|NGC 6520: Open Star Cluster (Sagittarius) RA: 18h 03.3m / DEC: -27° 53'.0|
Instrument: 10-inch Starfinder
Few constellations can match Sagittarius for its sheer number of deep-sky bounty. This fine open cluster is located near the spout of the teapot asterism, about 2.6 degrees north-northwest of 3.0 magnitude Nash. NGC 6520 is shown in the sketch at left, which was drawn at 82X in my 10-inch Newtonian. Seventeen cluster members are tightly grouped at the center of the rendering. Hundreds of unresolved stars paint the region with a dim, gauzy glow. A smattering of field stars--far fewer than were actually observed--provide context. B86 is just west of the cluster. I did not observe this dark nebula at the time the drawing was made. Perhaps this region deserves another look? NGC 6540 is just beyond the field boundary 38' to the east.
Layout, design & revisions © W. D. Ferris
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Revised: March 8, 2002 [WDF]