Eris
Gilmour Space Technologies
Gilmour Space's three-stage hybrid-propulsion launch vehicle — 305 kg to SSO — flying from Bowen, Queensland; first test flight July 2025.
Key figurescomparable across the catalogue
- Payload capacity
- 305 kg
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Stages
- 3
- Propulsion
- Hybrid propulsion system as main engines
- Payload to SSO
- 305 kg at 500 km (Block 1)
- Launch site
- Bowen Orbital Spaceport, Queensland, Australia
- Status
- TestFlight1 flown July 2025 (Australia's first sovereign orbital launch attempt); TestFlight2 targeted for early 2027
- Payload fairing diameter
- 1.5 m
About
Eris is Gilmour Space Technologies’ orbital launch vehicle, designed to carry approximately 305 kg to sun-synchronous orbit at 500 km altitude. The three-stage vehicle uses Gilmour’s hybrid rocket engines (liquid oxidiser with a solid fuel grain) as its main propulsion, a combination that provides the simplicity of solid motors with the throttleability of liquid-fuelled engines.
Gilmour Space is developing Eris for launch from Bowen Orbital Spaceport in Queensland, Australia — Australia’s first privately developed orbital spaceport. The company holds launch licenses from the Australian Space Agency and has conducted extensive static fire testing of its first stage engines at its Helensvale, Queensland test facility. Eris TestFlight1, Australia’s first sovereign orbital launch attempt, flew from Bowen in July 2025; TestFlight2 is targeted for early 2027.
Gilmour Space completed a major fundraising round in 2022, raising AUD $61 million (USD ~$40 million) and attracting investment from Boeing HorizonX. The company targets the growing market for dedicated small satellite launches, competing with global providers by offering Australian launch sovereignty and competitive pricing for SSO-optimized missions in the growing Asia-Pacific space market.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.