  We present results of two-year photometric monitoring of Comet C/2011 J2
(LINEAR) that spans the time period from February 2013 through December 2014,
before and after perihelion passage. The observations were conducted with
broadband R filter. Analysis of observations of Comet C/2011 J2 (LINEAR) allows
estimating the nucleus radius as function of geometric albedo and
phase-darkening coefficient. Furthermore, our observations showed split of the
comet. Fragment (B) additional to the primary C/2011 J2 nucleus was
unambiguously detected; relative velocity is estimated to be near 0.17 ''/day.
We derive the Afrho parameter and estimate the dust production rate in Comet
C/2011 J2 (LINEAR) over the entire run of observations. We found a noticeable
increase in Afrho parameter between September 18, 2014 and November 5, 2014,
epoch when the nucleus presumably got split. On September 28, 2014, we observed
a transit of the 16-magnitude star (USNO-A2 1275-18299027) near nucleus of the
Comet C/2011 J2 (LINEAR). We retrieve the optical depth of the coma 0.034. The
filling factor f that corresponds to such optical depth is in good quantitative
agreement with the value that can be derived from the Afrho parameter under
reasonable assumption on geometric albedo of cometary dust.
