Ptolomy's Cluster in Scorpio - by Mike O'Day ( https://500px.com/MikeODay )
Ptolemy's Cluster in Scorpio ( Messier 7, NGC 6475 ).
Visible to the naked eye as a small bright patch in the sky, this open cluster is around 980 light years away with around 80 stars within a area of 25 light years or so.
RA 17h 54m, Dec -34deg 47'.
Skywatcher Quattro 10" f4 Newtonian.
Skywatcher AZ Eq6 GT Mount
Orion auto guider - PHD2.
Baader MPCC Mark 3 Coma Corrector.
Nikon D300 (unmodified).
Field of view (deg) ~ 1.35 x 0.90.
18 x 30 sec ISO800.
23 May 14
Reprocessed Pixinsight 8 Sep 2015