Messier 6 (North Up, East Left)
Messier 6, 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. The first 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’ The second and third images comprise 6 x Luminance (300 seconds each), 0.101m f/5.4 Tele Vue refractor with FLI ML16200 camera at an altitude of 30 degrees on 21 July 2017. The fields of view of the images are 132’ x 132’ (2.2 degrees square) and 42' x 42', respectively.
Hills Observatory: 1 January 2013 to 26 May 2020