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: 12742 (of which 1224 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12377.


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Name▼ Location NCA adherence
OHTANI, Hiroshi Japan Japan
OHTSUKI , Keiji Japan Japan
OHYAMA, Masamitsu Japan Japan
Oikonomou, Foteini Norway Norway
Oja, Heikki Finland Finland
Oja, Tarmo Sweden Sweden
Ojha, Devendra Kumar India India
Ojha, Roopesh United States United States
Oka, Takeshi United States United States
OKA, Tomoharu Japan Japan
OKAMOTO, Isao Japan Japan
OKAMOTO, Sakurako Japan Japan
OKAMOTO, Takashi Japan Japan
OKAMOTO, Takenori Joten Japan Japan
OKAMURA, Sadanori Japan Japan
OKAZAKI, Akira Japan Japan
OKAZAKI, Atsuo T. Japan Japan
Okeke, Francisca N. Nigeria Nigeria
Okeke, Pius N. Nigeria Nigeria
Oklopcic, Antonija (Junior Member) Netherlands Netherlands
OKOSHI, Katsuya Japan Japan
Okpala, Kingsley C. Nigeria Nigeria
Oksala, Mary Elizabeth United States United States
OKUDA, Haruyuki Japan Japan
OKUDA , Toru Japan Japan
OKUMURA , Sachiko Kawabe Japan Japan
OKUMURA , Shin-ichiro Japan Japan
Olah, Katalin Ilona Hungary Hungary
Olano, Carlos A. Argentina Argentina
Olberg, Michael Sweden Sweden
Oldengott, Isabel Mira (Junior Member) Germany Germany
Olech, Mateusz (Junior Member) Poland Poland
Olenick, Richard P United States United States
Olguín, Lorenzo Mexico Mexico
Oliva, Ernesto Italy Italy
Olivares Estay, Felipe United States United States
Olivares Sanchez, Hector Raul (Junior Member) Netherlands Netherlands
Olive, Don H. United States United States
Oliveira, Alexandre S. Brazil Brazil
Oliveira, Cristina M United States United States
Oliveira, Joana M. United Kingdom United Kingdom
Oliver, Ramón Spain Spain
Oliver, Sebastian J. United Kingdom United Kingdom
Oliversen, Nancy A. United States United States
Olivier, Enrico Adrian United Kingdom South Africa
Olling, Robert P. United States United States
Olmi, Luca Italy Italy
Olofsson, Goeran S. Sweden Sweden
Olofsson, Hans Sweden Sweden
Olofsson, Henrik A.O. Sweden Sweden
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