mu cephei's size in celestia seems to be a bit exaggerated . it is 3.870 solar radii rather than 1.420 solar radii , as seen here : https://www.youtube.com/watch?v=rYSG8VQUjjI
this needs to be fixed without an addon . thanks .
Added after 1 minute 13 seconds:
also, what is that last star at the end of the video , "VV canis majoris" ? i cannot find it in celestia even though the creator says it is . and why is it 7.720 solar radii ?