(Preliminary list)
| Achkar Joseph | LNE-OP, LTE/Observatoire de Paris | France | In person |
| Angermann Detlef | Technical University of Munich | Germany | Online |
| Archinal Brent A. | U.S. Geological Survey (Emeritus) | U.S.A. | In person |
| Arias E. Felicitas | Observatoire de Paris | France | In person |
| Belda Santiago | University of Alicante. | Spain | Online |
| Bell Steven | HMNAO | U.K. | In person |
| Bizouard Christian | Observatoire de Paris | France | Online |
| Bruzewski Seth | United States Naval Observatory | U.S.A. | In person |
| Byram Sharyl | US Naval Observatory | U.S.A. | Online |
| Cañas Natalia L. | Instituto Geográfico Nacional | Argentina | In person |
| Capitaine Nicole | Observatoire de Paris | France | Online |
| Charlot Patrick | Laboratoire d’astrophysique de Bordeaux | France | to be confirmed |
| Cigan Philip | US Naval Observatory | U.S.A. | Online |
| Collilieux Xavier | IPGP / IGN /ENSG | France | Online |
| Corcoran Kyle | U.S. Naval Observatory | U.S.A. | In person |
| Cramer Claire | US Naval Observatory | U.S.A. | Online |
| Davis Maria | U.S. Naval Observatory | U.S.A. | In person |
| De Cicco Marcelo | INMETRO | Brazil | In person |
| de Witt Aletha | Department of Science, Technology and Innovation | South Africa | Online |
| Defraigne Pascale | Royal Observatory of Belgium | Belgium | In person |
| DiLullo Christopher | U.S. Naval Observatory | U.S.A. | In person |
| Di Sisto Romina | Instituto de Astrofísica de La Plata (CONICET – UNLP)) | Argentina | In person |
| Dimarcq Noël | ARTEMIS (UniCA, OCA, CNRS) | France | In person |
| Duan Pengshuo | Shanghai Astronomical Observatory, CAS | China | In person |
| Durst Steve | ILOA – Hawai’i | U.S.A. | Online |
| Efroimsky Michael | US Naval Observatory | U.S.A. | Online |
| Elrod Meredith | US Naval Observatory | U.S.A. | Online |
| Escapa Alberto | University of León | Spain | In person |
| Eubanks Thomas Marshall | Space Initiatives Inc | U.S.A. | In person |
| Fernández Laura I. | MAGGIA Center-UNLP | Argentina | In person |
| Ferrándiz José M. | Universidad de Alicante | Spain | In person |
| Fienga Agnès | Observatoire de la Côte d’Azur | France | Online |
| Folgueira-López Marta | Complutense University of Madrid | Spain | In person |
| Foster Deatrick | US Naval Observatory | U.S.A. | Online |
| Gomez M.Eugenia | MAGGIA Center-UNLP | Argentina | In person |
| Gordon David | US Naval Observatory | U.S.A. | Online |
| Hennessy Gregory | US Naval Observatory | U.S.A. | Online |
| Hilton James | retired | U.S.A. | In person |
| Hohenkerk Catherine Y. | U.K. | Online | |
| Hosokawa Mizuhiko | NICT | Japan | Online |
| Huang Cheng-Li | Shanghai Astronomical Observatory, CAS | China | In person |
| Huang Yidan | Shanghai Astronomical Observatory, CAS | China | In person |
| Ido Tetsuya | NICT | Japan | Online |
| Jacobs Chris | Jet Propulsion Laboratory | U.S.A. | In person |
| Kaplan George | US Naval Observatory | U.S.A. | Online |
| Karbon Maria | Universidad de Alicante | Spain | In person |
| Klioner Sergei | Lohrmann Observatory, TU Dresden | Germany | In person |
| Kopf Andrew | US Naval Observatory | U.S.A. | Online |
| Krásná Hanna | TU Wien | Austria | Online |
| Kudryavtsev Sergey | Sternberg Astronomical Institute, Lomonosov Moscow State University | Russia | In person |
| Laos Emily | US Naval Observatory | U.S.A. | Online |
| Le Bail Karine | Chalmers University of Technology / Onsala Space Observatory | Sweden | Online |
| Li Yixing | Shanghai Astronomical Observatory, CAS | China | In person |
| Liao Shilong | Shanghai Astronomical Observatory, CAS | China | Online |
| Ligas Marcin | AGH University of Krakow | Poland | Online |
| Liu JiaCheng | Nanjing University | China | In person |
| Lofti Massarweh | TU Delft | Netherlands | Online |
| Luke Dones | Southwest Research Institute | U.S.A. | In person |
| Marco Francisco J. | Universidad Jaume I | Spain | Online |
| Margoti Giuliano | National Observatory | Brazil | In person |
| Mariani Vincenzo | Sapienza University of Rome | Italy | In person |
| McCallum Lucia | University of Tasmania | Australia | Online |
| Meech Karen | Institute for Astronomy, University of Hawaii | U.S.A. | Online |
| Meynadier Frédéric | BIPM | International Organization | In person |
| Miceli Marco | ESA NEO Coordination Centre, Planetary Defense Office | Italy | In person |
| Miculán Romina | Observatorio Naval Buenos Aires | Argentina | In person |
| Mortensen Danielle | JHU/APL | U.S.A. | Online |
| Moursi Ahmed | National Research Institute of Astronomy and Geophysics | Egypt | In person |
| Murison Marc | US Naval Observatory | U.S.A. | Online |
| Murray R. Zachary | University Cote d’Azur | France | In person |
| Nastula Jolanta | Centrum Badań Kosmicznych PAN | Poland | In person |
| Niu Liu | Nanjing University | China | In person |
| Osetrova Angelina | Institute of Applied Astronomy of the Russian Academy of Sciences | Russia | In person |
| Pacheco Ana M. | Observatorio Astronómico Félix Aguilar – UNSJ | Argentina | In person |
| Paganelli Flora | Centre de Recherche Astrophysique de Lyon (CRAL)/CNRS | France | In person |
| Park Ryan S. | NASA Jet Propulsion Laboratory | U.S.A. | In person |
| Pavlov Dmitry | St. Petersburg Electrotechnical University | Russia | In person |
| Petrov Leonid | NASA Goddard Space Flight Center | U.S.A. | To be confirmed |
| Poiani Maisa | Federal University of Uberlândia | Brazil | In person |
| Porcelli Luca | INFN-LNF | Italy | Online |
| Puatua Wendy | US Naval Observatory | U.S.A. | Online |
| Qadir Abdul | University of Turku | Finland | In person |
| Rambaux Nicolas | Sorbonne University – LTE – Observatory of Paris | France | Online |
| Ramos Gomes-Jr Altair | Federal University of Uberlândia | Brazil | In person |
| Sargent Andrew | U.S. Naval Observatory | U.S.A. | In person |
| Schuh Harald | TU Berlin and GFZ Potsdam | Germany | In person |
| Segura Marcelo | Universidad Nacional de San Juan | Argentina | In person |
| Seitz Manuela | DGFI-TUM | Germany | Online |
| Śliwińska Justyna | Centrum Badań Kosmicznych PAN | Poland | In person |
| Spoto Federica | Center for Astrophysics, Harvard and Smithsonian | U.S.A. | In person |
| Steves Bonnie | University of Glasgow | U.K. | In person |
| Stewart Susan G. | United States Naval Observatory | U.S.A. | In person |
| Suarez Torres Edilberto | Universidad Distrital – Bogotá | Colombia | In person |
| Subbotin Maksim | Saint Petersburg Electrotechnical University | Russia | In person |
| Tang Kai | Shanghai Astronomical Observatory, CAS | China | In person |
| Tian Wei | Shanghai Astronomical Observatory, CAS | China | In person |
| Titov Oleg | Geoscience Australia | Australia | In person |
| Urunova Renata | Institute of Applied Astronomy RAS | Russia | In person |
| Valsecchi Giovanni B. | IAPS-INAF | Italy | Online |
| Venditti Flaviane | University of Central Florida | U.S.A. | In person |
| Viswanathan Vishnu | NASA/GSFC/UMBC | U.S.A. | Online |
| Wilmot Antonia J. | HM Nautical Almanac Office | U.K. | In person |
| Wu YuanWei | National Time Service Center, CAS | China | In person |
| XI XiaoJin | National Time Service Center，CAS | China | In person |
| Yang Yongzhang | Yunnan Observatories, CAS | China | Online |
| Yilmaz Nazan | Karadeniz Technical University | Turkey | Online |
| Yin Dongshan | National Time Service Center, CAS | China | In person |
| Yseboodt Marie | Royal Observatory of Belgium | Belgium | In person |