2017 Feb 21 1800 UTC
Sunspot Group Classification Results
Number of Detected Sunspot Groups :           1

Group Index :       1
Ratio of magnetic polarity (+/-) :      1.41714
Only one magnetic neutral line is found
Roughness of the only magnetic neutral line :      1.97619
[ Z-Class Determination ]
Number of spots :           8
Number of spots with penumbra :           1
Z-Class : C
[ p-Class Determination ]
Asymmetry factor of penumbral shape :      28.1564 (criterion : 25)
N-S diameter of largest penumbra (deg) :       1.9014605 (criterion : 2.5 deg)
Ratio of umbral area to spot area :     0.147826
p-Class : a
[ c-Class Determination ]
Number of spots :           8
Area ratio (spots/group) :     0.232489
Number of spots with penumbra :           1
c-Class :o
McIntosh Class : Cao
[ Magnetic Class Determination ]
Magnetic Class : Beta