Using the naked eye I estimate Lulin to be magnitude 5.5 now, about equal to the star 21 Vir (mag 5.47). Using a 12" Dob and an 8mm EP (field 25') I estimate the diameter to be 12'. The core is almost stellar. The tail is at least 80' long. It is brighter than the anti tail but narrower. The anti tail is about 50' long. I observed the tails with a 21mm EP with field 65'. The comet's movement with respect to a nearby mag 8.6 star was obvious. This image by Gregg Ruppel on 16/2 gives an idea
http://spaceweather.com/comets/lulin...gg-Ruppel1.jpg