About HD 160840
HD 160840 is a rare variable star. It lies about 1,244.9 light-years from Earth, sits in the constellation Sco, shines at apparent magnitude 6.65 and has spectral type M3/M4III.
Its spectrum reads M3/M4III — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.