晨光初照三兄弟

C.L.Chan

晨光初照三兄弟, 左邊三個殞坑由上至下是托勒密(地心論首倡人), 阿方索(十三世天文學家), 阿爾扎赫 (阿拉伯天文學家), 由大至小而被名之. 旭日東升, 盤地還是黑暗 , 陽光只照亮中央小山的山頂. 留意右邊凌亂的山區有多條長長的裂溝.

Three Brother Craters. 2020/04/30 UT: 14h10m, Telescope TECMaksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Losmandy G-11 EquatorialMount with motor drive. Camera QHY 5III 224 Color Cam, Capturewith FireCapture, Shoot at Gamma=100, Gain=40, Expo= 3ms/frame, frame rate 30frames/sec, avi format, stack and process 25% best frames in 1803 frames,­ withSoftware AstroStackert 3 , wavelet with RegiStax V.6 ,  Atmospheric condition : Transparent : 9­/10,Seeing : 7/10. Equipment borrowedfrom Mr. Ng. Photo taken at Kennedy Town堅尼地城, Hong Kong.