Rupes Alta

C.L.Chan

右上方的平原是酒海, 下方光亮的一條長約 427 公里, 高 1公里的是阿爾泰斷崖.

Rupes Alta (atthe lower), UT 2020 07 28, 20h35m, Telescope TEC Maksutov-Cassegrain MC200/20,D=20cm, F.L.=400cm, Losmandy G-11 Equatorial Mount with motor drive. Camera QHY5III 224 Color Cam, Capture with FireCapture, Shoot at Gamma=100, Gain=40,Expo= 0.25ms/frame, avi format, stack and process 30% best frames in 1803frames by free Software AutoStakkert 3, wavelet with RegiStax V.6, Final touchby Microsoft Photo software. Atmospheric condition: Transparent: 7/10, Seeing :8/10. Equipment borrowed from Mr. Ng. The photo was taken at Kennedy Town 堅尼地城, Hong Kong.