Science
MONITOR-4 (RS57S)
Russian University CubeSat (2023-091 Rideshare Cluster) · Russian University Consortium / Sputnix
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Monitor-4 (RS57S), part of a roughly 40-satellite cluster of Russian university and amateur radio CubeSats launched together on June 27, 2023 aboard the same Soyuz rocket carrying the Meteor-M2-3 weather satellite. This satellite is carrying an amateur radio digipeater that hams across Russia and beyond can use to relay messages — part of a long Russian tradition of pairing university satellite projects with the ham radio community.
Its orbit
- Orbit
- Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
- Altitude
- 294–304 mi (472–490 km)
- Inclination
- 97.5°
- One orbit
- 94.1 minutes15.3 orbits a day
- NORAD ID
- 57182
- Int’l designator
- 2023-091S
- Launched
- 2023
Orbital elements from CelesTrak, as of 22 Sep 2026.