2018 Feb 05 2100 UTC Sunspot Group Classification Results Number of Detected Sunspot Groups : 1 Group Index : 1 Ratio of magnetic polarity (+/-) : 0.401174 Only one magnetic neutral line is found Roughness of the only magnetic neutral line : 1.65789 [ Z-Class Determination ] Number of spots : 3 Number of spots with penumbra : 1 Z-Class : C [ p-Class Determination ] Asymmetry factor of penumbral shape : 31.3111 (criterion : 25) N-S diameter of largest penumbra (deg) : 2.0597902 (criterion : 2.5 deg) Ratio of umbral area to spot area : 0.0973451 p-Class : a [ c-Class Determination ] Number of spots : 3 Area ratio (spots/group) : 0.555556 Number of spots with penumbra : 1 c-Class :i McIntosh Class : Cai [ Magnetic Class Determination ] Magnetic Class : Beta