Herschel 21 (North Up, East Left)
Herschel 21, also known as NGC 654, is an open cluster in the constellation of Cassiopeia.  It lies at a distance of ~8,200 light-years and is ~15 million years old. This image comprises 15 x Luminance (20 seconds each) and 8 x Red, Green and Blue (30, 30 and 24 seconds each), 0.5m f/2.9 ASA Astrograph with FLI ML3200 camera at an altitude of 55 degrees on 6 October 2018. The fields of view are 34’ x 23’ and 18' x 12', respectively.
Hills Observatory: 1 January 2013 to 19 January 2019
COMETS COMETS
DEEP SKY DEEP SKY