兩個質量中心

C.L.Chan

雙星團, 若一團星雲有兩個質量中心, 它就會形成這樣的雙核心的疏散星團.

Double Clusters.  HKT 2019/11/ 2, 22h07m to 22h20m, Canon 700DCamera, IR filter removed. Soligor 450mm lense f/8, ISO 6400, Astronomik light pollution filter is used. Exposure 45 sec each, RAW format. Use Deep SkyStacker software to stack 14 light frames, 10 Dark frames, 10 Bias frames and 12flat frames. Brightness & contrast adjustment by GIMP, final touch byMicrosoft Photo.Place where the photos taken is Astro Park at Sai Hung, HongKong. 萬宜水庫西壩天文公園