C/2011 J2 LINEAR is a comet, just another one, not very famous. Discovered in May, 2011 in LINEAR program. It had then apparent brightness of 19.7mag. Comet has not approched much Sun – the closest distance between comet and Sun was about 3.4AU (1AU is about 150mln km).
Above is the two frames made in February, 2014. And below is negative stack 5×5 minutes: