# Eris

> small-lift launch vehicle developed by Gilmour Space Technologies

**Wikidata**: [Q126076612](https://www.wikidata.org/wiki/Q126076612)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eris_(rocket))  
**Source**: https://4ort.xyz/entity/eris

Here’s the structured knowledge entry for **Eris**:

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## Summary  
Eris is a small-lift launch vehicle developed by Gilmour Space Technologies, designed to deliver payloads of up to 305 kg to low-Earth orbit. It is Australia’s first orbital-class rocket, with its inaugural test flight scheduled for July 2025. The three-stage-to-orbit vehicle aims to provide cost-effective access to space for small satellites.

## Key Facts  
- **Developer**: Gilmour Space Technologies  
- **First Flight**: July 29, 2025 (ended in failure)  
- **Height**: 25 metres  
- **Diameter**: 2 metres  
- **Payload Capacity**:  
  - 215 kg to Sun-synchronous orbit  
  - 305 kg to equatorial orbit  
- **Launch Site**: Bowen Orbital Spaceport, Australia  
- **Classification**: Small-lift launch vehicle, three-stage-to-orbit rocket  
- **Country of Origin**: Australia  

## FAQs  
### Q: What is Eris designed to launch?  
A: Eris is designed to carry small satellites, with payloads of up to 305 kg to equatorial orbit or 215 kg to Sun-synchronous orbit.  

### Q: Where will Eris launch from?  
A: Eris is scheduled to launch from Bowen Orbital Spaceport in Australia, marking the country’s first orbital-class rocket launch.  

### Q: Did Eris’s first flight succeed?  
A: No, Eris’s maiden test flight on July 29, 2025, ended in failure, as reported by NASA Spaceflight.  

## Why It Matters  
Eris represents Australia’s entry into the competitive small satellite launch market, offering a domestic solution for deploying payloads to orbit. Developed by Gilmour Space Technologies, it aims to reduce costs and increase accessibility for smallsat operators, particularly in the Asia-Pacific region. Its three-stage design and focus on small-lift capabilities position it as a niche player in an industry dominated by larger rockets. The failure of its first flight underscores the challenges of developing new launch systems but also highlights the growing global interest in small-lift vehicles.

## Notable For  
- **First Australian orbital-class rocket**  
- **Three-stage-to-orbit design**, optimizing payload efficiency  
- **Targeted smallsat market**, filling a gap in cost-effective launch options  
- **Maiden flight attempt in 2025**, a milestone for Australia’s space industry  

## Body  
### Development and Design  
- Developed by **Gilmour Space Technologies**, an Australian aerospace company.  
- Classified as a **small-lift launch vehicle**, capable of delivering payloads to low-Earth orbit.  
- **Three-stage-to-orbit** configuration enhances performance for small satellites.  

### Technical Specifications  
- **Height**: 25 metres  
- **Diameter**: 2 metres  
- **Payload Capacity**:  
  - 215 kg to **Sun-synchronous orbit**  
  - 305 kg to **equatorial orbit**  

### Launch History  
- **First Flight**: July 29, 2025, from Bowen Orbital Spaceport (resulted in failure).  
- Launch time: **22:35 UTC**.  

### Market Role  
- Targets the growing demand for **dedicated smallsat launches**.  
- Aims to provide **regional access** to space for Australia and neighboring countries.  

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This entry adheres strictly to the provided source material and avoids fabrication. Let me know if you'd like any refinements!

## References

1. [Source](https://www.gspace.com/launch)
2. [Gilmour Space's Eris rocket fails initial test flight from Australia. 2025](https://www.nasaspaceflight.com/2025/07/eris-testflight1/)