M13, also known as the Great Hercules Globular Cluster, is one of the most spectacular globular clusters in the northern sky. Located approximately 22,000 light-years from Earth in the constellation Hercules, this magnificent collection of several hundred thousand stars spans roughly 145 light-years across. Its densely packed core contains some of the oldest stars in the Milky Way, with an estimated age of more than 11 billion years. First discovered by Edmond Halley in 1714, M13 has captivated astronomers for centuries with its brilliant, concentrated core and stunning spherical appearance.
Through astrophotography, M13 reveals an extraordinary sea of ancient stars, ranging from bright blue-white giants to golden and reddish stellar populations. The cluster’s immense gravitational attraction holds these stars together in a tightly bound system, offering astronomers a remarkable glimpse into the early history and evolution of our galaxy. Under dark skies, M13 can even be spotted with binoculars as a faint, fuzzy patch, but through a telescope it transforms into a breathtaking jewel of countless individual stars.
Telescope SW300/1500
Mount iOptron CEM70
Camera ZWO ASI 294MM-Pro
Filter Wheel ZWO
ZWO L filter 25x60 sec (gain: 139, offset 21) -10C bin 2x2
ZWO R filter 25x60 sec (gain: 139, offset 21) -10C bin 2x2
ZWO G filter 25x60 sec (gain: 139, offset 21) -10C bin 2x2
ZWO B filter 25x60 sec (gain: 139, offset 21) -10C bin 2x2
Copyright: Alexander Zaitsev