M13 was first identified by Edmond Halley in 1714 and later catalogued by Charles Messier in 1764 in his esteemed catalogue of non-celestial objects.
M13 (also known as Messier 13 or NGC 6205) is one of the most famous and visually striking globular clusters observable from the northern hemisphere.; It is located in the constellation of Hercules. Under a clear, unpolluted sky it can be seen with the naked eye as a faint, nebulous patch, it is about 25,000 light-years from us.
M13 contains around 300,000 stars and has an impressive age of around 11.65 billion years. The stars within M13 are densely clustered, with the densest concentration at its core.
It spans a diameter of about 145 light-years and occupies a sky about 20 arcminutes across. This is equivalent to two-thirds of the apparent diameter of our full moon.
In 1974, the Arecibo Observatory in Puerto Rico sent a direct radio message to M13, symbolising mankind's ability to send signals into the vastness of space. This "Arecibo Broadcast" was a concise radio message containing details about the Earth, its inhabitants and life in general. Although this message would take 25,000 years to reach M13 and another 25,000 years to elicit any response, its primary purpose was to demonstrate the technological prowess of our species rather than to establish genuine communication with extraterrestrial beings.I captured this image during a night with over 95% moon illumination and achieved a total integration time of 43 minutes.
I used my Sky Watcher Esprit 80 (400mm) from the newly established fixed observatory in my backyard. (here my allsky camera:
https://timopro.ch/allsky/)What are your thoughts on it?
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