2015 Dec 31 1500 UTC Sunspot Group Classification Results Number of Detected Sunspot Groups : 1 Group Index : 1 Ratio of magnetic polarity (+/-) : 5.16379 [ Z-Class Determination ] Number of spots : 3 Number of spots with penumbra : 3 Longitudinal extent of this spot group (deg) : 2.72603 Z-Class : D [ p-Class Determination ] Asymmetry factor of penumbral shape : 44.9439 (criterion : 25) N-S diameter of largest penumbra (deg) : 1.9974658 (criterion : 2.5 deg) Ratio of umbral area to spot area : 0.152381 p-Class : a [ c-Class Determination ] Number of spots : 3 Area ratio (spots/group) : 0.651260 Number of spots with penumbra : 3 c-Class :c McIntosh Class : Dac [ Magnetic Class Determination ] Magnetic Class : Alpha