2021 February 18 Sun - solar surface in Ca-K, with possible AR12802
An active region appears near (N20W24), with bright flares and filaments. At least 4 sunspots are visible in this bipolar group.
sunspot count: group=1, sunspot=4, R=14
Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor
Camera : ASI174MM
focal length : 500 mm f/6.25
filter: Lunt Ca-K Module B1200
approximately north is up, east to the left
2021 February 18 Sun - solar surface in Ca-K, with possible AR12802
2021 February 18 Sun - solar surface in Ca-K, with possible AR12802
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