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NAOJ News 2016,3 Special Poster
(PDF,21MB,3.6MB)
A spotless month (2009)
The biggest sunspot in solar cycle 24 (2014)
Sunspot relative numbers since 1918
Sunspot butterfly diagram
Solar flare in Hα
(Aug. 4 2011)
A plane transit the Sun (Feb. 28 2015)
The ISS transit across the Sun (Nov. 3 2015)
Useful Links
Katsuo Tanaka: 1943 - 1990
Obituary (E.Hiei and T.Sakurai, Solar Physics
Obituary (H.Zirin and T.Sakurai, Lecture Notes in Physics)
Memories of Katsuo (H.Zirin, The Astronomical Herald)
List of Papers
Last Updated: 2024 May 27
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