Mu-3S-II | Yohkoh

The objective of Solar A or Yohkoh (Japanese for sunbeam) is to study the high-energy radiations from solar flares (hard and soft X-rays and energetic neutrons) as well as quiet structures and pre-flare conditions. The mission is a successor to Hinotori, a previous Japanese spacecraft flown at the previous solar activity maximum in 1981.

Mission Details

  • Launch date: August 30, 1991 at 02:30 AM UTC
  • Launch vehicle: Mu-3S-II
  • Operator: Institute of Space and Astronautical Science
  • Launch site: Uchinoura Space Center, Japan
  • Mission type: Earth Science