Helios
Quickly and affordably move your payload from LEO directly to MEO, GEO, and beyond. Flights starting 2026.
Fly with Helios
Hardware
Meet Helios
Our high-energy kick stage economically delivers large payloads from LEO directly to MEO, GEO, and beyond.
In-house engine development
In-house tank manufacturing
In-house vehicle integration
Services
Access GEO and Beyond
5+ Tons From LEO to GEO in under one day
Gets you to GEO, now. Flexible interfaces allow for payloads of all sizes.
The Most Affordable Way to GEO and Beyond
Paired with a low-cost LEO launch, Helios is the most economical way to reach our inner solar system.
Launcher Agnostic and Ready for the Super-heavy Future
Designed for Falcon 9, Falcon Heavy, Starship, Terran R, New Glenn, Vulcan, MLV, and Ariane 6.
Rideshare Options Starting 2026
Get in touch to learn more about our limited early-adopter program.
Access Other Worlds
Helios is your ride to GEO, the Moon, Mars, and beyond.
End-to-End Customer Service
We help with mission design, launch procurement, acceptance testing, accelerating schedules, export, insurance, launch support, and all on-orbit operations.
Propulsion
A Legacy of Reliability
Meet Helios’ main engine, Deneb. Designed by Tom Mueller, the engineer responsible for the most reliable rocket engine in history.
- Liquid methane / liquid oxygen (Methalox)
- 15,000 lbf (67 kN) thrust
- Staged Combustion Cycle
- Turbopump with single shaft, dual impeller
- Impulse designed and produced valves
- Torch ignition
- Restart capable for multi-burn missions
Specifications
Large mass to high-energy orbits
GEO
4,000 kg
GTO
7,500 kg
MEO – 20,000 km
5,500 kg
TLI (Lunar Transfer)
6,000 kg
Earth Escape (Mars Transfer)
4,500 kg
For additional questions, contact sales@impulsespace.com