2021 Apr 13 1300 UTC Sunspot Group Classification Results Number of Detected Sunspot Groups : 1 Group Index : 1 Ratio of magnetic polarity (+/-) : 1.32997 Only one magnetic neutral line is found Roughness of the only magnetic neutral line : 1.30612 [ Z-Class Determination ] Number of spots : 3 Number of spots with penumbra : 1 Z-Class : C [ p-Class Determination ] Asymmetry factor of penumbral shape : 59.6683 (criterion : 50) N-S diameter of largest penumbra (deg) : 0.62818310 (criterion : 2.5 deg) Ratio of umbral area to spot area : 0.0857143 p-Class : a [ c-Class Determination ] Number of spots : 3 Area ratio (spots/group) : 0.108225 Number of spots with penumbra : 1 c-Class :o McIntosh Class : Cao [ Magnetic Class Determination ] Magnetic Class : Beta