Mira
Impulse Space
Mira is Impulse Space's flight-proven orbital transfer vehicle that provides precise, on-demand payload hosting and last-mile delivery across LEO, MEO, GEO, and cislunar space.
Technical specifications
- Propulsion type
- Non-toxic bipropellant (nitrous oxide/ethane), 8x Saiph thrusters in 4 pairs
- Thrust
- 27 N per thruster, ~216 N total (upgraded 2025 design)
- Specific impulse
- 290 s
- Delta-v
- ~550 m/s with 300 kg payload up to ~900 m/s with 100 kg payload
- Payload capacity
- Up to 300 kg
- Payload volume
- >1 m3
- Pointing accuracy
- <10 arcseconds (1-sigma)
- Attitude control
- 4 reaction wheels + 20 cold-gas RCS thrusters
- Mission lifetime
- Up to 5 years, including GEO
- Operational orbits
- LEO, MEO, GEO, cislunar, and beyond
- Flight heritage
- 3 missions flown: LEO Express-1 (Nov 2023, first flight, 150 km orbit raise in 75 seconds), LEO Express-2 (Jan 2025), and a third mission (2025)
About
Mira is an in-space orbital transfer vehicle developed by Impulse Space, designed as a highly maneuverable last-mile delivery platform rather than a launch vehicle. It uses a non-toxic, storable bipropellant propulsion system (nitrous oxide and ethane) fed by eight Saiph thrusters operating in four pairs, supplemented by 20 cold-gas RCS thrusters and 4 reaction wheels for fine attitude control. Mira can carry payloads up to 300 kg with delta-v ranging from about 550-900 m/s depending on payload mass, and offers a payload volume greater than 1 cubic meter, pointing accuracy under 10 arcseconds, and an operational lifetime of up to 5 years including in GEO. It targets national security, government, and commercial customers needing rapid, flexible deployment and orbit-raising services beyond what a rocket’s upper stage alone provides. Mira first flew on the LEO Express-1 mission in November 2023, demonstrating a 150 km orbit raise in roughly 75 seconds; it flew again on LEO Express-2 in January 2025 with enhanced technology, and has since completed a third mission. In 2025 Impulse Space announced an upgraded Mira design with ~20% more thrust and ~25% more delta-v.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.