Messier 103 (North Up, East Left)
Messier 103, also known as NGC 581, is an open cluster containing ~25 stars in the constellation of Cassiopeia.  It has a diameter of ~15 light-years, lies at a distance of ~8,500 light-years and is ~22 million years old.  The top image comprises 10 x Luminance (15 seconds each) and 8 x Red, Green and Blue (15, 15 and 12 seconds each), 0.5m f/2.9 ASA Astrograph with FLI ML3200 camera at an altitude of 50 degrees on 30 September 2016.  The field of view of the image is 32’ x 21’. The middle and bottom images comprise 6 x Luminance (300 seconds each), 0.101m f/5.4 Tele Vue refractor with FLI ML16200 camera at an altitude of 55 degrees on 28 November 2016.  The field of view of the middle image is 132’ x 132’ (2.2 degrees square).  The bright star is magnitude 2.7 Ruchbah,which lies at a distance of 99 light-years in the constellation of Cassiopeia. The field of view of the bottom image is 42’ x 42’.  
Hills Observatory: 1 January 2013 to 8 October 2018
COMETS COMETS
DEEP SKY DEEP SKY