艾奧的影投在木星上
木衛一, 艾奧的影投在木星上 , 木星視半徑 21.3秒 , (今年5月中旬最大為22.4秒)Io and Jupiter, apparent radius 21.3 sec,2018/04/03 HKT:01h50m, Telescope TECMaksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Prime Focus, Losmandy G-11Equatorial Mount with motor drive. Camera ASI 120MC CMOS Web Cam, frame size512x440, Shoot at 20 frames/sec, stack and process709 in 727 frames with Software RegiStax V.5.Atmospherictransparent :8/10, Seeing : 8/10. Equipmentborrowed from Mr.Ng. Taken at Kennedy Town 堅尼地城, Hong Kong.
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