ZTF J1813+4251

It is considered a cataclysmic variable with the white dwarf pulling outer layers of hydrogen from the star onto itself.

It has the shortest orbital period of all hydrogen-rich cataclysmic variable stars known.

It is predicted that the orbital period will reach a minimum of 18 minutes within 75 million years as the system evolves.

[1] It was identified in 2022 by Kevin Burdge of MIT using a computer algorithm that searched over 1,000 images from the Zwicky Transient Facility, identifying stars that had brightness variability periods around one hour.

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An example artistic impression of a cataclysmic variable star binary