Here is the final stacked and post-processed image of Messier 107 taken by Al Sadeem Astronomy’s resident astronomer Aldrin B. Gabuya last May 21, 2018, using the observatory’s Meade LX850 16-inch SCT mounted on Skywatcher EQ8 pro and SBIG STT-8300MM CCD camera.
Messier 107 (also known as NGC 6171) is class X globular cluster, meaning there is a loose concentration of stars that are distributed openly. It is situated about 20.9 thousand light-years away from Earth in the constellation of Ophiuchus (the serpent bearer). It contains about 100,000 stars which are mostly old, spanning about 79 light years of space, with an estimated total mass of 182,000 solar masses. It is considered one of the oldest star clusters in the universe, which was about 13.95 billion years old; moving towards us at 147km/s.
Charles Messier’s colleague Pierre Méchain discovered the globular cluster on April 1782 and was not included in the original Messier Catalogue until it was added by Helen Sawyer Hogg in 1947, together with elliptical galaxies Messier 105 and 106.
With an apparent magnitude of +8.85, it cannot be seen with the naked eye and quite difficult to see clearly in binoculars, only showing a change in sky contrast. This globular cluster can be found about 2.75 degrees southwest of Zeta Ophiuchi, which is about 16 degrees north of Antares. Small telescopes reveal a tiny, diffuse round shape object with a slightly brighter center. More stars will be resolved using larger telescopes from 6 inches higher, showing the brightest stars at the outer region, and the fainter ones at the cluster’s central region.