In orbitRocket body

M-3H R/B

NORAD: 11028
COSPAR: 1978-087B

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): KM
Mass at launch: 284 kg
Dry mass: 49 kg
Length: 0.9 m
Diameter: 0.7 m
Span with arrays and booms: 0.9 m
Shape: Sphere + Cone

From GCAT by Jonathan McDowell (CC BY 4.0), record S11028, checked 2026-11-05. About this source

Launch

Launch date: 1978-09-16
Rocket: Mu-3H
Flight: Jikiken/KM -B
Mission name: EXOS-B
Launch site: KASC, M
Launched by: Institute of Space and Aeronautical Sci
Rocket performance: Success
Launch designator: 1978-087

From the GCAT launch log, launch 1978-087, checked 2026-11-05. About this source

Catalogue record

Object type: Rocket body
Owner code: JPN
Launch date: 1978-09-16
Period: 190.8 min
Inclination: 31.25°
Apogee: 8,958 km
Perigee: 239 km
Radar cross-section: 0.7042 m²

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

Where it came from

Catalogued pieces that came from it: 2

Everything from this launch

Debris1 in total, 1 still in orbit
Payload1 in total, 0 still in orbit
Rocket body1 in total, 1 still in orbit