Messier 6 (North Up, East Left)
Messier 16, also known as NGC 6405 and the "Butterfly Cluster" is an open cluster in the constellation of Scorpius.  It has a diameter of ~6 light-years, and lies at a distance of ~1,300 light-years.  It is ~51 million years old.  The golden-orange colored variable star BM Scorpii (magnitude 6.8-8.7, period 815 days) lies to the east of the cluster. This image comprises 15 x Luminance (6 seconds each) and 5 x Red, Green and Blue (15, 16 and 13 seconds each), 0.5m f/2.9 ASA Astrograph with FLI ML3200 camera at an altitude of 30 degrees on 30 March 2017. The field of view of the image is 32’ x 21’.
Hills Observatory: 1 January 2013 to 10 July 2018