Update - 20121214 - C/2012 V4 has crossed the HI1B imager in images of 20121211. Looks elongated due to is close proximity to the imager and its orbital speed. each HI1B image is a sum of several short duration images.
Currently in STEREO HI2B imager is a comet showing a dynamic streaming tail. This is due to interactions with the solar wind, standby for more interactions if a CME passes by.
This is Comet C/2012 V4, it has been said that this is a return of a lost comet D/1827 M1 (Pons-Gambart). But this has yet to be officially confirmed.
