永遠以其正面對著地球, 形似港幣2元

C.L.Chan

哥白尼環形山, 直徑96公里,永遠以其正面對著地球, 形似港幣2元.

Crater Copernicus, looks like an HK 2 dollars coin. UT 2021 11 16, 13h45m,Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, Tele Vue 2,5x Barlow lens,Total Focal Length=10 meter, Losmandy G-11 Equatorial Mount with motor drive.Camera QHY 5III 224 Color Cam, Capture with FireCapture, Shoot at Gamma=100,Gain=22, Expo= 4.9 ms/frame, 29 f/s, avi format, stack and process 10% bestframes in 1793 frames by free Software AutoStakkert 3, wavelet with RegiStax V.6,iL=2, L1=30, L2=0.  Final touch byMicrosoft Photo software. Atmospheric condition: Transparent: 8/10, Seeing :9/10. Equipment borrowed from Mr. Ng. The photo was taken at Kennedy Town 堅尼地城,Hong Kong.