Eclipse (rocket)
| Function | Reusable medium-lift launcher |
|---|---|
| Manufacturer | Firefly Aerospace Northrop Grumman |
| Country of origin | United States |
| Size | |
| Height | ~58.5 m (192 ft) |
| Diameter | 4.32 m (14.2 ft) |
| Stages | 2 |
| Capacity | |
| Payload to LEO | |
| Mass | 16,300 kg (35,900 lb) |
| Payload to GTO | |
| Mass | 3,200 kg (7,100 lb) |
| Payload to TLI | |
| Mass | 2,300 kg (5,100 lb) |
| Launch history | |
| Status | Planned |
| Launch sites | Cape Canaveral, SLC-20 Vandenberg, SLC-2W MARS, LP-0A |
| Total launches | 0 |
| First flight | NET 2026 |
| First stage | |
| Powered by | 7 × Miranda |
| Maximum thrust | 7,161 kN (1,610,000 lbf) |
| Specific impulse | 305 s (2.99 km/s) |
| Propellant | RP-1 / LOX |
| Second stage | |
| Powered by | 1 × Vira |
| Maximum thrust | 890 kN (200,000 lbf) |
| Specific impulse | 328 s (3.22 km/s) |
| Propellant | RP-1 / LOX |
Eclipse, previously known as Firefly Beta and the Medium Launch Vehicle (MLV), is a two-stage, partially reusable medium-lift launch vehicle being jointly developed by Firefly Aerospace and Northrop Grumman. Formally announced in 2022, the rocket is designed to be a successor to Northrop Grumman's Antares launch vehicle, able to be partially reused and can launch 16,300 kg (35,900 lb) into low Earth orbit. Currently, the maiden launch of Eclipse is slated for the second half of 2026.