Individual and Junior Members

Professional scientists whose research is directly relevant to some branch of astronomy are eligible to apply as Individual Members. Individual Members are, normally, admitted by the Executive Committee on the proposal of a National Member.

Junior scientists who have completed their PhD studies between 2015 and 2020 and who are in the initial phase of the career of a professional researcher in some branch of astronomy or a related field may be admitted to the Union by the Executive Committee as Junior Members, for a period not exceeding 6 years.

Individual and Junior Members listed in the IAU Directory have a valid, public email, and are affiliated to at least one Division. They are labeled as "Active Members". For corrections and updates, please contact Any members remaining Inactive for more than 3 years will be removed from the IAU lists.

Additionally, while only Active Members are listed in the IAU Directory, you may still search for Active, Inactive or Deceased Members in the search field to your right.

For gender statistics click here.

Total number of IAU Individual and Junior members: 12446 (of which 1084 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12117.


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Name Location▼ NCA adherence
Salvati, Marco Italy Italy
Sidoli, Lara Italy Italy
Schipani, Pietro Italy Italy
SHIBATA , Yukio Japan Japan
SHIBATA, Masaru Japan Japan
SAKAI , Junichi Japan Japan
SHIBAHASHI, Hiromoto Japan Japan
SAITO, Masao Japan Japan
SATO, Katsuhiko Japan Japan
SUNADA, Kazuyoshi Japan Japan
SAIO, Hideyuki Japan Japan
SUZUKI, Hideyuki Japan Japan
SUDA, Takuma Japan Japan
SAWAI, Hidetomo Japan Japan
SANO, Hidetoshi Japan Japan
SETO, Naoki Japan Japan
SETA, Masumichi Japan Japan
SAKAMOTO, Tsuyoshi Japan Japan
SEKIGUCHI, Tomohiko Japan Japan
SORAI , Kazuo Japan Japan
SEKIDO, Mamoru Japan Japan
SEKI, Munezo Japan Japan
SHIMIZU, Toshifumi Japan Japan
SOFIA LYKAWKA, Patryk Japan Japan
SUEMATSU, Yoshinori Japan Japan
SOTANI, Hajime Japan Japan
SHIMOJO, Masumi Japan Japan
SHINNAGA, Hiroko Japan Japan
SUMIYOSHI, Kosuke Japan Japan
SHIRASAKI, Yuji Japan Japan
SUGIURA, Keisuke (Junior Member) Japan Japan
SOFUE, Yoshiaki Japan Japan
SUMI, Takahiro Japan Japan
SAWADA-SATOH, Satoko Japan Japan
SUGITANI , Koji Japan Japan
SUGIMOTO, Daiichiro Japan Japan
SEKIGUCHI, Kazuhiro Japan Japan
SAWA, Takeyasu Japan Japan
SAKURAI, Takashi Japan Japan
SATO , Shuji Japan Japan
SATO , Fumio Japan Japan
SATO, Shuichi Japan Japan
SATO, Koichi Japan Japan
SATO, Humitaka Japan Japan
SATO, Bunei Japan Japan
SATO, Isao Japan Japan
SUTO, Yasushi Japan Japan
SHIBAI, Hiroshi Japan Japan
SASAKI , Shin Japan Japan
SHIMONISHI, Takashi Japan Japan
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