MISSION OVERVIEW
Japanese technological test satellite designed by the Institute of Space and Aeronautical Science, University of Tokyo.
LAUNCH DETAILS
VEHICLE
Mu-4SMISSION
Tansei-1
MISSION TYPE
Test Flight
TARGET ORBIT
Low Earth Orbit
LAUNCH PAD
Mu CenterLAUNCH SITE
Uchinoura Space Center, JapanCOUNTRY
JPN
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 443cb710-b336-4b2b-a8a7-b41d228d5eb4
Reported date: Feb 16, 1971 at 04:00 UTC
Last synced: 14 hours ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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VEHICLE — Mu-4S →
MANUFACTURER
Institute of Space and Astronautical Science
VARIANT
S
FLIGHTS
4
SUCCESSES
3
SUCCESS RATE
75%
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.
FREQUENTLY ASKED QUESTIONS
When is the Mu-4S | Tansei-1 launch?
The Mu-4S | Tansei-1 is scheduled for Tuesday, February 16, 1971 at 4:00 AM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for Tansei-1?
The Mu-4S | Tansei-1 mission uses the Mu-4S rocket, manufactured by Institute of Space and Astronautical Science. The Mu-4S has flown 4 times with a 75% success rate.
Where is the Mu-4S | Tansei-1 launching from?
The launch takes place from Mu Center at Uchinoura Space Center, Japan.
What orbit is Tansei-1 going to?
The Tansei-1 mission is targeting Low Earth Orbit.
Who is launching Tansei-1?
The Mu-4S | Tansei-1 is operated by Institute of Space and Astronautical Science.
Can I watch the Mu-4S | Tansei-1 launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
LAUNCH TIMELINE
Mar 28, 2026 21:44 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 21:44 UTC
Launch date set: Feb 16, 1971 at 04:00 UTC
NET (No Earlier Than) confirmed by Institute of Space and Astronautical Science
Mar 28, 2026 21:44 UTC
Launch completed successfully
Updated via Launch Library 2
LIVE DATA SOURCES
Last data sync: 14 hours ago
●Launch Library 214 hours ago
Launch ID: 443cb710-b336-4b2b-a8a7-b41d228d5eb4
●Open-Meteo Weather14 hours ago
Pad weather at 31.25, 131.08
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