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: 12743 (of which 1224 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12378.


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Name Location▼ NCA adherence
OH, Kyu-Dong Korea, Rep of Korea, Rep of
OH, Suyeon Korea, Rep of Korea, Rep of
OH, Sang Hoon Korea, Rep of Korea, Rep of
Othman, Mazlan Malaysia Malaysia
Ortega-Minakata, René A. (Junior Member) Mexico Mexico
Olguín, Lorenzo Mexico Mexico
Obregón Díaz, Octavio José Mexico Mexico
Orru, Emanuela Netherlands Netherlands
Oosterloo, Thomas Anne Netherlands Netherlands
Olthof, Henk Netherlands Netherlands
Offringa, André René Netherlands Netherlands
Ormel, Chris W Netherlands Netherlands
Oklopcic, Antonija (Junior Member) Netherlands Netherlands
Oh, Junghwan (Junior Member) Netherlands Netherlands
Olivares Sanchez, Hector Raul (Junior Member) Netherlands Netherlands
Overzier, Roderik A. Netherlands Netherlands
Okpala, Kingsley C. Nigeria Nigeria
Okeke, Francisca N. Nigeria Nigeria
Okeke, Pius N. Nigeria Nigeria
Oikonomou, Foteini Norway Norway
Østensen, Roy H. Norway Norway
Ortiz-Carbonell, Ada Norway Norway
Ogłoza, Waldemar Poland Poland
Olech, Mateusz (Junior Member) Poland Poland
Ostrowski, Michał Poland Poland
Otulakowska-Hypka, Magdalena (Junior Member) Poland Poland
Oszkiewicz, Dagmara Anna Poland Poland
Orleanski, Piotr Poland Poland
Osório, José Pereira Portugal Portugal
Osório, Isabel Maria T.V.P. Portugal Portugal
Osipova, Aleksandra Anatolyevna (Junior Member) Russian Federation Russian Federation
Obridko, Vladimir N. Russian Federation Russian Federation
Onic, Dusan Serbia, Republic of Serbia, Republic of
Oozeer, Nadeem optional South Africa South Africa
Ortiz Gil, Amelia Spain Spain
Ospina, Nataly (Junior Member) Spain Spain
Oliver, Ramón Spain Spain
Osorio, Mayra Spain Spain
O'Mullane, William Joseph Spain Spain
Oscoz, Alejandro Spain Spain
Ortiz, Jose L. Spain Spain
Olofsson, Goeran S. Sweden Sweden
Olofsson, Hans Sweden Sweden
Oja, Tarmo Sweden Sweden
Östlin, Göran T. Sweden Sweden
O'Connor, Evan P Sweden Sweden
Olofsson, Kjell Sweden Sweden
Olofsson, Henrik A.O. Sweden Sweden
Olberg, Michael Sweden Sweden
Oesch, Pascal A Switzerland Switzerland
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