2021 April 23 Sun - solar surface in white-light, with AR12816 and AR12818

[PTS]

2021 April 23 Sun - solar surface in white-light, with AR12816 and AR12818

AR12816 has crossed the meridian, and is today located at (S24W20). This group has been very active in the past 24 hours. 9 sunspots are visible, some come with penumbrae. This Class-E group extends more than 10 degrees in longitude.
AR12817 has turned to the backside.
AR12818 is near the SE limb, at (S17E37). A large sunspot with penumbrae is visible, together with faculae, mostly to the south.
sunspot count: group=2, sunspot=10, R=30

Telescope: Celestron C5, 127mm f/10 Schmidt-Cassegrain
Camera : ASI1600MM Pro, not cooled
focal length : 1250 mm f/10
Filters: Baader Solar Film 5.0
approximately north is up, east to the left

[PTS]

Images of AR12818

[Eddy So]