Do you mean B96 instead of B92, Mark?
(B86 is the dark ink spot right next to open cluster 6520).
The faint globular 6540, is about 40 minutes east of B86 and was one
of the last objects I finished up on the H400 list at Fiddletown in
June. Rich area!!
--David Kingsley
>Quote from Steve's earlier post in April:
>I always love revisiting the rich open cluster NGC 6520 in
>Sagittarius and perhaps the best dark nebulae in the sky on the west
>side - Barnard
>86, which earns the moniker the "Inkspot Nebula".
>
>Much less known, though, are two globulars within the same low power
>field. NGC 6540 is situated 40' east of NGC 6520 nearly midway along
>a short 1.5' arc of a half dozen or so mag 13-14 stars which are
>concave to the north. The globular, itself, is just a faint, round,
>40" glow
>embedded just inside the center of this string. which. At 100x, the
>string extends beyond the globular to the west and east and creates
>the
>impression that the globular is quite elongated.
>
>Although this globular was first discovered by William Herschel on
>May 24 1784, and catalogued as an open cluster, it wasn't officially
>listed as a
>globular until two centuries later (as Djorgovski 3 in 1994).
>
>A more recent discovery is ESO 456-SC38, found photographically on
>the European Southern Observatory Sky Survey and initially catalogued
>as an open cluster. It was reclassified as a globular by Djorgovski
>in 1987 (color-magnitude plot) and is situated 3' north of a mag 9
>star - just 21'
>WNW of NGC 6520/B86!
>
>At 140x I picked up a faint, oval glow ~1.5'x1.1' with no hint of
>resolution other than one or two faint star glimpsed at the edges.
>The rich milky
>way background is quite prominent in the field except in the
>vicinity of the globular which appears to be nestled in a darker
>"hole". At
>220-280x, ESO 456-SC38 appeared elongated SW-NE and stood out well
>with averted vision with a fairly sharp outline. Interestingly, it
>seemed
>more like a faint patch of nebulosity than a globular. A few mag 15+
>field stars were visible at the edges - the easiest at the SW end
>and a second
>star at the NE edge. One of two additional threshold stars
>intermittently glimmered. This globular is sandwiched between a
>trapezium, consisting
>of a mag 9 star to the south, a close double star 2.5' SSW with two
>mag 10 stars bracketing the cluster on the west and east sides.