— Comet ISON (@CometISONnews) October 3, 2013
Mobberley notes that the object in the tail is just a background star. Some research shows that this object appears to be a magnitude 16.5 star. Here’s what it looks like in Stellarium zoomed-in.
Updated 10/05/2013: Here’s an updated image from Mobberly of ISON on October 4th.
— Comet ISON (@CometISONnews) October 5, 2013
A similar image was captured by Nirmal Paul on the same day using iTelescope.
— Comet ISON (@CometISONnews) October 4, 2013
Images of ISON should be getting better now since light from the moon is causing less interference.
Also, with the Moon exiting the morning sky, we enter a two week period where it won't interfere with hunting for Comet #ISON.
— David Dickinson (@Astroguyz) October 4, 2013