Antares + Messier 4
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Antares is a red giant star located approximately 550 light-years from Earth in the constellation Scorpius. It is one of four stars known as the 'Royal stars of Persia' and is often referred to as 'the heart of the scorpion.' Antares is also the 11th brightest star in the northern hemisphere. http://en.wikipedia.org/wiki/Antares In very close proximity to Antares there are two globular clusters, Messier 4 and NGC 6144.
ABOUT THE IMAGE DATE/TIME: The evening of June 22nd, 2014. CAMERA: Canon XSI, 450Da TELESCOPE: Orion 100mm ED refractor @ F/7.65 ISO SETTING: 800 EXPOSURES: 28 EXPOSURE LENGTH: 300sec. TOTAL EXPOSURE LENGTH: 2hrs, 20min. SUBTRACTIONS: 16 darkframes, 20 flat frames and 16 dark-flat frames. CAPTURE SOFTWARE: MaximDL STACKING SOFTWARE: Deep Sky Stacker PROCESSING: Photoshop CS3 |