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Helios

A high-energy kick stage to rapidly, reliably, and affordably deliver payloads from LEO to MEO, GEO, and beyond Flights starting 2026

Fly with Helios

Helios, the chariot of the gods, is a high energy kick stage designed to rapidly delivery payloads to MEO, GEO cislunar, and beyond. It's our solution for direct insertion into GEO and other high-energy orbits. In combination with mainstream medium and heavy lift launch vehicles, Helios can lift 5+ tons from LEO to GEO in less than a day. Helios can accommodate payloads large and small and offer unique flexibility with dedicated, primary/secondary, and dedicated rideshare launch services. Flights start in 2026.

Helios

Large Mass to High-Energy Orbits

Specification
Serviced Orbits
MEO, GTO, GEO, TLI, Earth Escape
GEO Transfer Duration
< 1 Day
Payload Volume
6.5m tall x 4.5m diameter
Payload Interface
Dedicated: 2624 mm, 1575 mm, or custom Primary: 1575 mm or custom Secondary: 8" 15" 24" or 40"x40" four-point
Delta-V
3 to 9 km/s depending on payload mass
Propulsion
1 x Deneb 67 kN (15,000 lbf) thrust engine
Propellant
Liquid oxygen and liquid methane
Reaction Control System
Main engine gimbal Cold-gas RCS thrusters
Launch Vehicle Compatibility
Falcon 9, Falcon Heavy, Starship, Terran R, New Glenn, Vulcan, MLV, Ariane 6, H3

For additional questions, contact sales@impulsespace.com

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Payload compatibility

Dedicated, Primary, Secondary and Rideshare

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Services

Access GEO and Beyond

5+ Tons From LEO to GEO in Less Than One Day
5+ Tons From LEO to GEO in Less Than One Day
Gets to GEO now, with flexible interfaces to allow for payloads of all sizes
The Most Affordable Way to GEO and Beyond
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
Launcher Agnostic and Ready For the Super-Heavy Future
Designed for Falcon 9, Falcon Heavy, Starship, Terran R, New Glenn, Vulcan, MLV, Ariane 6, and H3
Rideshare Options Starting 2026
Rideshare Options Starting 2026
Get in touch to explore our limited early-adopter program
Access Other Worlds
Access Other Worlds
Helios is your ride to GEO, the Moon, Mars, and beyond
End-to-End Customer Service
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

Deneb

Meet Helios’ main engine, Deneb. Designed by Tom Mueller, the engineer responsible for the most reliable rocket engine in history.

Specification
Thrust
67 kN / 15,000 lbf
Propellant
Liquid oxygen and liquid methane
Cycle
Ox-rich staged combustion
Components
Impulse designed and produced
Restart capable
For multi-burn missions

Deneb is a first-magnitude blue supergiant star in the Cygnus constellation. It's one of the vertices of the asterism known as the Summer Triangle and the "head" of the Northern Cross.

COME ABOARD

GEO Rideshare Program

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