[The Mekon (John Briggs)]

NGC 6380 - a faint globular in Scorpius. Plotted in my 1990 Sky Atlas 2000 as just south of Q Sco. This globular has always been very difficult. I failed to find it in the darkest skies with my 130EDT, asked others at Ilford to check in 10" 12" and 16" without result. Finally it was spotted in a 20" F4 Obsession (Jon Andersons?) All this would have been 20 years ago. Recently I have been searching for it in my 18" SDM. I should be able to see it, remembering the view in the 20" but nothing yet.
My question pertains to its plotting. In my more recent edition sky atlas, instead of NGC 6380, we have SL28 - a dark nebula! What is going on, just where is NGC 6380?