The red supergiant T Perseus is located in the Per OB1 association. The CHARA image reveals a hotspot on the surface of the red supergiant T Per.
Reference:
CHARA/MIRC Observations of Two M Supergiants in Perseus OB1: Temperature, Bayesian Modeling, and Compressed Sensing Imaging (pdf)
Baron, F., et al., 2014, Astrophysical Journal, 785, 46