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: 12739 (of which 1224 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12373.


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Name Location NCA adherence▼
Oliva, Ernesto Italy Italy
Orlandini, Mauro Italy Italy
Orio, Marina Italy Italy
Origlia, Livia Italy Italy
Orlando, Salvatore Italy Italy
OOTSUBO, Takafumi Japan Japan
OYABU, Shinki Japan Japan
OZEKI , Hiroyuki Japan Japan
OKUMURA , Sachiko Kawabe Japan Japan
OKOSHI, Katsuya Japan Japan
OKA, Tomoharu Japan Japan
OTA, Naomi Japan Japan
Ohashi, Masatake Japan Japan
OKAMOTO, Takashi Japan Japan
OOHARA , Ken-ichi Japan Japan
ONISHI , Toshikazu Japan Japan
OKAMOTO, Takenori Joten Japan Japan
OMUKAI, Kazuyuki Japan Japan
OKAZAKI, Atsuo T. Japan Japan
OHISHI, Masatoshi Japan Japan
OTSUKI, Kaori Japan Japan
OZAKI, Masanobu Japan Japan
OKAMURA, Sadanori Japan Japan
OKAMOTO, Sakurako Japan Japan
OKUMURA , Shin-ichiro Japan Japan
OKUDA , Toru Japan Japan
OUCHI, Masami Japan Japan
OKAZAKI, Akira Japan Japan
OKAMOTO, Isao Japan Japan
OHTANI, Hiroshi Japan Japan
OBA, Takayoshi Japan Japan
OHYAMA, Masamitsu Japan Japan
OGURI, Masamune Japan Japan
OHTSUKI , Keiji Japan Japan
OHTA , Kouji Japan Japan
OHNISHI , Kouji Japan Japan
OSAKI, Yoji Japan Japan
OKUDA, Haruyuki Japan Japan
OGURA , Katsuo Japan Japan
OGAWARA , Yoshiaki Japan Japan
OGAWA , Hideo Japan Japan
OGURI, Shugo Japan Japan
ONAKA , Takashi Japan Japan
Omarova, Gulnara Tukenovna Kazakhstan Kazakhstan
Omarov, Chingis Kazakhstan Kazakhstan
OH, Suyeon Korea, Rep of Korea, Rep of
OH, Heeyoung Korea, Rep of Korea, Rep of
OH, Sang Hoon Korea, Rep of Korea, Rep of
OH, Kyu-Dong Korea, Rep of Korea, Rep of
OH, Kap Soo Korea, Rep of Korea, Rep of
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