里斯塔月谷

C.L.Chan

Crater Rheita (R) & Vallis Rheita (V), 這裡是月面東南的山區,  里斯塔月谷 (長=70km, 深2.7km), UT2020/10/04: 17h46m, Telescope TEC Maksutov-Cassegrain MC200/20,D=20cm, F.L.=400cm, Losmandy G-11 Equatorial Mount with motor drive. Camera QHY5III 224 Color Cam,  Shoot by FireCaptureat Gamma=100, Gain=39, Expo= 0.46ms/frame, frame rate=8 frames/sec, RGB &avi format, stack and process 50% best frames in 1798 frames,­ with SoftwareAstroStackert 3 with DSR, wavelet with RegiStax V.6,  final touch by Microsoft photo. Atmosphericcondition: Transparent: 7­/10, Seeing: 7/10, Equipment borrowed from Mr. Ng.The photo was taken at Kennedy Town堅尼地城, Hong Kong.