In orbitRocket body

M-4S R/B

NORAD: 5498
COSPAR: 1971-080B

OrbitalWiki publishes live orbits for active satellites only. This object is in the full catalogue: who launched it, what it is and its last published orbit are below, but there are no current orbital elements for it here.

Spacecraft

Built by: Nissan Motor Co Ltd
Owner: Institute of Space and Aeronautical Sci
Platform (bus): M-40
Mass at launch: 310 kg(estimate, good to about 20%)
Dry mass: 310 kg(estimate, good to about 20%)
Length: 2.7 m
Diameter: 1.5 m
Span with arrays and booms: 2.7 m
Shape: Sphere + Cone

From GCAT by Jonathan McDowell (CC BY 4.0), record S05498, checked 2026-11-05. About this source

Launch

Launch date: 1971-09-28
Rocket: Mu-4S
Flight: Shinsei
Mission name: MS-F2
Launch site: KASC, M
Launched by: Institute of Space and Aeronautical Sci
Rocket performance: Success
Launch designator: 1971-080

From the GCAT launch log, launch 1971-080, checked 2026-11-05. About this source

Catalogue record

Object type: Rocket body
Owner code: JPN
Launch date: 1971-09-28
Period: 111.8 min
Inclination: 32.03°
Apogee: 1,748 km
Perigee: 867 km
Radar cross-section: 0.8094 m²

From CelesTrak SATCAT, checked 2026-11-05. About this source

Where it came from

Catalogued pieces that came from it: 1

Everything from this launch

Payload1 in total, 1 still in orbit
Rocket body1 in total, 1 still in orbit