T Corona Borealis - The Blaze Star

A recurrent nova. It is a binary system of a red giant and a white dwarf.
Usually about mag 10.5, maximum mag 2 in 1866 and mag 3 in 1946.
Spectrum shows M3III class with H and He emission (Reference M3III spectrum in blue).

HAG 24in RC, Lhires III 300gr/mm, SBIG STF-8300M, 600s
2019-06-26 @ 22:24 UT