月球面中心地區 : 三兄弟

C.L.Chan

月球面中心地區 : 三兄弟 , 左邊由上至下是托勒玫(地心說學者). 阿方索. 阿爾扎赫 . 因它們的直徑由大小因而得名 , 我們是在它們的頭頂看它們 , 固很清楚其四正形貌 . 左邊的平原為雲海的東邊.

Crater Ptolemaeus (154km), Alphonsus (110km)& Alzachel (97km). UT 2021 04 21, 14h25m, Telescope TEC Maksutov-CassegrainMC200/20, D=20cm, F.L.=400cm, Losmandy G-11 Equatorial Mount with motor drive.Camera QHY 5III 224 Color Cam, Capture with FireCapture, Shoot at Gamma=100,Gain=37 Expo= 0.413 ms/frame, avi format, stack and process 40% best frames in1804 frames by free Software AutoStakkert 3, wavelet with RegiStax V.6, Finaltouch by Microsoft Photo software. Atmospheric condition: Transparent: 9/10,Seeing: 8/10. Equipment borrowed from Mr. Ng. The photo was taken at KennedyTown 堅尼地城, HongKong.