Rupes Altai阿爾泰峭壁

C.L.Chan

RupesAltai阿爾泰峭壁(下), L=427km, H=1000m ,在酒海(上)西南方有一度峭壁更巨大 , 比大帽山還要高, 估計它是酒海的第二環壁multiple rings, UT: 2020/11/22, 10h17m, Telescope TECMaksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Losmandy G-11 EquatorialMount with motor drive. Camera QHY 5III 224 Color Cam,  Shoot by FireCapture at Gamma=100, Gain=41,Expo= 0.4ms/frame, frame rate=20 frames/sec, RGB & avi format, stack andprocess 30% best frames in 1803 frames,­ with Software AstroStackert 3 withDSR, wavelet with RegiStax V.6,  finaltouch by GIMP & Microsoft photo. Atmospheric condition: Transparent: 9­/10,Seeing: 9/10, Equipment borrowed from Mr. Ng. The photo was taken at KennedyTown堅尼地城, Hong Kong.