Individual Members

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

Individual 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

Total number of IAU members:11353. Number of Individual Members in the IAU Directory: 9188

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Name Location NCA adherence
Ojha, Roopesh United States United States
Oka, Takeshi United States United States
OKA, Tomoharu Japan Japan
OKAMOTO, Isao 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
Okpala, Kingsley C. Nigeria Nigeria
OKUDA, Haruyuki Japan Japan
OKUDA , Toru Japan Japan
OKUMURA , Sachiko Kawabe Japan Japan
OKUMURA , Shin-ichiro Japan Japan
Oláh, Katalin Hungary Hungary
Olano, Carlos A. Argentina Argentina
Olberg, Michael Sweden Sweden
Oliva, Ernesto Italy Italy
Olive, Don H. United States United States
Oliveira, Alexandre S. Brazil Brazil
Oliveira, Joana M. United Kingdom United Kingdom
Oliver, Ramón Spain Spain
Oliver, Sebastian J. United Kingdom United Kingdom
Olivier, Enrico Adrian South Africa South Africa
Olling, Robert P. United States United States
Olmi, Luca Italy Italy
Olofsson, Goeran S. Sweden Sweden
Olofsson, Hans Sweden Sweden
Olofsson, Kjell Sweden Sweden
Olowin, Ronald Paul United States United States
Olsen, Erik H. Denmark Denmark
Olsen, Hans Jørn Fogh Denmark Denmark
Olson, Edward C. United States United States
Olthof, Henk Netherlands Netherlands
Oluseyi, Hakeem M United States United States
Omizzolo, Alessandro Vatican City State Vatican City State
Omont, Alain France France
OMUKAI, Kazuyuki Japan Japan
ONAKA , Takashi Japan Japan
Önel, Hakan Germany Germany
Onello, Joseph S. United States United States
ONISHI , Toshikazu Japan Japan
Onken, Christopher Alan Australia Australia
OOHARA , Ken-ichi Japan Japan
Oosterloo, Thomas Anne Netherlands Netherlands
Oozeer, Nadeem optional South Africa South Africa
Opara, Fidelix Ekeoma Nigeria Nigeria
Oprescu, Gabriela Romania Romania
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