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在月球南部山區有個著名的環形坑克拉維, 它不單只大( 231km), 更因為它有5個由大至小的環形坑在它的坑內呈弧形排列, 非常美觀. Crater Calvius, UT 2021 04 21,14h34m, Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm,Losmandy G-11 Equatorial Mount with motor drive. Camera QHY 5III 224 Color Cam,Capture with FireCapture, Shoot at Gamma=100, Gain=37 Expo= 0.413 ms/frame, aviformat, stack and process 50% best frames in 1804 frames by free SoftwareAutoStakkert 3, wavelet with RegiStax V.6, Final touch by Microsoft Photo software.Atmospheric condition: Transparent: 9/10, Seeing: 8/10. Equipment borrowed fromMr. Ng. The photo was taken at Kennedy Town 堅尼地城, Hong Kong.
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發表於 2021-4-26 09:36:58