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Epsilon (2) (ERG) [JAXA]

Epsilon (2) CLPS (ASNARO 2) [JAXA]

The Epsilon (designated Advanced Solid Rocket during development) is the replacement for the M-5 rocket.

The initial configuration, Epsilon, featured the SRB-A3 Booster of the H-2A as first stage and the M-34c and KM-V2b stages of M-5 heritage as second and third stages. Two SMSJ ( Solid Motor Side Jet) are added to the SRB-A motor for roll control. Optionally, a liquid fueled fourth stage (CLPS, Compact Liquid Propulsion Stage) can be carried. It will be capable to put about 1200 kg into low earth orbit (3 stage) or 450 kg into a sun synchronous orbit (4 stage). The focus in development will be on streamlining the launch procedures and reducing the costs.

Beginning with the second flight, it was replaced by the improved Epsilon (2) (Enhanced Epsilon), which features the larger M-35 stage 2 and a modified stage 3 KM-V2c, which both will have non-extending nozzles to improve performance and to simplify the vehicle.

The new rocket had its maiden flight in 2013.

Version Stage 1 Stage 2 Stage 3 Stage 4
Epsilon SRB-A3 M-34c KM-V2b -
Epsilon CLPS SRB-A3 + 2 × SMSJ M-34c KM-V2b CLPS
Epsilon (2) (Enhanced Epsilon) SRB-A3 + 2 × SMSJ M-35 KM-V2c -
Epsilon (2) imp. CLPS (Enhanced Epsilon imp. CLPS) SRB-A3 + 2 × SMSJ M-35 KM-V2c imp. CLPS
Performance (kg) LEO LPEO SSO GTO GEO MolO IP
Epsilon 1200 - - - - - -
Epsilon CLPS 700 - 450 - - - -
Epsilon (2) (Enhanced Epsilon) 1500 - - - - - -
Epsilon (2) imp. CLPS (Enhanced Epsilon imp. CLPS) - 590 - - - -
No:     Serial: Type:                   Date:         LS         Payload

 1       1      Epsilon CLPS            14.09.2013    Ka LP-M    EXCEED (SPRINT A)
 2       1      Epsilon (2)             20.12.2016    Ka LP-M    ERG (SPRINT B)
 3       1      Epsilon (2) CLPS        17.01.2018    Ka LP-M    ASNARO 2


 4       2      Epsilon (2) CLPS        xx.01.2019    Ka LP-M    RAPIS 1 / ALE 1 / Hodoyoshi 2 / MicroDragon /
                                                                 OrigamiSat 1 / AOBA-VELOX 4 / NEXUS
 x       x      Epsilon (2) CLPS        xx.xx.2018    Ka LP-M    JV-LOTUSat 1
Launch sites:

Ka  = Kagoshima Space Center / Uchinoura Space Center, Kagoshima, Kyushu, Japan Japan