Jupiter on June 28

C.L.Chan

木星 .今夜又見大紅斑 , 還有衛星來相伴 , 一號艾奧在身旁 , 遠些就是歐羅巴 .

Jupiter and 2 satellites . From left Europa then Io, apparent radius 20.9 sec, Time taken 2018/06/28 HKT:20h53m, Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Prime Focus, Losmandy G-11 Equatorial Mount with motor drive. Camera ASI 120MC CMOS Web Cam, frame size 800x480, Shoot at Gamma=49, Gain=70, Expo=5ms, 40 frames/sec, stack and process 419 in 2349 frames with Software RegiStax V.5, Lowest quality set at 98%. got 98% Improvement. Atmospheric transparent : 9/10, Seeing : 8/10. Equipment borrowed from Mr.Ng. Taken at Kennedy Town 堅尼地城, Hong Kong.