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: 12744 (of which 1224 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12379.


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Name▼ Location NCA adherence
U, Vivian United States United States
Ubachs, Wim Netherlands Netherlands
Úbeda, Leonardo United States United States
Ubertini, Pietro Italy Italy
Udalski, Andrzej Poland Poland
Udaya, Shankar N. India India
Uddin, Syed A (Junior Member) United States United States
ud-Doula, Asif United States United States
Udovichenko, Sergei N. Ukraine Ukraine
Udry, Stephane Switzerland Switzerland
UEDA, Akitoshi Japan Japan
UEDA, Haruhiko Japan Japan
UEDA , Yoshihiro Japan Japan
UEMURA , Makoto Japan Japan
UENO, Munetaka Japan Japan
Ueta, Toshiya United States United States
Ugolnikov, Oleg Stanislavovich Russian Federation Russian Federation
UJIHARA, Hideki Japan Japan
UKITA , Nobuharu Japan Japan
Uklein, Roman Ivanovich Russian Federation Russian Federation
Ulla Miguel, Ana Maria Spain Spain
Ulmer, Melville P. United States United States
Ulrich, Marie-Helene D. Germany Germany
Ulrich, Roger K. United States United States
Ulubay, Ayse Turkey Turkey
Ulusoy, Ceren Cyprus Botswana, Republic of
Ulvestad, James Scott United States United States
Ulyanov , Oleg Mihajlovich Ukraine Ukraine
Umana, Grazia Italy Italy
Umar, Roslan Malaysia Malaysia
UMEDA, Hideyuki Japan Japan
UMEMOTO , Tomofumi Japan Japan
UMEMURA , Masayuki Japan Japan
Unda-Sanzana, Eduardo Chile Chile
UNGKU IBRAHIM, UNGKU FERWANI SALWA (Junior Member) Malaysia Malaysia
Unruh, Yvonne C United Kingdom United Kingdom
Unwin, Stephen C. United States United States
Uomoto, Alan United States United States
URAKAWA, Seitaro Japan Japan
Urama, Johnson O. Nigeria Nigeria
URATA, Yuji China, Taipei China, Taipei
Urbaneja, Miguel A. Austria Austria
Urbanik, Marek Poland Poland
Ureche, Vasile Romania Romania
Urov sevi'c, Dejan V. Serbia, Republic of Serbia, Republic of
Urquhart, James Stuart Australia Australia
Urquhart, Sheona A United Kingdom United Kingdom
Urrutia, Tanya C Germany Germany
Urry, Claudia Megan United States United States
Usanin, Vladimir S. Russian Federation Russian Federation
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