2021 Apr 13 2000 UTC
Sunspot Group Classification Results
Number of Detected Sunspot Groups :           1

Group Index :       1
Ratio of magnetic polarity (+/-) :      1.12838
Only one magnetic neutral line is found
Roughness of the only magnetic neutral line :      1.64286
[ Z-Class Determination ]
Number of spots :           3
Number of spots with penumbra :           1
Z-Class : C
[ p-Class Determination ]
Asymmetry factor of penumbral shape :      100.586 (criterion : 50)
N-S diameter of largest penumbra (deg) :      0.37696213 (criterion : 2.5 deg)
Ratio of umbral area to spot area :     0.428571
p-Class : a
[ c-Class Determination ]
Number of spots :           3
Area ratio (spots/group) :     0.543478
Number of spots with penumbra :           1
c-Class :i
McIntosh Class : Cai
[ Magnetic Class Determination ]
Magnetic Class : Beta