Optical effects from imaging system.
There appears to be uniformly spaced red objects surrounding the bright star upper right of center on the frame shown. It must be an optical effect of the imaging system, however, I have never seen a similar occurrence before. I count twelve objects. The bright star lower left of center does not show the same effect. Closer inspection shows the distribution is not perfectly uniform. Is there a structure holding a secondary mirror in the optical path? If so, is it constructed of radial support arms and how many are there?