2017 May 21 1800 UTC Sunspot Group Classification Results Number of Detected Sunspot Groups : 2 Date G_Ind Lat Lon Num_Spot Num_Spot_Pen Lon_Ext N-S Ratio_Area Ratio_Um Ratio_Pol Assym Num_Neutral Rough Zpc Wilson 201705211800 1 - 7.5 24.5 2 1 1.6 0.61 0.57 0.27 100.00 35.82 0 -99.00 Csi Alpha 201705211800 2 11.1 27.8 1 1 0.6 0.63 -99.00 0.23 2.00 35.76 1 1.14 Hsx Alpha