Object: The Hercules globular star cluster (M13)
Site: Pozuelo de Alarcón backyard observatory, images obtained through May and June 2015
Equipment: Vixen VC200L scope at 1800 mm focal length. SBIG STL11000 CCD camera. ASA DDM85 equatorial mount. Baader LRGB filters.
Exposures (unguided): 47 five minutes luminance subexposures, 22 ten minutes red subs, 22 ten minutes green subs, and 18 ten minutes blue subs. Total exposure of 14,25 hours.
Image processing: PixInsight. Final touches in Photoshop.
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