[captainclock1988]

Howdy, You can refer to the link I have posted below that should clear up any of your confusion regarding mica capacitors.

mica capacitor color code chart

The capacitor in question in your post is a 141 pF Capacitor the yellow dot on the bottom corner of the capacitor is a voltage rating marking which in your case is yellow which means your capacitor is a 400VDC capacitor.

I hope this helps you out.