2020 November 27 Sun - solar surface in Ca-K, with AR12783, AR12784, AR12785 and AR12786

[PTS]

2020 November 27 Sun - solar surface in Ca-K, with AR12783, AR12784, AR12785 and AR12786

AR12783 remains active. A few flares are visible, so are 3 sunspots.

AR12784 is reduced to a few plages.

AR12785 produces some flares, mainly in the following group. The large sunspot dominates the leading group.

AR12786 continue to develop into a complex active region, with flares showing up in extensive arena. At least 9 sunspots are visible. There is evidence that the main leading sunspot is splitting up, and several small umbrae appear within the penumbra.

sunspot count: group=3, sunspot=13, R=43
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
exposure: 0.35 - 0.40 ms
approximately north is up, east to the left

[PTS]

Images of AR12784, AR12785 and AR12786

[Eddy So]