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 2014 and 2019 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 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 10 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.

Total number of IAU members:13661 (of which 534 Junior members). Number of Active Individual and Junior Members in the IAU Directory: 11124.


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Name▼ Location NCA adherence
Ubachs, Wim Netherlands Netherlands
Úbeda, Leonardo United States United States
Ubertini, Pietro Italy Italy
UCHIDA, Yutaka, Deceased (1936-) Japan
UCHIDA , Juichi (Inactive) Japan Japan
Udalski, Andrzej Poland Poland
Udal'tsov, Vyacheslav, Deceased (1926-2009) Russian Federation
Udaya, Shankar N. India India
Uddin, Wahab India India
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
UENO, Sueo, Deceased (1913-2011) Japan
UESUGI , Akira, Deceased 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 (Junior Member) Russian Federation Russian Federation
Ulaanbaatar, Tarzad (Inactive) Mongolia Mongolia
Ulfbeck, Ole C. (Inactive) Denmark Denmark
Ulich, Bobby Lee (Inactive) United States United States
Ulla Miguel, Ana Maria Spain Spain
Ulmer, Melville P. United States United States
Ulmschneider, Peter (Inactive) Germany Germany
Ulrich, Bruce T. (Inactive) Germany Germany
Ulrich, Marie-Helene D. Germany Germany
Ulrich, Roger K. United States United States
Ulubay Sıddıki, Ayse Turkey Turkey
Ulvestad, James Scott United States United States
Ulyanov , Oleg Mihajlovich Ukraine Ukraine
Umana, Grazia Italy Italy
Umar, Roslan (Junior Member) Malaysia Malaysia
UMEDA, Hideyuki Japan Japan
UMEMOTO , Tomofumi Japan Japan
UMEMURA , Masayuki Japan Japan
Umlenski, Vasil (Inactive) Bulgaria Bulgaria
Unda-Sanzana, Eduardo Chile Chile
Underhill, Anne, Deceased (1920-) Canada
Underwood, James H. (Inactive) United Kingdom United Kingdom
Unger, Stephen (Inactive) Spain Spain
UNGKU IBRAHIM, UNGKU FERWANI SALWA (Junior Member) Malaysia Malaysia
UNNO, Wasaburo (Inactive) Japan Japan
Unruh, Yvonne C United Kingdom United Kingdom
Unwin, Stephen C. United States United States
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