HD144941 is an evolved early-type metal-poor low-mass star with a hydrogen-poor surface . It is frequently associated with other intermediate helium-rich subdwarfs and extreme helium stars . Previous photometric studies have failed to detect any variability . New observations with the K2 mission show complex but periodic variations with a full amplitude of 4 parts per thousand . It is proposed that these are due to an inhomogeneous surface brightness distribution ( spots ) superimposed on a rotation period of 13.9 \pm 0.2 d. The cause of the surface inhomogeneity is not identified , although an oblique dipolar magnetic field origin is plausible .