Key statistics
Satellite IONOSFERA-M 04 at a glance.
Uptime
20
Days in orbit
Revolutions
≈ 14.2
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
98.6
Latest
Satellite identification and parameters
Extended collection of information and parameters for IONOSFERA-M 04.
Object identification
Identified? True
Debris? False
Object name: IONOSFERA-M 04
International designator: 2025-155B
Object number (NORAD): 64877
Object ID (CCSDS): 64877
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 101.323 minutes
Inclination: 98.5564 deg
SMA: 7199.464 km
Apoapsis: 822.552 km
Periapsis: 820.107 km
RAAN: 191.2285 deg
Eccentricy: 0.0001698
Argument of periapsis: 62.1672 deg
Mean anomaly: 297.9677 deg
Mean motion: 14.21191154 rev/day
Mean motion (dot): 0.00000073 rev/day2
B* drag term: 0.000052912 1/REarth
Two-line elements (TLE)
Creation date: Aug. 14, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Aug. 13, 2025, 9:05 p.m. UTC
TLE line 0: 0 IONOSFERA-M 04
TLE line 1: 1 64877U 25155B 25225.87864728 .00000073 00000-0 52912-4 0 9999
TLE line 2: 2 64877 98.5564 191.2285 0001698 62.1672 297.9677 14.21191154 2746
Live tracking on map
Real-time ground track for satellite IONOSFERA-M 04.
In-orbit conjunctions
There are no conjunctions computed for IONOSFERA-M 04, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space 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
IONOSFERA-M 04 was lifted into orbit during the mission ‘Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4’, on board a Soyuz 2.1b/Fregat-M space rocket.
The launch took place on July 25, 2025, 5:54 a.m. from Cosmodrome Site 1S.
For more information about the launch, click the button.

Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4
Agency: N/A
Status: Launch Successful
Launch date: July 25, 2025, 5:54 a.m. UTC
Rocket: Soyuz 2.1b/Fregat-M
Launch pad: Cosmodrome Site 1S
Location: Vostochny Cosmodrome, Siberia, Russian Federation
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