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Epsilon S

Epsilon familyJapan Aerospace Exploration AgencyActive

Next flightEpsilon S | JV-LOTUSat-1NET 2026

The Epsilon S rocket is a Japanese solid-fuel rocket designed to launch scientific satellites. It is a follow-on project to the larger and more expensive M-V rocket which was retired in 2006. The Japan Aerospace Exploration Agency (JAXA) began developing the Epsilon in 2007. The first stage is based on SRB-3, the strap-on solid-rocket booster of H3

Epsilon S vehicle

Specifications

Thrust
2,158 kN
Height
24.4 m
Diameter
2.5 m
Launch mass
91 t
Stages
4
Launch cost
$39M
LEO capacity
1,400 kg
SSO capacity
600 kg

Specifications from Launch Library. Figures the operator has not published are omitted.

Flight record

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Flights

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