HARDWARE / PRODUCTAdded 16 Jul 2026

TRITON_4500 Launch Vehicle

Interorbital Systems
TRITON_4500 Launch Vehicle

Medium-lift two-stage orbital launch vehicle delivering up to 4,500 kg to 500-km polar orbit at $12M per dedicated launch.

Key figurescomparable across the catalogue

Payload capacity
4,500 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

Vehicle class
Medium-lift orbital
Stages
2
Payload to 500 km polar orbit
4,500 kg
Dedicated launch price
$12,000,000
Price per kg to orbit
$2,667/kg
Primary orbit
500 km polar circular
Propellant
WFNA + turpentine
Feed system
Pressure-fed
Engine type
Ablatively-cooled filament-wound composite
Launch platform
Land or ocean platform

About

The TRITON_4500 is Interorbital Systems medium-lift orbital launch vehicle, scaling the NEPTUNE platform to significantly larger payloads via clustered Common Propulsion Modules. It uses WFNA and turpentine propellants with ablatively-cooled filament-wound composite engines, all storable and pressure-fed for simple ground operations.

The TRITON_4500 delivers up to 4,500 kg to a 500-km polar circular orbit and can accommodate larger payloads to near-equatorial orbits. It launches from both land and ocean platforms. At $12 million per dedicated launch ($2,667/kg), it targets medium small satellite constellation and government missions. A TRITON HEAVY cluster variant is also in development.

Documentation

No public datasheet yet — request the datasheet / ICD from the supplier.

Source: www.interorbital.com ↗

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