About HD 215924
HD 215924 is an epic variable star. It lies about 2,886.3 light-years from Earth, sits in the constellation Lac, shines at apparent magnitude 8.34 and has spectral type M4Iab + B.
Its spectrum reads M4Iab + B — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.