# Helios: robot model

Canonical ID: `29eaa53c-0c80-4c11-bc35-5adf73c33116`

- **Slug:** helios
- **Form factor:** space
- **Maturity stage:** pilot
- **Lifecycle:** active
- **Deployments registered:** 1

## Specs

- **role:** high-energy kick stage
- **payload:** ~4,000 kg to GEO
- **autonomy:** autonomous multi-burn GTO-to-GEO transfer
- **diameter:** 3.5 m
- **propulsion:** Deneb (67 kN, LOX/methane, staged combustion)

## Deployments

- [helios-ses-geo](/deployments/helios-ses-geo.md) at Geostationary Orbit (GEO) (id: `56da6d35-d859-4af1-ab73-57c9a26ba0e6`)

## Supply chain

_No verified supply relationships on file. Supply-chain coverage is being added across the registry; check back as the seed populates this model's suppliers._

_Suppliers appear when verified with at least two strong sources. Sources are append-only; corrections add new sources rather than rewrite history._

## Common questions

### What is Helios?

High-energy kick stage designed for direct GEO insertion from LEO. 3.5 m diameter. Primary engine: Deneb (67 kN LOX/methane, ox-rich staged combustion, 380+ s Isp). Payload capacity ~4,000 kg. First flight targeted 2026 (Falcon 9, with two Mira vehicles). First commercial customer: SES (multi-launch agreement, first mission 2027).

### Who makes Helios?

Helios is made by Impulse Space, based in Redondo Beach, California, USA, founded in 2021.

### Where is Helios deployed?

1 verified deployment of Helios is on the DEPLOY registry, including at Geostationary Orbit (GEO).

### What is Helios's maturity stage?

Helios is at the pilot stage on the DEPLOY maturity ladder (research, prototype, pilot, commercial, production). Pilot stage means at least one named-customer trial deployment is verified.


## Sources (1)

1. https://www.ses.com/press-release/ses-signs-multi-launch-agreement-helios-transport-services-impulse-space

_API: GET /v1/models/29eaa53c-0c80-4c11-bc35-5adf73c33116 · canonical URL: /models/helios_