2885
2886
Alpha
63
63
  • Area = 1
  • Zurich = A
  • Penumbra = no penumbra (Zurich class A or B)
  • Leading =
  • NN = 2
64
64
  • Area = 3
  • Zurich = H
  • Penumbra = small symmetric (s) north to south diameter < 2.5
  • Leading =
  • NN = 1

Catania sunspot groups
2021-10-18 07:00:00
NOAA AR/sunspot
NOAA Halpha plage
NOAA expected region
2021-10-19 00:30:00
PROBA2/SWAP 17.4nm
2021-10-18T23:21:29.943