Here the THIRD Roslund OBJECT from hi Catalogue.

Image taken from italian Alpes with a soviet telephoto lens JUPITER 21M (200mm. f5.6) with a "G" filter (500-600nm. bandpass) and a ZWO ASI 183mm operating at -10°C - gain 250
Unguided images of 30sec x 60 frames (30minutes total integration).
Live stacking acquisition.
Sky Bortle 3
No post processing except for the scripts.
The SPIKES are REAL (a cross made of black insulating tape in front of the lens).

www.dark-star.it




THE ROSLUND CATALOGUE  is a collection of 7 open clusters located in a large sky area of ​​about 600 square degrees that embraces regions of the constellation Vulpecula, Sagitta, and Cygnus.They are clusters discovered by spectroscopic surveys on photographic plates with a limiting magnitude of  about 12.5. Due to a modest luminosity, most of the stars that compose them can be observed with instruments with an aperture greater than 4 or 5 inches. Some of them can be identified with large binoculars of 80 or 100 millimeters in diameter but their identification is not always obvious.Published for the first time by the Astronomical Society of the Pacific, in 1960, the catalog of astronomer Curt Roslund, working at the Swedish observatory in Lund, is a "neglected" list of star clusters in the summer Milky Way. Unknown to most amateurs, there is a little consideration in these pages of ours. In the image above the current Observatory of the Swedish city.The images shown were obtained on a serene and clear night in mid-August under the black sky I enjoy at Drole, just above St. Jacques, in the upper Ayas valley (AO). The altitude of 1790 meters and the positioning of the instrumentation, right along the Alta Via of the Valle d'Aosta, has allowed the old Soviet telephoto lens Jupiter 21M (a 200mm focal length closed to f5.6 for the occasion) to clearly capture the small star diamonds that form Roslund objects.These are "unique" objects, i.e. not present, with a different name, in other better-known star catalogues.