Herschel 351 is a planetary nebula in the constellation of Gemini. It has two NGC references,NGC2371 is the west-southwestern part and NGC2372 is the east-northeastern part. It lies at a distance of ~3,900 light-years and is ~10,000 years old. Its central star is magnitude 14.9.This image comprises 10 x Luminance (60 seconds each) and 5 x Red, Green and Blue (60, 60 and 48 seconds each), 0.5m f/2.9 ASA Astrograph with FLI ML3200 camera at an altitude of 85 degrees on 18 March 2017.The fields of view of the images at the top and bottom are 32’ x 21’ and 18’ x 12’ respectively.
Hills Observatory: 1 January 2013 to 19 January 2019