SIMBAD references

T Coronae Borealis is a binary star known as a recurrent nova which has a period of approximately 80 yr whose last two ourtbursts occurred in 1866 and 1946. The American Association Variable Stars Observers in early 2024 launched an observing campaign after a bright state of the star has been observed since 2015, interpreted as a precursor to a new eruption and from the mysterious pre-eruption dip observed since 2023. From 2024 April 2 to November 7, we obtained, through two Seestar S50 smart-telescopes, 8060 unfiltered photometric points. It was thus possible to calculate the orbital period of the binary system found to be 226.1 ± 3.8 days, lower than the officially recognized 227.5687 ± 0.0099 days but within the error bar. No outbursts were observed during this observation period.