2021 January 12 Sun - prominences on the NW solar limb

[PTS]

2021 January 12 Sun - prominences on the NW solar limb

Sunspot count: group=0, sunspots=0, R=0

For H-alpha images:
Telescope: Lunt LS50T with B1200 blocking filter + 2X barlow
Camera : ASI174MM and ASI174MC
exposure: 16.0 ms (monochrome), 15.0 ms (colour)

For Ca-K images:
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: 8.0 ms

approximately north is up, east to the left

[PTS]

H-alpha images in colour

[PTS]

Images in Ca-K

[Eddy So]