Messier 35, also known as NGC 2168 is an open cluster in the constellation of Gemini containing ~200 stars. It lies at a distance of ~2,800 light-years, has a diameter of ~23 light years and is ~110 million years old.In the wide angle images, two additional deep sky objects are visible. To the south-west of M35 is NGC 2158, an open cluster that is ~2 billion years old that lies around 9,000 light-years further away than M35. Further to the west, towards the edge of the wide angle image, lies IC 2157, another open cluster.The first image comprises 10 x Luminance (10 seconds each) and 5 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 75 degrees on 21 February 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 80 degrees on 20 November 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 15 September 2019