Dates: Nov. 13, 2017
Frames: 22x15" 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: 1815390
RA center: 268.449 degrees
DEC center: -34.775 degrees
Pixel scale: 0.528 arcsec/pixel
Orientation: 251.824 degrees
Field radius: 0.458 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. 22 frames of 15". Darks, Flats and Bias used.
M7 is a large magnificent naked eye open cluster located in the constellation of Scorpius. It's one of the brightest open clusters and has been known since ancient times. It was first recorded in 130 AD by Greek-Roman astronomer Ptolemy and in recognition of this early observation, M7 is often referred to as the Ptolemy Cluster. Italian astronomer Giovanni Batista Hodierna observed 30 stars sometime before 1654 and Charles Messier adding it to his catalogue in 1764.
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