2023 January 19 Sun - Solar surface in Ca-K, with AR13184, AR13186, AR13188, AR13190, AR13191, AR13192, AR13193, AR13194, AR13195, AR13196 and possible AR1319a and AR1319b.
Sunspot count: group=11, sunspot=64, R=174
Telescope:
For whole-disc: Sharpstar AL80 II refractor, ED Triplet
focal length : 500 mm f/6.25
Camera : ASI1600MM Pro, cooled to -15.0C
Filters: Lunt Ca-K Module B1200.
approximately north is up, east to the left.
2023 January 19 Sun - Solar surface in Ca-K, with AR13184, AR13186, AR13188, AR13190, AR13191, AR13192, AR13193, AR13194
2023 January 19 Sun - Solar surface in Ca-K, with AR13184, AR13186, AR13188, AR13190, AR13191, AR13192, AR13193, AR13194
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