This star is seen inside the semi circle of the constellation named Coronae Borealis. At normal state a pair of binoculars will show the magnitude 6 star easily. Occasionall due to its exceptionally carbon rich atmosphere and it being very deficient in hydrogen it can dim to a magnitude fainter than the planet Pluto around 14th magnitude. It is beleived that the atmospheric carbon is ejected and hides the central star with a cloak of soot.
J.R.Fletcher. M.T.Obsy. UK.
50 mm lens at F2.8. 25 second staionary camera using TriX 400 B/W film developed in D19 for 4minutes @ 20degsC.