Science
IONOSFERA-M 4
Ionospheric Science · Roscosmos
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The fourth Ionosfera-M completes Russia's basic operational ionospheric monitoring constellation. Four satellites at complementary inclinations can map the global ionosphere continuously — providing Russia the space weather infrastructure equivalent to what NOAA's Space Weather Prediction Center provides to the US and its allies.
Its orbit
- Orbit
- Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
- Altitude
- 512–513 mi (823–826 km)
- Inclination
- 98.6°
- One orbit
- 101.2 minutes14.2 orbits a day
- NORAD ID
- 64877
- Int’l designator
- 2025-155B
- Launched
- 2025
Orbital elements from CelesTrak, as of 7 Nov 2026.