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COSMOS 2522 (GLONASS), 42939

Orbit data source: Space-Track

COSMOS 2522 (GLONASS), 42939 is a Commonwealth of Independent States-origin payload satellite in MEO that was launched on Fri, 22 Sep 2017 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/42939?theme=dark&initialShowStats=false

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Identifier

42939, 2017-055A

Orbit

MEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

Resehetnev ISS

Mission

Operational Defense Navigation

Bus & Motor

URAGAN, Unknown motor

Mass

1,450 kg wet, ~1,200 kg dry

Launch date (UTC)

2017-09-22 (9 years ago)

Launch vehicle

SOYUZ-2-1B

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 1 Ant + 2 Pan, 3.9 m

Radar Cross Section

8.467 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 COSMOS 2522 (GLONASS)
1 42939U 17055A   26171.87700781  .00000069  00000-0  00000+0 0  9994
2 42939  64.0794 191.7591 0011202 244.2944 115.6333  2.13101192 68058

Epoch: 2026-06-20T21:02Z

TLE epoch observation values (Epoch: 2026-06-20T21:02:53.474Z)

Latitude

0.00005°

Longitude

-33.04645°

Altitude

19,142.878 km

Speed

3.951 km/s

True Right ascension

12h 47m 02s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

21:28:09

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

19,158.173 km

Perigee altitude

19,101.025 km

Semi-major axis

25,507.736 km

Eccentricity

0.00112

Inclination

64.0794°

RAAN

191.7591°

Arg. of periapsis

244.2944°

True anomaly

115.74896°

Mean anomaly

115.6333°

Eccentric anomaly

115.69114°

Mean motion

0.53276 °/min

Orbital period

675.72 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #55 in the year 2017 (2017-09-22 UTC)

FREGAT R/B, 42940

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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COSMOS 2522 (GLONASS) Visibility forecast

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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.
171 mins	2026-06-22 10:26:08.430Z	14.095° NNE	2026-06-22 10:52:08.430Z	61.993° ENE	43.93°	2026-06-22 13:17:08.430Z	160.944° S
308 mins	2026-06-23 05:18:08.430Z	244.506° WSW	2026-06-23 08:41:08.430Z	24.163° NE	40.84°	2026-06-23 10:26:08.430Z	112.225° ESE

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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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out COSMOS 2522 (GLONASS), 42939 on other resources

View COSMOS 2522 (GLONASS), 42939 on NASA - NSSDCA Website

View COSMOS 2522 (GLONASS), 42939 on Heavens-Above

View COSMOS 2522 (GLONASS), 42939 on Keep Track

View COSMOS 2522 (GLONASS), 42939 on Celestrak

View COSMOS 2522 (GLONASS), 42939 on Gunter's Space Page

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

COSMOS 2522 (GLONASS), 42939

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T21:02:53.474Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #55 in the year 2017 (2017-09-22 UTC)

COSMOS 2522 (GLONASS) Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 2522 (GLONASS), 42939 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago