Jun 30, 2019 Kaʻohe, Mauna Kea, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 56x
A very dark blot against a rich galactic starfield, on one side is the small cluster NGC6520, on the other a notable orange star, about 5' across with no stars visible in the darkest region
Jun 5, 2005 Vekol Ranch, Maricopa Co., AZ (map)
46cm f/4.5 Deep Violet
Fantastic dark nebula set off on west side by a 6.9mag orange star and the cluster NGC6520 on the east, about 5' in across, roughly triangular in shape, darkest along the west side, very!! thick galactic star field
25cm f/5 Astrograph
Diam. 5', several small stars in it, the cluster NGC 6520 close E, CD-27 12302 (7.4 arcmin) on NW edge. For the visual discovery of this object see Astronomische Nachrichten 108, 370, 1884.
― A Photographic Atlas of Selected Regions of the Milky Way, E.E. Barnard, 1927
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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