Comet Lemmon C/2012 - Stunning lime green coma !

Sources:
http://apod.nasa.gov/apod/ap130207.html
http://www.aerith.net/comet/catalog/2012F6/2012F6.html
http://www.flickr.com/photos/46302893@N02/8473404726/
http://www.philhart.com/content/comet-lemmon-c2012-f6-february-2013