7.142 km/s

Apparent Right ascension

14h 07m 52s

Apparent Declination

-73° 42' 15"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

06:56:38

Azimuth

158.583° S

Elevation

-42.977°

Doppler factor

Orbital elements

Apogee altitude

1,415.123 km

Perigee altitude

1,388.008 km

Semi-major axis

7,779.703 km

Eccentricity

0.00174

Inclination

82.5772°

RAAN

149.0464°

Arg. of periapsis

71.6401°

True anomaly

Unknown

Mean anomaly

288.6585°

Eccentric anomaly

Unknown

Mean motion

3.163 °/min

Orbital period

113.82 mins

BSTAR

0.00012341

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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 2146 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.
14 mins	2025-07-17 20:29:49.903Z	149.571° SSE	2025-07-17 20:36:49.903Z	85.704° E	32.09°	2025-07-17 20:43:49.903Z	23.576° NE
14 mins	2025-07-17 22:24:49.903Z	219.954° SW	2025-07-17 22:31:49.903Z	292.443° WNW	33.833°	2025-07-17 22:38:49.903Z	354.019° N
6 mins	2025-07-18 06:32:49.903Z	40.389° NE	2025-07-18 06:35:49.903Z	63.832° ENE	14.028°	2025-07-18 06:38:49.903Z	86.556° E
15 mins	2025-07-18 08:24:49.903Z	356.138° N	2025-07-18 08:31:49.903Z	90.951° ESE	44.346°	2025-07-18 08:39:49.903Z	168.374° S
9 mins	2025-07-18 10:21:49.903Z	311.585° NW	2025-07-18 10:25:49.903Z	277.486° WNW	18.759°	2025-07-18 10:30:49.903Z	239.09° WSW

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 2146, 21302 on other resources

View COSMOS 2146, 21302 on NASA - NSSDCA Website

View COSMOS 2146, 21302 on Heavens-Above

View COSMOS 2146, 21302 on Keep Track

View COSMOS 2146, 21302 on Celestrak

View COSMOS 2146, 21302 on Gunter's Space Page

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