Failed first attempt to orbit Japan's Shinsei (SS-1 / MS-F2) scientific satellite for solar radio, cosmic-ray, and ionospheric research. Mu-4S from Kagoshima (Uchinoura) failed to place the 66 kg craft in orbit on 25 September 1970; a 1971 reflight succeeded.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 1st
- of 4 Mu-4S flights
- Date and time
- 25 September 1970, 05:00 UTC
- Rocket
- Mu-4S
- Builder
- Nissan
- Launch site
- Mu Center, Uchinoura Space Center, Japan
- Payload
- Astrophysics
- Launches in 1970
- 83rd of 124