Landmark of Mars changes

C.L.Chan

Landmark ofMars changes in one hour,UT 2020/10/04: 15h22 &16h23mm, 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=31, Expo= 1ms/frame, frame rate=98 frames/sec, RGB & aviformat, stack and process 50% best frames,­ with Software AstroStackert 3 withDSR, 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.