2021 Apr 19 0000 UTC
Sunspot Group Classification Results
Number of Detected Sunspot Groups :           1

Group Index :       1
Ratio of magnetic polarity (+/-) :    0.0471204
[ Z-Class Determination ]
Number of spots :           5
Number of spots with penumbra :           3
Longitudinal extent of this spot group (deg) :      7.38420
Z-Class : D
[ p-Class Determination ]
Asymmetry factor of penumbral shape :      34.4455 (criterion : 50)
N-S diameter of largest penumbra (deg) :      0.95843433 (criterion : 2.5 deg)
Ratio of umbral area to spot area :     0.200000
p-Class : s
[ c-Class Determination ]
Number of spots :           5
Area ratio (spots/group) :     0.289941
Number of spots with penumbra :           3
c-Class :o
McIntosh Class : Dso
[ Magnetic Class Determination ]
Magnetic Class : Alpha