Call for Worldwide Joint Observations:
The 50th Anniversary of the Wow! Signal

Background

August 15, 2027, marks the 50th anniversary of the detection of the Wow! Signal. Despite subsequent follow-up observations and discussions, its source remains unknown.

If a similar signal is detected a second time, it could provide critical clues about its periodicity. Furthermore, observational technology has advanced significantly over the past 50 years, making it possible to obtain far more detailed information about the properties of the signal than was possible back then.

Even if the observations reveal that the signal was emitted by an unknown natural phenomenon, or a chance coincidence of several known phenomena, it would still be a valuable discovery for humankind.

Therefore, we are calling for worldwide joint observations of the Wow! Signal source region.

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Facilities That Have Expressed Interest or Are Under Consideration

• Bustling Universe Radio Survey Telescope in Taiwan
• University of Manchester
• LOFAR
• Breakthrough Listen
• MeerKAT (SKA)
• Misato Observatory

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Period & Frequency

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Coordinates (J2000) (Mendez et al. 2025)

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Data

Each participating observatory is responsible for analyzing its own acquired data. Publication of the results is also at the discretion of each observatory.

If any candidate signals of extraterrestrial intelligent origin are detected, we recommend following the "IAA Declaration of Principles Concerning the Conduct of the Search for Extraterrestrial Intelligence".

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Organizer

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Key Literature on the Wow! Signal

• Perez et al. 2022, Research Notes of the AAS 6, 167
• Caballero 2022, IJAsB 21, 129
• Benford 2021, JBIS 74, 196
• Harp et al. 2020, AJ 160, 162
• Gray & Ellingsen 2002, ApJ 578, 967
• Gray & Marvel 2001, ApJ 546, 1171
• Gray 1994, Icar 112, 485