hip-32753

Its story

33 Geminorum is a peculiar variable about 858 light-years away, a blue giant classed as a mercury-manganese star. Instead of mixing uniformly, its atmosphere separates the elements into anomalous layers that produce photometric variations on periods of just a few days. It also belongs to an SB1 spectroscopic binary, in which the hidden companion betrays itself only through the shifting of spectral lines.