Akebono was a satellite launched by Japan's ISAS (Institute of Space and Astronautical Science) to make precise measurements
of the way charged particles behave and are accelerated within the auroral regions of Earth's magnetosphere.
It carried only one non-Japanese instrument: Canada's Suprathermal Ion Mass
Spectrometer. Akebono, which means "dawn," was known before launch
||Feb. 21, 1989
||264 × 8,501 km × 75.1°
|mass (at launch)
AND SPACE PROBES