Mu family

Mu-4S

RetiredJapan Institute of Space and Astronautical ScienceSpec: S

The Mu, also known as M, was a series of Japanese solid-fuelled carrier rockets, which were launched from Uchinoura between 1966 and 2006. Originally developed by Japan's Institute of Space and Astronautical Science, Mu rockets were later operated by Japan Aerospace Exploration Agency following ISAS becoming part of it.

Flights flown4

Success rate75%3/4

Payload to LEO180kg

Maiden flight1970-09-25

Peak year19712 flights

Mu-4S is built by Institute of Space and Astronautical Science of Japan. It first flew on 25 September 1970 and last flew on 19 August 1972.

Flight record

4 records

75% success rate3 of 4 flown · 1 failed

1970peak 1971 · 2 flights1972

First flight1970-09-25

Latest flight1972-08-19

Failures1

Consecutive successes3

Fastest turnaround143d 23h

Payload

Per mission profile

Low Earth orbit	180kg

Vehicle

S spec

Stages	5
Length	23.6m
Diameter	1.41m
Launch mass	43t
Liftoff thrust	1,932kN
Maiden flight	1970-09-25
Reusable	No

Pads used

1 pad

Mu Center4

Orbits delivered

2 orbits

Low Earth Orbit3Elliptical Orbit1

Launch history

4 launches

Date	Mission	Pad	Orbit	Outcome
1972-08-19	Mu-4S \| Denpa	Mu Center	Elliptical Orbit	Success
1971-09-28	Mu-4S \| Shinsei	Mu Center	Low Earth Orbit	Success
1971-02-16	Mu-4S \| Tansei-1	Mu Center	Low Earth Orbit	Success
1970-09-25	Mu-4S \| MS-F1	Mu Center	Low Earth Orbit	Failure

Specifications from Launch Library 2 by The Space Devs, launch records from Space Index. Derived figures are computed here; see sources and method.