2015 Dec 31 1800 UTC Sunspot Group Classification Results Number of Detected Sunspot Groups : 2 Group Index : 1 Ratio of magnetic polarity (+/-) : 5.22314 [ Z-Class Determination ] Number of spots : 3 Number of spots with penumbra : 3 Longitudinal extent of this spot group (deg) : 2.82055 Z-Class : D [ p-Class Determination ] Asymmetry factor of penumbral shape : 42.1158 (criterion : 25) N-S diameter of largest penumbra (deg) : 2.0250051 (criterion : 2.5 deg) Ratio of umbral area to spot area : 0.165049 p-Class : a [ c-Class Determination ] Number of spots : 3 Area ratio (spots/group) : 0.634454 Number of spots with penumbra : 3 c-Class :c McIntosh Class : Dac [ Magnetic Class Determination ] Magnetic Class : Alpha Group Index : 2 Ratio of magnetic polarity (+/-) : 0.00000 [ Z-Class Determination ] Number of spots : 1 Number of spots with penumbra : 0 Z-Class : A [ p-Class Determination ] p-Class : x [ c-Class Determination ] Number of spots : 1 c-Class :x McIntosh Class : Axx [ Magnetic Class Determination ] Magnetic Class : Alpha