A sun dog (a parhelion) is so named because the colourful spot of light follows its master, the Sun, around the sky. Well, it follows the Sun if the cloud, in which the sun dog forms, persists. In this case, the drifting cirrus was in the proper position for maybe five minutes and then the show was over. These brightly coloured spots of light are explained by the minimum angle of deviation of sunlight refracted through the 60° prism faces of hexagonal ice crystals.
Exquisite; to see it and to know it this way. – It is an older posting, but I’m going back and filling
a scribbler with these so I can refer to the book when outside and observing. To learn will enhance
the seeing. Your postings are so valuable.