2023 January 22 Sun - Solar surface in Ca-K, with AR13186, AR13188, AR13190, AR13191, AR13192, AR13194, AR13195, AR13196, AR13187, AR13198, AR13199 and possible AR1320a.
Sunspot count: group=8, sunspot=64, R=144
Telescope:
For whole-disc: Sharpstar AL80 II refractor, ED Triplet
focal length : 500 mm f/6.25
Camera : ASI1600MM Pro, cooled to -13.0C
Filters: Lunt Ca-K Module B1200.
approximately north is up, east to the left.
2023 January 22 Sun - Solar surface in Ca-K, with AR13186, AR13188, AR13190, AR13191, AR13192, AR13194, AR13195, AR13196
2023 January 22 Sun - Solar surface in Ca-K, with AR13186, AR13188, AR13190, AR13191, AR13192, AR13194, AR13195, AR13196
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