太陽黑子 2020/12/01,10h04m

C.L.Chan

今早太陽黑子, Sunspot group in Solar Activity Cycle 25,HKT: 2020/12/01,10h04m Telescope: Astro Physics, Star 12 ED, D=12cm, Stop downto 80mm, F.L.=102cm, Prime Focus, Baddar film solar filter ND5. Losmandy G-11Equatorial Mount with motor drive. Canon EOS 700D camera, IR block filterremoved, ISO 100, 1/500 sec exposure, jpg format. Stacking 10 frames &Wavelet by RegiStax 6, Final touch by Microsoft Photo, Atmospheric Transparent:7/10(Thin Cloud), Seeing: 8/10. Equipment borrowed from Mr. Ng. The location inthis observation is Kennedy Town, Hong Kong 堅尼地城.