木星的大紅斑 , 兩顆衛星及其一的投影

C.L.Chan

木星的大紅斑 , 兩顆衛星及其一的投影
The Jupiter, Great Red Spot, two satellites and its shadow, 2015/04/17 HKT: 21h38m,
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, Shoot at 20 frames/sec, Atmospheric Transparent :6/10, Seeing : 6/10. Stack and process 571 frames with Software RegiStax V.4 . Photoshop Gaussian Blur 1.0. Equipment borrowed from H.C.Ng. Taken at Kennedy Town, Hong Kong.