JAXA/ISAS's AKEBONO (EXOS-D) was an auroral and magnetospheric observation mission launched on 1989-02-22 by Mu-3S-II-4. It studied auroral particle acceleration, the magnetosphere, plasmasphere, and radiation-belt dynamics through long-term observations that continued until operations ended on 2015-04-23.
Alerts are unavailable because this mission is no longer active.