日面局部放大的黑子群

C.L.Chan

日面局部放大的黑子群, Enlarged Sunspot group inSolar Activity Cycle 25, HKT: 2020/11/06, 09h51m Telescope: Astro Physics, Star 12 ED, D=12cm, Stop downto 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, IRblock filter removed, ISO 100, 1/4000 sec exposure. Atmospheric Transparent:8/10, Seeing: 8/10. Equipment borrowed from Mr. Ng. The location in thisobservation is Kennedy Town, Hong Kong 堅尼地城.