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太陽黑子(活動週期第25週)第一組大雙極群Firstlarge Sunspot group in Solar Activity Cycle 25, HKT: 2020/11/07, 10h00mTelescope: Astro Physics, Star 12 ED, D=12cm, Stop down to 2 inches,F.L.=102cm, Prime Focus, Thousand Oaks Glass solar filter ND5. Losmandy G-11Equatorial Mount with motor drive. Canon EOS 700D camera, IR block filterremoved, ISO 100, 1/4000 sec exposure, jpg format. Stacking 27 frames in 40& Wavelet by RegiStax 6, Final touch by Microsoft Photo, AtmosphericTransparent: 8/10, Seeing: 8/10. Equipment borrowed from Mr. Ng. The locationin this observation is Kennedy Town, Hong Kong 堅尼地城.
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發表於 2020-11-7 11:08:03