第25週第一組大雙極群

C.L.Chan

太陽黑子活動週期第25週第一組大雙極群First large Sunspot group in Solar Activity Cycle 25, HKT: 2020/11/06, 09h51m Telescope: 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-11 Equatorial Mount with motor drive. Canon EOS 700D camera, IR block filter removed, ISO 100, 1/4000 sec exposure.  Atmospheric Transparent: 8/10, Seeing: 8/10. Equipment borrowed from Mr. Ng. The location in this observation is Kennedy Town, Hong Kong 堅尼地城.