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Russian Federal Space Agency (ROSCOSMOS)Soyuz 2.1b Fregat-MCosmodrome Site 1S, Vostochny Cosmodrome, Siberia, Russian Federation

Ionosfera-M 3 & 4

Launched

July 25, 2025 · 05:54 UTC

Launch Successful

Image: Roscosmos

Summary

Ionosfera-M 3 & 4 launched on a Russian Federal Space Agency (ROSCOSMOS) Soyuz 2.1b Fregat-M from Cosmodrome Site 1S, Vostochny Cosmodrome, Siberia, Russian Federation on July 25, 2025 at 05:54 UTC. It was Russian Federal Space Agency (ROSCOSMOS)'s 333rd launch, 4th this year and humanity's 7,008th orbital launch attempt. It was the 33rd Soyuz 2.1b Fregat-M flight and the 3rd this year. The payload was bound for Sun-Synchronous Orbit (SSO). Ionosfera-M No. 3, one of 20 catalogued objects, reached a 826 × 830 km orbit inclined 98.6°. 20 objects from this launch are catalogued, all of them payloads.

Watch
Vehicle
Soyuz 2.1b Fregat-M · Russian Federal Space Agency (ROSCOSMOS)
Booster
No booster details on record.
Mission
Earth Science · Sun-Synchronous Orbit (SSO)
Milestone
33rd Soyuz 2.1b Fregat-M flight · 3rd this yearRussian Federal Space Agency (ROSCOSMOS)'s 333rd launch4th this yearhumanity's 7,008th orbital launch attempt159th orbital launch attempt this year

Webcast

Replay
Watch on YouTube

Flight preview

Orbit: as tracked

98.6°Inclination
826 × 830 kmPerigee × apogeefrom mean elements
101.3 minPeriodfrom mean elements
172.6°Ascending node
447 d agoElement epoch2025-07-25 16:18 UTC · stale

Ionosfera-M No. 3 · NORAD 64876 · 2025-155 · Space-Track · tracking 1 of 20 objects

Show the numbers for orbit elements
Object
IONOSFERA-M 03
Object ID
2025-155A
Epoch
2025-07-25 16:18:16 UTC
Mean motion
14.21336367 rev/day
Eccentricity
0.0002496
Inclination
98.5512°
Ascending node
172.6227°
Arg. of perigee
81.7648°
Mean anomaly
25.3115°
Element set
999
Rev at epoch
1
B*
0

Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: SSO. Ascent drawn from padside's representative profile.

Catalogued objects

20 catalogued: 20 payloads; 20 still in orbit

  • Ionosfera-M No. 3 · NORAD 64876 · in orbit
  • Ionosfera-M No. 4 · NORAD 64877 · in orbit
  • Innosat16 · NORAD 64878 · in orbit
  • Geoskan-6 · NORAD 64879 · in orbit
  • Geoskan-1 · NORAD 64880 · in orbit
  • 239Alferov · NORAD 64881 · in orbit
  • Geoskan-2 · NORAD 64890 · in orbit
  • Geoskan-5 · NORAD 64891 · in orbit
  • Geoskan-4 · NORAD 64892 · in orbit
  • Geoskan-3 · NORAD 64893 · in orbit
  • Innosat3 · NORAD 64894 · in orbit
  • CSTP-4.3 · in orbit
Show 8 more payloads
  • CSTP-4.2 · in orbit
  • CSTP-4.1 · in orbit
  • FSKL5695-14 · in orbit
  • FSKL5695-12 · in orbit
  • FSKL5695-13 · in orbit
  • FSKL5695-11 · in orbit
  • Nahid 2 · in orbit
  • CSTP-4.4 · in orbit

Data from J. McDowell, planet4589.org

About this launch

Ionosfera is a constellation of four ionospheric and magnetospheric research satellites developed by for Roscosmos for the project Ionozond. The satellites will operate on circular sun-synchronous orbits (SSO), at altitude of about 800 km and located in two orbital planes of two satellites each. The following science instruments are carried on the satellites: * SPER/1 Plasma and energy radiation spectrometer * SG/1 Gamma-ray spectrometer * GALS/1 Galactic cosmic ray spectrometer / 1 * LAERTES On-board Ionosonde * NBK/2 Low-frequency wave complex * ESEP Ionospheric plasma energy spectrometer * Ozonometer-TM Ozonometer * MayaK On-board radio transmitters * PES GPS-GLONASS device

Pad

Map of Cosmodrome Site 1S

Cosmodrome Site 1S, Vostochny Cosmodrome, Siberia, Russian Federation

19th launch from Cosmodrome Site 1S, 1st this year · 20th from Vostochny Cosmodrome, Siberia, Russian Federation

Local pad time at liftoff: Jul 25, 2:54 PM GMT+9, in daylight

20 launches from this pad · 21 from Vostochny Cosmodrome, Siberia, Russian Federation

237 days after the previous launch from this pad

All launches from Vostochny Cosmodrome, Siberia, Russian FederationOpen in maps

Updates

Launch success.

Cosmic_Penguin · Jul 25, 2025 · source

Show 6 earlier updates

  • Liftoff.

    Cosmic_Penguin · 7/25/2025 · source

  • Tweaked T-0.

    Cosmic_Penguin · 7/22/2025 · source

  • Added launch time.

    Cosmic_Penguin · 5/14/2025 · source

  • NET July 25.

    Cosmic_Penguin · 5/3/2025 · source

  • NET July 24.

    Cosmic_Penguin · 4/2/2025 · source

  • Added launch.

    Cosmic_Penguin · 2/3/2025 · source

Questions

When did Ionosfera-M 3 & 4 launch?

Ionosfera-M 3 & 4 launched on July 25, 2025 at 05:54 UTC.

Where can I watch Ionosfera-M 3 & 4?

Coverage: Трансляция запуска космических аппаратов «Ионосфера-М» № 3 и № 4. Watch the replay

What rocket launched Ionosfera-M 3 & 4?

Soyuz 2.1b Fregat-M, flown by Russian Federal Space Agency (ROSCOSMOS). Soyuz 2.1b Fregat-M spec sheet

Where did Ionosfera-M 3 & 4 launch from?

Cosmodrome Site 1S, Vostochny Cosmodrome, Siberia, Russian Federation. Liftoff was Jul 25, 2:54 PM GMT+9 local time at the pad.

What orbit did Ionosfera-M 3 & 4 reach?

Ionosfera-M No. 3, one of 20 catalogued objects, reached a 826 × 830 km orbit inclined 98.6°.

How many satellites did Ionosfera-M 3 & 4 launch?

20 payloads from this launch are catalogued, 20 of them still in orbit (Data from J. McDowell, planet4589.org).