Dr. Mark Sircus: Here Comes Elenin :

Dr. Mark Sircus: Here Comes Elenin : “At its present position beyond the orbit of Mars, Elenin is a faint telescopic object. At that distance a planet-sized object would be one of the brightest ‘stars’ in the night sky one would think, and if it were Jupiter-sized it would be visually spectacular, a shining beacon that would make everyone take notice!

But no, that does not seem to be the case. Large amateur telescopes are straining to even catch a glimpse of Elenin; it is likely a small object, probably a big rock,” writes one blogger