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Messier 15 is a globular cluster with an enormous star density in its core, that might result from a black hole. The cluster’s distance is roughly 30600lyrs. The object was discovered by Jean-Dominique Maraldi in 1746 and a few years later added to Messier’s catalogue. The planetary nebula Pease 1 - the first planetary ever discovered within a globular star cluster - can not be seen in this image.
Datum/Date: 17./18./19. 08.2012 / August 17th-19th, 2012 Optik / Scope: 7,5” Maksutov Newtonian Astrograph f/5.3 with 2” 1:10 Crayford focusser Sensor/CCD: Pentax K200D, APS-C DSLR, 10MPixels, unmodified Autoguiding: ALccd5 @ ED 80/600 Apochromat Belichtung/Exposure: 30 x 200sec @ ISO 400, 59x120sec @ ISO200, total integration time= 3h 38min 26sec Software: Deep Sky Stacker, Photoshop CS6
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Juniper Hill Observatory
Köfering, Bavaria 12° 12’ E 48°56’ W 344m N.N.
NGC 7078 (Messier 015)