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COSMOS 2550, 48865

Orbit data source: Space-Track

COSMOS 2550, 48865 is a payload satellite owned by VVKO VKS (CIS) in LEO that was launched on Fri, 25 Jun 2021 UTC via a SOYUZ-2-1B 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/48865?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

48865, 2021-056A

Orbit

LEO

Last TLE update

7 hours ago

Origin

Russian Space Forces (CIS)

Manufacturer

TSSKBP/ARSLO

Mission

Operational Defense Sigint

Bus & Motor

PION-NKS, Unknown motor

Mass

7,231 kg wet, ~6,700 kg dry

Launch date (UTC)

2021-06-25 (4 years ago)

Launch vehicle

SOYUZ-2-1B

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 2 Pan, 4.3 m

Radar Cross Section

24.037 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 7 hours ago

0 COSMOS 2550
1 48865U 21056A   25211.87679842  .00011330  00000-0  34968-3 0  9998
2 48865  67.1446 351.9392 0008330 270.8401  89.1799 15.33830039229459

Epoch: 2025-07-30T21:02Z

TLE epoch observation values (Epoch: 2025-07-30T21:02:35.383Z)

Latitude

-0.00003°

Longitude

87.54203°

Altitude

466.565 km

Speed

7.634 km/s

True Right ascension

23h 27m 45s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

-45.39777°

Longitude

-68.22005°

Altitude

476.758 km

Speed

7.629 km/s

Apparent Right ascension

09h 26m 50s

Apparent Declination

-57° 17' 09"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

17:53:59

Azimuth

224.683° SW

Elevation

-52.009°

Doppler factor

Orbital elements

Apogee altitude

468.339 km

Perigee altitude

456.942 km

Semi-major axis

6,840.778 km

Eccentricity

0.00083

Inclination

67.1446°

RAAN

351.9392°

Arg. of periapsis

270.8401°

True anomaly

89.27535°

Mean anomaly

89.1799°

Eccentric anomaly

89.22762°

Mean motion

3.83606 °/min

Orbital period

93.85 mins

BSTAR

0.00034968

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Other satellites on launch #56 in the year 2021 (2021-06-25 UTC)

SL-4 R/B, 48866 (Decayed)

COSMOS 2550 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.
6 mins	2025-07-31 11:16:16.003Z	219.776° SW	2025-07-31 11:19:16.003Z	279.599° WNW	40.555°	2025-07-31 11:22:16.003Z	18.729° NNE
4 mins	2025-07-31 19:30:16.003Z	22.267° NNE	2025-07-31 19:31:16.003Z	48.946° ENE	23.873°	2025-07-31 19:34:16.003Z	111.408° ESE

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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Authenticating...

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Check out COSMOS 2550, 48865 on other resources

View COSMOS 2550, 48865 on NASA - NSSDCA Website

View COSMOS 2550, 48865 on Heavens-Above

View COSMOS 2550, 48865 on Keep Track

View COSMOS 2550, 48865 on Celestrak

View COSMOS 2550, 48865 on Gunter's Space Page

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