About HD 166612
HD 166612 is a rare variable star. It lies about 1,152.5 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 7.37 and has spectral type A2/3V +A9/F0.
Its spectrum reads A2/3V +A9/F0 — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.