初五新月的北尖角

C.L.Chan

初五新月的北尖角, 最下一個是擎天神隕坑, 右上角見洪堡海, Northern Coner of age 5 new Moon. UT: 2020/11/19, 10h42m, Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, LosmandyG-11 Equatorial Mount with motor drive. Camera QHY 5III 224 Color Cam,  Shoot by FireCapture at Gamma=100, Gain=45, Expo= 0.4ms/frame, frame rate=20 frames/sec, RGB & avi format, stack and process 50% best frames in 1803 frames,­ with Software AstroStackert 3 withDSR, wavelet with RegiStax V.6,  final touch by GIMP & Microsoft photo. Atmospheric condition: Transparent: 8­/10, Seeing: 8/10, Equipment borrowed from Mr. Ng. The photo was taken at KennedyTown堅尼地城, Hong Kong.