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HELIOsphere is a New York City area convention started in 2017. The first 3 (2017-2019) were held in Tarrytown, NY, while from 2022 onward it has been held in Piscataway, NJ. The 2020 and 2021 conventions were online-only events, due to the COVID-19 pandemic.

It is sponsored and run by NASF3 (New Amsterdam Science Fiction and Fantasy Fandom, Inc.).


Convention Dates Location GoHs
HELIOsphere 2017 March 10-12, 2017 DoubleTree Hotel, Tarrytown, NY Jacqueline Carey, David Gerrold, Danielle Ackley-McPhail, Charles Gannon, Heidi Hooper
HELIOsphere 2018 March 9-11, 2018 DoubleTree Hotel, Tarrytown, NY Eric Flint, Charles Gannon, Cecilia Tan, Mark Oshiro, Tom Kidd
HELIOsphere 2019 April 5-7, 2019 DoubleTree Hotel, Tarrytown, NY Charlie Jane Anders, Laura Antoniou, Tom Smith
HELIOsphere 2020 April 3-5, 2020 virtual (online) Peter David, Kathleen O'Shea David
HELIOsphere 2021 Beyond the Corona April 9-11, 2021 virtual (online)
HELIOsphere 2022 March 25-27, 2022 Radisson Hotel, Piscataway, NJ Peter David, Kathleen O'Shea David
HELIOsphere 2023 April 28-30, 2023 Holiday Inn, Piscataway, NJ Sharon Lee, Steve Miller, David Mattingly, Charles E. Gannon
HELIOsphere 2024 May 3–5, 2024 Holiday Inn, Piscataway, NJ Neil Clarke, C. S. E. Cooney, Carlos Hernandez, David Gerrold

This is a convention page. Please extend it by adding information about the convention, including dates, GoHs, convention chairman, locale, sponsoring organization, external links to convention pages, awards given, the program, notable events, anecdotes, pictures, scans of publications, pictures of T-shirts, con reports, etc.