Dates: Nov. 13, 2017
Frames: 25x15" ISO1600 30C
Integration: 0.1 hours
Avg. Moon age: 24.81 days
Avg. Moon phase: 23.15%
Bortle Dark-Sky Scale: 6.00
Astrometry.net job: 1815412
RA center: 294.962 degrees
DEC center: -30.947 degrees
Pixel scale: 0.525 arcsec/pixel
Orientation: 250.579 degrees
Field radius: 0.431 degrees
Locations: Home , SAO PAULO, Brazil
Image captured with a Skywatcher Mak180 using a Celestron 6,3 Reducer/Corrector. Image camera was a Canon T3i mod. No filters used. 2" camera to telescope adapter. 25 frames of 15”. Darks, Bias and Flats used.
Located some 17,300 light years from planet Earth and spanning nearly 100 light years in diameter, this loose appearing ball of stellar points may not seem concentrated – but its home to tens of thousands stars.
Messier 55 (também conhecido como NGC 6809 ou M55) é um aglomerado globular localizado na constelação de Sagittarius a 17 300 anos-luz da Terra. Foi descoberto por Nicolas Louis de Lacaille em 1752. Possui um raio de 50 anos-luz e uma dimensão aparente de 19 minutos de arco.
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