The orbital period is 228 days. They are very close (relative to the size of the red giant) which is why the white dwarf is absorbing material from the other s

The orbital period is 228 days. They are very close (relative to the size of the red giant) which is why the white dwarf is absorbing material from the other star. https://en.wikipedia.org/wiki/T_Coronae_Borealis https://en.wikipedia.org/wiki/T_Coronae_Borealis