Key statistics
Satellite M-4S R/B at a glance.
Uptime
19529
Days in orbit
Revolutions
≈ 12.9
Per day
Orbit
LEO
Low Earth Orbit
Inclination
32.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for M-4S R/B.
Object identification
Identified? True
Debris? False
Object name: M-4S R/B
International designator: 1971-080B
Object number (NORAD): 5498
Object ID (CCSDS): 5498
Country: JAPAN (JPN)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 111.76 minutes
Inclination: 32.0352 deg
SMA: 7685.712 km
Apoapsis: 1748.969 km
Periapsis: 866.185 km
RAAN: 359.4218 deg
Eccentricy: 0.0574302
Argument of periapsis: 261.9999 deg
Mean anomaly: 91.5074 deg
Mean motion: 12.88476819 rev/day
Mean motion (dot): 0.00000052 rev/day2
B* drag term: 0.000036109 1/REarth
Two-line elements (TLE)
Creation date: March 16, 2025, 10:26 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: March 16, 2025, 8:34 p.m. UTC
TLE line 0: 0 M-4S R/B
TLE line 1: 1 5498U 71080B 25075.85712083 .00000052 00000-0 36109-4 0 9995
TLE line 2: 2 5498 32.0352 359.4218 0574302 261.9999 91.5074 12.88476819518623
Live tracking on map
Real-time ground track for satellite M-4S R/B.
Associated space launch
First Japanese scientific satellite to successfully reach orbit.
M-4S R/B was lifted into orbit during the mission ‘Mu-4S | Shinsei’, on board a Mu-4S space rocket.
The launch took place on Sept. 28, 1971, 4 a.m. from Mu Center.
For more information about the launch, click the button.
Mu-4S | Shinsei
Agency: N/A
Status: Launch Successful
Launch date: Sept. 28, 1971, 4 a.m. UTC
Rocket: Mu-4S
Launch pad: Mu Center
Location: Uchinoura Space Center, Japan
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