Thanks Laurie, Bill and Andrew. I was thinking about stars D and E.
S1MH000460 should be A an B and little star mag 11. To me it seems there are 3 stars in my photo.
S1NG000452 should be C.
And who is D and E ? S1MH000425 (two stars) and S1MH000415 ?
Or D should be S1MH000384 (star at top of image) ? Perhaps S1MH000350 ?
Many texts tell about 5 stars (A,B,C,D and E) but none shows who is who.
The reference most distant is relative. And the description of distance with arcseg wasn't clear to me.