[Credit & Copyright: Babak Tafreshi (TWAN)]
Go over to spaceweather.com to see Ison pictures from all over the world.
Comets used to be considered iceballs, but now they are thought of as metal slag the gets arc welded when close to the sun.
Here, as before, Starry Night greatly exaggerates the brightness of the comet, although the tail length is not much longer than the 2 degrees mentioned. ( You can use the celestial latitude marks at the very top for comparison. )
Note NGC 4697, which is a magnitude 11 object, per the Wiki link. In the photo it has a yellowish tint.
Note also that the photo shows many dimmer stars. So what I'm saying is, they're really hyping this thing. If it flairs into magnificence, as they're hoping for, I'll be pleased but very surprised. It just seems to me it's a physically small object.
I have been trying to shoot Ison myself. It is actually out the window as I type but I’m west of downton Denver and the city lights are too much plus the moon has not set.
We will try again in early December when Ison is on the other side of the sun and will be visible in the dark west sky. By then it could be spectacular as it had passed less than 1M miles from the surface.